Publications

2018

show Content M. Nissen, B. Doherty, J. Hamperl, J. Kobelke, K. Weber, T. Henkel, M. A. Schmidt, "UV Absorption Spectroscopy in Water-Filled Antiresonant Hollow Core Fibers for Pharmaceutical Detection," Sensors 18, 478-480 (2018)

Abstract

Due to a worldwide increased use of pharmaceuticals and, in particular, antibiotics, a growing number of these substance residues now contaminate natural water resources and drinking supplies. This triggers a considerable demand for low-cost, high-sensitivity methods for monitoring water quality. Since many biological substances exhibit strong and characteristic absorption features at wavelengths shorter than 300 nm, UV spectroscopy presents a suitable approach for the quantitative identification of such water-contaminating species. However, current UV spectroscopic devices often show limited light-matter interaction lengths, demand sophisticated and bulky experimental infrastructure which is not compatible with microfluidics, and leave large fractions of the sample analyte unused. Here, we introduce the concept of UV spectroscopy in liquid-filled anti-resonant hollow core fibers, with large core diameters and lengths of approximately 1 m, as a means to overcome such limitations. This extended light-matter interaction length principally improves the concentration detection limit by two orders of magnitude while using almost the entire sample volume—that is three orders of magnitude smaller compared to cuvette based approaches. By integrating the fibers into an optofluidic chip environment and operating within the lowest experimentally feasible transmission band, concentrations of the application-relevant pharmaceutical substances, sulfamethoxazole (SMX) and sodium salicylate (SS), were detectable down to 0.1 µM (26 ppb) and 0.4 µM (64 ppb), respectively, with the potential to reach significantly lower detection limits for further device integration.

doi: 10.3390/s18020478

show Content Presentations at conferences

Talks

  • Ni. Jayakumar, R. Sollapur, A. Hoffmann, T. Grigorova, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt, C. Spielmann, “Polarization Evolution in  Antiresonant Hollow-Core Fibers”, Conference on Lasers and Electro-Optics, 2018.

  • Rudrakant Sollapur, Bruno Schmidt, Philippe Lassonde, Shoufei Gao, Yingying Wang, Pu Wang, François Légaré, Christian Spielmann, "2.5 Cycle Pulses Obtained With Self Compression At 1.8 μm In Antiresonant Waveguides ", Conference on Lasers and Electro-Optics, 2018.
  • R. Sollapur, D. Kartashov, M. Zürch, B. E. Schmidt, A. Hoffmann, T.Grigorova, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M Chemnitz, S. Gao, Y. Wang, P. Wang, P. Lassonde, M A. Schmidt, F. Légaré, C. Spielmann / „Supercontinuum and few cycle pulse generation in antiresonant hollow core fibers“: Photonics North, Montreal 2018

  • Vittoria Schuster, Robert Klas, Vinzenz Hilbert, Maxim Tschernajew, Jan Rothhardt, Jens Limpert, Birgitta Bernhard / „Twin Pulse High Harmonic Generation for XUV Fourier Transform Spectroscopy”: Photonics North, Montreal 2018

  • Kim Lammers, Stefan Nolte / „Embedded Nanogratings for Polarization Control in Femtosecond Laser Direct Written Waveguides”: Photonics North, Montreal 2018

  • Maximilian Heck, Réal Vallée, Andreas Tünnermann, Stefan Nolte, Martin Bernier / „Femtosecond-written long period gratings in fluoride fibers”: Photonics North, Montreal 2018

  • Brenda Doherty, Markus A. Schmidt / „Plasmonic nanoparticle-functionalised microstructured optical fibres for biosensing-An optofluidic sensing platform”: Photonics North, Montreal 2018

  • Alessandro Alberucci, Stefan Nolte / „Photonic potential for TM waves”: Photonics North, Montreal 2018

  • Friedrich G. Fröbel, V. Engel, Stefanie Gräfe / „Spin-Dependent Asymmetries in the Photoelectron Momentum Distributions in Single-Photon Double Ionization”: Photonics North, Montreal 2018

Poster

  • Christoph Stihler, Cesar Jauregui , Andreas Tünnermann, Jens Limpert  / „Thermally-induced refractive index gratings enabling modal energy transfer in Yb-doped fibers”: Photonics North, Montreal 2018

  • E. Shestaev, D. Hoff, S. Hädrich, F. Just, T. Eidam, M. Sayler, A. Drozdy, P. Jójárt, A. Szabó, Z. Várallyay, K. Osvay, G.G. Paulus, A. Tünnermann, J. Limpert / „Towards Highly Carrier-Envelope Stable High-Power Few-Cycle Fiber Lasers”: Photonics North, Montreal 2018

  • T. Lühder, T. Wieduwilt, H. Schneidewind, M. A. Schmidt / „Electrically induced tunability  of surface plasmon polaritons in gold coated tapered fibers”: Photonics North, Montreal 2018

  • A.L.M. Muniz, M.Wimmer, A.Bisianov, D.N. Christodoulides, R.Morandotti, U. Peschel / „ Nonlinear Wave Collapse at mW-Power”: Photonics North, Montreal 2018

  • A.L.M. Muniz, M.Wimmer, A.Bisianov, D.N. Christodoulides, R.Morandotti, U. Peschel / „ Nonlinear Wave Collapse at mW-Power”: Photonics North, Montreal 2018

  • Arstan Bisianov, Mark Kremer, Martin Wimmer, Ulf Peschel / „Experiments on Nonlinearity-Driven Excitation of Topological and Trivial states”: Photonics North, Montreal 2018

  • Kay Schaarschmidt, Markus A. Schmidt / „Higher-Order Mode Third Harmonic Generation in Liquid-Core-Optical-Fiber using ultrafast pulses”: Photonics North, Montreal 2018

 

 

2017

show Content B. Doherty, A. Csáki, M. Thiele, M. Zeisberger, A. Schwuchow, J. Kobelke, W. Fritzsche, and M. Schmidt, "Nanoparticle functionalised small-core suspended-core fibre - a novel platform for efficient sensing," Biomed. Opt. Express 8, 790-799 (2017).

Abstract

Detecting small quantities of specific target molecules is of major importance within bioanalytics for efficient disease diagnostics. One promising sensing approach relies on combining plasmonically-active waveguides with microfluidics yielding an easy-to-use sensing platform. Here we introduce suspended-core fibres containing immobilised plasmonic nanoparticles surrounding the guiding core as a concept for an entirely integrated optofluidic platform for efficient refractive index sensing. Due to the extremely small optical core and the large adjacent microfluidic channels, over two orders of magnitude of nanoparticle coverage densities have been accessed with millimetre-long sample lengths showing refractive index sensitivities of 170 nm/RIU for aqueous analytes where the fibre interior is functionalised by gold nanospheres. Our concept represents a fully integrated optofluidic sensing system demanding small sample volumes and allowing for real-time analyte monitoring, both of which are highly relevant within invasive bioanalytics, particularly within molecular disease diagnostics and environmental science.

doi: 10.1364/BOE.8.000790

show Content B. Doherty, M. Thiele, S. Warren-Smith, E. Schartner, H. Ebendorff-Heide, W. Fritzsche, M. A. Schmidt, "Plasmonic nanoparticle-functionalized exposed-core fiber—an optofluidic refractive index sensing platform," Opt. Lett.42, 4395-4398 (2017)

Abstract

Here, we show that immobilizing ensembles of gold nanospheres within tailored areas on the open side of an exposed-core microstructured fiber yields a monolithic, highly sensitive plasmon-based refractive index sensor. The nanoparticle densities (average nanoparticle diameter: 45 nm) on the small-core fiber (core diameter: 2.5 μm) are controlled electrostatically, yielding densities of 4  nanoparticles/μm2. Refractive index sensitivities of 200 nm/RIU for aqueous analytes at high fringe contrast levels (−20  dB) have been observed. Our concept presents an easy-to-use, efficient, and multiplex-compatible sensing platform for rapid small-volume detection with the capacity for integration into a bioanalytic, optofluidic, or microfluidic system.

doi: 10.1364/OL.42.004395

show Content M. Falge, F.G. Fröbel, V. Engel, and S. Gräfe, Time-resolved photoelectron spectroscopy of IR-driven electron dynamics in a charge transfer model system”, Phys. Chem. Chem. Phys. (2017).

If the adiabatic approximation is valid, electrons smoothly adapt to molecular geometry changes. In contrast, as a characteristic of diabatic dynamics, the electron density does not follow the nuclear motion. Recently, we have shown that the asymmetry in time-resolved photoelectron spectra serves as a tool to distinguish between these dynamics [Falge et al., J. Phys. Chem. Lett., 2012, 3, 2617]. Here, we investigate the influence of an additional, moderately intense infrared (IR) laser field, as often applied in attosecond time-resolved experiments, on such asymmetries. This is done using a simple model for coupled electronic-nuclear motion. We calculate time-resolved photoelectron spectra and their asymmetries and demonstrate that the spectra directly map the bound electron–nuclear dynamics. From the asymmetries, we can trace the IR field-induced population transfer and both the field-driven and intrinsic (non-)adiabatic dynamics. This holds true when considering superposition states accompanied by electronic coherences. The latter are observable in the asymmetries for sufficiently short XUV pulses to coherently probe the coupled states. It is thus documented that the asymmetry is a measure for phases in bound electron wave packets and non-adiabatic dynamics.

 

DOI: 10.1039/c7cp01832k

show Content M. Gebhardt, C. Gaida, F. Stutzki, S. Hädrich, C. Jauregui, J. Limpert, and A. Tünnermann, "High average power nonlinear compression to 4  GW, sub-50  fs pulses at 2  μm wavelength," Opt. Lett. 42, 747-750 (2017).

Abstract

The combination of high-repetition-rate ultrafast thulium-doped fiber laser systems and gas-based nonlinear pulse compression in waveguides offers promising opportunities for the development of high-performance few-cycle laser sources at 2 μm wavelength. In this Letter, we report on a nonlinear pulse compression stage delivering 252 μJ, sub-50 fs-pulses at 15.4 W of average power. This performance level was enabled by actively mitigating ultrashort pulse propagation effects induced by the presence of water vapor absorptions.

doi: 10.1364/OL.42.000747

show Content M. Gebhardt et al , "Nonlinear pulse compression to 43  W GW-class few-cycle pulses at 2  μm wavelength," Opt. Lett. 42, 4179-4182 (2017).

Abstract

High-average power laser sources delivering intense few-cycle pulses in wavelength regions beyond the near infrared are promising tools for driving the next generation of high-flux strong-field experiments. In this work, we report on nonlinear pulse compression to 34.4 μJ-, 2.1-cycle pulses with 1.4 GW peak power at a central wavelength of 1.82 μm and an average power of 43 W. This performance level was enabled by the combination of a high-repetition-rate ultrafast thulium-doped fiber laser system and a gas-filled antiresonant hollow-core fiber.

doi: 10.1364/OL.42.004179

show Content L. Maczewsky, J. M.Zeuner, S. Nolte, A. Szameit, "Observation of photonic anomalous Floquet topological insulators," Nat. Commun. 8, 13756 (2017).

Topological insulators are a new class of materials that exhibit robust and scatter-free transport along their edges — independently of the fine details of the system and of the edge — due to topological protection. To classify the topological character of two-dimensional systems without additional symmetries, one commonly uses Chern numbers, as their sum computed from all bands below a specific bandgap is equal to the net number of chiral edge modes traversing this gap. However, this is strictly valid only in settings with static Hamiltonians. The Chern numbers do not give a full characterization of the topological properties of periodically driven systems. In our work, we implement a system where chiral edge modes exist although the Chern numbers of all bands are zero. We employ periodically driven photonic waveguide lattices and demonstrate topologically protected scatter-free edge transport in such anomalous Floquet topological insulators.

doi:10.1038/ncomms13756

 

show Content R. Sollapur et al., “Soliton explosion driven multi-octave supercontinuum generation by geometry-enforced dispersion design in antiresonant hollow-core fibers”, arXiv:1701.03540 (2017).

Ultrafast supercontinuum generation in gas-filled waveguides is one enabling technology for many intriguing application ranging from attosecond metrology towards biophotonics, with the amount of spectral broadening crucially depending on the pulse dispersion of the propagating mode. Here we show that the structural resonances in gas-filled anti-resonant hollow core optical fiber provide an additional degree of freedom in dispersion engineering, allowing for the generation of more than three octaves of broadband light ranging deep UV wavelength towards the near infrared.Our observation relies on the introduction of a geometric-induced resonance in the spectral vicinity of the pump laser outperforming the gas dispersion, thus yielding a dispersion being independent of core size, which is highly relevant for scaling input powers.Using a Krypton filled fiber we observe spectral broadening from 200 nm towards 1.7 \mu m at an output energy of about 23 \mu J within a single mode across the entire spectral bandwidth. Simulations show that the efficient frequency generation results from a new physical effect the soliton explosion originating from the strongly non-adiabatic mode dispersion profile.This effect alongside with the dispersion tuning capability of the fiber will enable compact ultrabroadband high energy sources spanning from the UV to the mid-infrared spectral range.

 

arXiv:1701.03540

show Content R. Sollapur et al, “Resonance-enhanced multi-octave supercontinuum generation in antiresonant hollow-core fibers”, Light: Science & Applications (2017)

Abstract

Ultrafast supercontinuum generation in gas-filled waveguides is an enabling technology for many intriguing applications ranging from attosecond metrology towards biophotonics, with the amount of spectral broadening crucially depending on the pulse dispersion of the propagating mode. In this study, we show that structural resonances in a gas-filled antiresonant hollow core optical fiber provide an additional degree of freedom in dispersion engineering, which enables the generation of more than three octaves of broadband light that ranges from deep UV wavelengths to near infrared. Our observation relies on the introduction of a geometric-induced resonance in the spectral vicinity of the ultrafast pump laser, outperforming gas dispersion and yielding a unique dispersion profile independent of core size, which is highly relevant for scaling input powers. Using a krypton-filled fiber, we observe spectral broadening from 200 nm to 1.7 μm at an output energy of approximately 23 μJ within a single optical mode across the entire spectral bandwidth. Simulations show that the frequency generation results from an accelerated fission process of soliton-like waveforms in a non-adiabatic dispersion regime associated with the emission of multiple phase-matched Cherenkov radiations on both sides of the resonance. This effect, along with the dispersion tuning and scaling capabilities of the fiber geometry, enables coherent ultra-broadband and high-energy sources, which range from the UV to the mid‐infrared spectral range.

doi: 10.1038/lsa.2017.124

show Content Presentations at conferences

Poster

  • B. Doherty, "Plasmonic Nanoparticles in Microstructured Fibres as Detection Platforms". NanoBioSensors conference, TU Dresden.

  • F. G. Fröbel, "Analysis of avoided crossings in molecular model systems," DPG Spring Meeting, Mainz Germany (Mar 2017).

  • M. Gebhardt, "Multi-GW, 100 fs thulium-doped fiber laser system for high-harmonic generation at high repetition rates". CLEO EU 2017 (CJ-11.1 THU).

  • M. Gebhardt, C. Gaida, F. Stutzki, S. Hädrich, C. Jauregui, J. Limpert, A. Tünnermann, "High-average power 4 GW pulses with sub-8 optical cycles from a Tm-doped fiber laser driven nonlinear pulse compression stage", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100830B (22 February 2017).

  • M. Gebhardt, C. Gaida, F. Stutzki, C. Jauregui, J. Antonio-Lopez, A. Schulzgen, R. Amezcua-Correa, J. Limpert, and A. Tünnermann, "High average power nonlinear self-compression to few-cycle pulses at 2 µm wavelength in antiresonant hollow-core fiber," in Laser Congress 2017 (ASSL, LAC), OSA Technical Digest (online) (Optical Society of America, 2017), paper ATh3A.6.

  • K. Lammers, "Manipulating Polarization States in Waveguides Using Femtosecond Laser Direct Written.

  • F. J. F. Löchner et al.,  "Polarization dependence of second-harmonic generation in GaAs.

  • Tobias Bucher, Franz J. F. Lochner et al., "Integration of MoS2 Monolayers with Dielectric Nanoantennas".  PIERS St. Petersburg 2017, St. Petersburg, Russia.

  • Aleksandr Vaskin , F. J. F. Lochner et al., "Tailoring Light Emission with Monolithic Nanoantenna Arrays Based on III-V Semiconductors". PIERS St. Petersburg 2017, St. Petersburg, Russia.

  • R. Sollapur, D. Kartashov, M. Zürch, A. Hoffmann, T. Grigorova, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt, C. Spielmann, “Dispersion-Designed Antiresonant Hollow-Core Fibers for Supercontinuum Generation by Soliton Explosion”, Conference on Lasers and Electro-Optics/Europe and the European Quantum Electronics, 2017.

  • Ni. Jayakumar, R. Sollapur, A. Hoffmann, T. Grigorova, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt, C. Spielmann, “Polarization Evolution in  Antiresonant Hollow-Core Fibers, DoKDoK – Doctoral Student Conference on Optics, Suhl, Germany, 2017.

  • M. Mircovich, R. Sollapur, A. Hoffmann,  A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt, C. Spielmann, “Ultraviolet pulse generation and characterization for supercontinuum experiments”, OSAPS Fall Meeting and SOS-AAPT at Miami University, Oxford, USA, 2017.

  • E. Shestaev, “CEP stability of high-power few-cycle fiber lasers”. Ultrafast Optics XI in Jackson Hole, Wyoming, USA (2017).

  • C. Stihler, "Controlling mode instabilities at 628 W average output power in an Yb-doped rodtype fiber amplifier by active modulation of the pump power". Photonics West Conference 2017, San Francisco.

  • C. Stihler, "Mitigation of Mode Instabilities in High-Power Fiber Laser Systems by Active Modulation of the Pump Power". CLEO Europe 2017, München.

Talks

  • Brenda Doherty, "Plasmonic Microstructured Fibres for Biosensing". “20 Years Nano-Optics” international symposium, MPI Erlangen.

  • F. G. Fröbel, "Where the BO-Approximation fails: Analysis of avoided crossings in molecular model systems - An Introduction,"  Institute for Physical Chemistry, Jena (Jan 2017).

  • T. Grigorova, R. Sollapur, N. Jayakumar, A. Hoffmann,  A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt, C. Spielmann, “Dispersion Measurement of Engineered Antiresonant Hollow‐Core Fibers with Spectral Interferometry”, presented at CLEUO Europe 2017 Munich, Germany.

  • R. Sollapur, D. Kartashov, M. Zürch, A. Hoffmann, T. Grigorova, G. Sauer, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. Chemnitz, M. A. Schmidt C. Spielmann, “Multi-octave supercontinuum in dispersion tuned antiresonant hollow-core fibers”, DoKDoK – Doctoral Student Conference on Optics, Suhl, Germany, 2017.

  • M. Zürch, R. Sollapur, D. Kartashov, A. Hoffmann, T. Grigorova, G. Sauer, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt C. Spielmann, “Multi-octave supercontinuum driven by soliton explosion in dispersion-designed antiresonant hollow-core fibers”, Conference on Lasers and Electro-Optics, 2017.

 

 

 

2016

show Content S. Breitkopf et al., "Extraction of enhanced , ultrashort laser pulses from a passive 10- MHz stack-and-dump cavity, " Appl. Phys. B-Lasers and Optics 122 (2016).

Periodic dumping of ultrashort laser pulses from a passive multi-MHz repetition-rate enhancement cavity is a promising route towards multi-kHz repetition-rate pulses with Joule-level energies at an unparalleled average power. Here, we demonstrate this so-called stack-and-dump scheme with a 30-m-long cavity. Using an acousto-optic modulator, we extract pulses of 0.16 mJ at 30-kHz repetition rate, corresponding to 65 stacked input pulses, representing an improvement in three orders of magnitude over previously extracted pulse energies. The ten times longer cavity affords three essential benefits over former approaches. First, the time between subsequent pulses is increased to 100 ns, relaxing the requirements on the switch. Second, it allows for the stacking of strongly stretched pulses (here from 800 fs to 1.5 ns), thus mitigating nonlinear effects in the cavity optics. Third, the choice of a long cavity offers increased design flexibility with regard to thermal robustness, which will be crucial for future power scaling. The herein presented results constitute a necessary step towards stack-and-dump systems providing access to unprecedented laser parameter regimes.

doi:10.1007/s00340-016-6574-x

 

show Content C. Gaida, M. Gebhardt, F. Stutzki, C. Jauregui, J. Limpert, A. Tünnermann, "Thulium-doped fiber chirped-pulse amplification system with 2 GW of peak power," Opt. Lett. 41 (17), 4130-4133 (2016).

Thulium-doped fibers with ultra large mode-field areas offer new opportunities for the power scaling of mid-IR ultrashort-pulse laser sources. Here, we present a laser system delivering a pulse-peak power of 2 GW and a nearly transform-limited pulse duration of 200 fs in combination with 28.7 W of average power. This performance level has been achieved by optimizing the pulse shape, reducing the overlap with atmospheric absorption lines, and incorporating a climate chamber to reduce the humidity of the atmospheric environment.

https://doi.org/10.1364/OL.41.004130

 

show Content S. Hädrich et al., "Energetic sub-2-cycle laser with 216 W average power, " Opt. Lett. 41, 4332-4335 (2016).

Few-cycle lasers are essential for many research areas such as attosecond physics that promise to address fundamental questions in science and technology. Therefore, further advancements are connected to significant progress in the underlying laser technology. Here, two-stage nonlinear compression of a 660 W femtosecond fiber laser system is utilized to achieve unprecedented average power levels of energetic ultrashort or even few-cycle laser pulses. In a first compression step, 408 W, 320 μJ, 30 fs pulses are achieved, which can be further compressed to 216 W, 170 μJ, 6.3 fs pulses in a second compression stage. To the best of our knowledge, this is the highest average power few-cycle laser system presented so far. It is expected to significantly advance the fields of high harmonic generation and attosecond science.

https://doi.org/10.1364/OL.41.004332

show Content R. Klas, S. Demmler, M. Tschernajew, S. Hädrich, Y. Shamir, A. Tünnermann, J. Rothhardt, J. Limpert, "Table-top milliwatt-class extreme ultraviolet high harmonic light source," Optica 3, 1167-1170 (2016).

show Content M. Müller, M. Kienel, A. Klenke, T. Gottschall, E. Shestaev, M. Plotner, J. Limpert, A. Tünnermann, "1 kW 1 mJ eight-channel ultrafast fiber laser, " Opt. Lett. 41, 3439-3442 (2016).

An ultrafast fiber chirped-pulse amplifier comprising eight coherently combined amplifier channels is presented. The laser delivers 1 kW average power at 1 mJ pulse energy and 260 fs pulse duration. Excellent beam quality and low-noise performance are confirmed. The laser has proven suitable for demanding scientific applications. Further power scaling is possible right away using even more amplifier channels.

https://doi.org/10.1364/OL.41.003439

show Content J. Rothhardt et al., "High-repetition-rate and high-photon-flux 70 eV high-harmonic source for coincidence ion imaging of gas-phase molecules" Opt. Lett. 41, 3439-3442 (2016).

We present a table-top coherent diffractive imaging (CDI) experiment based on high-order harmonics generated at 18 nm by a high average power femtosecond fiber laser system. The high photon flux, narrow spectral bandwidth, and high degree of spatial coherence allow for ultrahigh subwavelength resolution imaging at a high numerical aperture. Our experiments demonstrate a half-pitch resolution of 15 nm, close to the actual Abbe limit of 12 nm, which is the highest resolution achieved from any table-top extreme ultraviolet (XUV) or x-ray microscope. In addition, sub-30 nm resolution was achieved with only 3 s of integration time, bringing live diffractive imaging and three-dimensional tomography on the nanoscale one step closer to reality. The current resolution is solely limited by the wavelength and the detector size. Thus, table-top nanoscopes with only a few-nanometer resolutions are in reach and will find applications in many areas of science and technology.

DOI: 10.1364/OE.24.018133

show Content G.K. Tadesse, R. Klas, S. Demmler, S. Hädrich, I. Wahyutama, M. Steinert, C. Spielmann, M. Zurch, T. Pertsch, A. Tünnermann, J. Limpert, J. Rothhardt, "High speed and high resolution table-top nanoscale imaging," Opt. Lett. 41 , 5170-5173 (2016).

We present a table-top coherent diffractive imaging (CDI) experiment based on high-order harmonics generated at 18 nm by a high average power femtosecond fiber laser system. The high photon flux, narrow spectral bandwidth, and high degree of spatial coherence allow for ultrahigh subwavelength resolution imaging at a high numerical aperture. Our experiments demonstrate a half-pitch resolution of 15 nm, close to the actual Abbe limit of 12 nm, which is the highest resolution achieved from any table-top extreme ultraviolet (XUV) or x-ray microscope. In addition, sub-30 nm resolution was achieved with only 3 s of integration time, bringing live diffractive imaging and three-dimensional tomography on the nanoscale one step closer to reality. The current resolution is solely limited by the wavelength and the detector size. Thus, table-top nanoscopes with only a few-nanometer resolutions are in reach and will find applications in many areas of science and technology.

https://doi.org/10.1364/OL.41.005170

 

show Content Presentations at conferences

Talks

  • F. G. Fröbel, "Theoretical Modeling of Nonlinear Optics in Gas-filled Hollow-core Fibers in the Near and Mid-IR - An Introduction,"  Institute for Physical Chemistry, Jena (Feb 2016).

  • F. G. Fröbel, "Theoretical Modeling of Nonlinear Optics in Gas-filled Hollow-core Fibers in the Near and Mid-IR - Status Report, " Abbe School of Photonics, Jena (July 2016).

  • F. G. Fröbel, "Theoretical Modeling of Nonlinear Optics in Gas-filled Hollow-core Fibers in the Near and Mid-IR,"  GRK2101 Summer School, Abbe School of Photonics, Jena (Sep 2016).

  • S. Demmler, T. Eidam, S. Breitkopf, M. Kienel, A. Klenke, M. Müller, F. Stutzki,  H.-J.  Otto, C. Gaida, M. Gebhardt,  G. Tadesse,  T. Gottschall, C. Jauregui, S. Hädrich, J. Rothhardt, T. Schreiber, J. Limpert, A. Tünnermann, "Advances in High Repetition Rate Ultrafast Lasers - Novel Avenues in Science and Industry," HPLA/DE (High Power Laser Ablation and Directed Energy), Santa Fe USA ( 2016).
  • M. Gebhardt, C. Gaida, F. Stutzki, S. Hädrich, C. Jauregui, J. Limpert, and A. Tünnermann, "Self-compression to 24 MW peak power in a fused silica solid-core fiber using a high-repetition rate thulium-based fiber laser system," Photonics West LASE, San Francisco USA (2016).

  • M. Gebhardt, C. Gaida, R. Klas, F. Stutzki, S. Hädrich, S. Demmler, J. Rothhardt, C. Jauregui, J. Limpert, and A. Tünnermann, " High-power nonlinear compression stage delivering sub-50 fs, 0.25 mJ pulses, 15 W at 2 μm wavelength for HHG," ASSL, LSC, LAC, Boston USA (2016).

  • C. Gaida, M. Gebhardt, F. Stutzki, H.-J.  Otto, C. Jauregui, J. Limpert, A. Tünnermann," Average power scaling of ultrashort-pulse Tm-based fiber laser systems," Photonics West LASE, San Francisco USA (2016).

  • C. Gaida, M. Gebhardt, F. Stutzki, S. Hädrich, C. Jauregui, J. Limpert, A. Tünnermann, "High average power GW-level few-cycle pulses at 2 µm wavelength for high photon energy HHG," HILAS; Los Angeles USA (2016).

  • M. Chemnitz, M. Gebhardt, C. Gaida, F. Stutzki, J. Limpert, M. A. Schmidt, "Indications of new solitonic states within mid-IR supercontinuum generated in highly non-instantaneous fiber," CLEO, San Jose USA (2016).

  • F. Stutzki, C. Gaida, M. Gebhardt, R. Klas, S. Demmler, S. Hädrich, J. Rothhardt, C. Jauregui, J. Limpert, and A. Tünnermann, "Nonlinear pulse compression and high-harmonic generation driven by a high repetition rate Tm-based fber CPA system," Europhoton Conference, Vienna Austria (2016).

  • C. Gaida, F. Stutzki, M. Gebhardt, C. Jauregui, J. Limpert, and A. Tünnermann, "Prospects for peak power scaling of Tm-doped fiber CPA systems," ASSL, LSC, LAC,  Boston USA (2016).

  • M. Heck, "Femtosecond laser pulse written Long Period Gratings with minimal out-of-band losses," DokDok (2016).

  • M. Kienel, S. Hädrich, M. Müller, A. Klenke, J. Rothhardt, R. Klas, T. Gottschall, T. Eidam, A. Drozdy, P. Jójárt, Z. Várallyay, E. Cormier, K. Osvay, A. Tünnermann, and J. Limpert, "Few-cycle Laser with 216 W Average Power and 6.3 fs Pulses," ASSL, LSC, LAC, Boston USA (2016).

  • J. Rothhardt, R. Klas, M. Tschernajew, S. Demmler, A. Tünnermann, J. Limpert, "Development of high-repetition rate XUV lasers for storage-ring experiments, " 11th SPARC topical Workshop, Krakow Poland (2016)

  • J. Rothhardt, G. K. Tadesse, S. Hädrich, R. Klas, S. Demmler, J. Limpert and A. Tünnermann, "Fiber-laser based high harmonic sources for nanoscale imaging and spectroscopy , " Frontiers in Optics Conference, Rochester USA (2016).

  • J. Rothhardt, G. K. Tadesse, S. Hädrich, R. Klas, S. Demmler, J. Limpert and A. Tünnermann, "Nanoscale imaging with high photon flux table-top XUV sources," IEEE Photonics Conference, Waikoloa USA (20016).

  • S. Demmler, R. Klas, M. Tschernajew, S. Hädrich, J. Rothhardt, J. Limpert, A. Tünnermann, "Narrowband High Harmonic Source with Multi-mW Average Power Based on Cascaded Frequency Conversion," Ultrafast Phenomena, Santa Fe USA (2016).

  • S. Demmler, R. Klas, M. Tschernajew, S. Hädrich, J. Rothhardt, J. Limpert, A. Tünnermann, "mW Average Power Narrowband High Harmonic Sources," in High-Brightness Sources and Light-Driven Interactions (HILAS), Los Angeles USA (2016).

  • R. Klas, S. Demmler, M. Tschernajew, S. Hädrich, J. Rothhardt, J. Limpert, A. Tünnermann, "Milliwatt Class Narrowband High Harmonic Source Based on Cascaded Frequency Conversion," Europhoton Conference, Vienna Austria (2016).

  • G.K. Tadesse, R. Klas, S. Demmler, S. Hädrich, I. Wahyutama, M. Zürch, M. Steinert, C. Spielmann, A. Tünnermann, J. Limpert  and J. Rothhardt, "High photon flux 70 eV high harmonic source for coherent nanoscale imaging," Europhoton Conference, Vienna Austria (2016).

  • G.K. Tadesse, R. Klas, S. Demmler, S. Hädrich, I. Wahyutama, M. Zürch, C. Spielmann, A. Tünnermann, J. Limpert and J. Rothhardt, "Sub-20 nm Resolution Coherent Diffractive Imaging with a Table-Top XUV Source," Coherence Conference, Saint Malo France (2016).

  • G.K. Tadesse, R. Klas, S. Demmler, S. Hädrich, I. Wahyutama, M. Zürch, C. Spielmann, A. Tünnermann, J. Limpert and J. Rothhardt, "Table-top coherent diffractive imaging – towards sub-10 nm resolution," X-Ray Microscopy Conference (XRM), Oxford UK (2016).

  • S. Hädrich, M. Kienel, M. Müller, A. Klenke, J. Rothhardt, R. Klas, T. Gottschall, T. Eidam, A. Drozdy, P. Jojart, Z. Varallyay, E. Cormier, K. Osvay, A. Tünnermann, J. Limpert, "Utilizing fiber lasers to obtain 220W average power energetic sub 2-cycle pulses," Europhoton Conference, Vienna Austria (2016).

  • R. Klas, S. Hädrich, J. Rothhardt, J.Limpert, A. Tünnermann, M. Aeschlimann, M. Barkowski, S. Sadashivaiah, J. Urbancic, S. Mathias, "High Photon Flux 70 eV HHG Source for Ultrafast Dynamics," Ultrafast Phenomena, Santa Fe USA (2016).

  • F. Löchner,  "Second-harmonic generation in MoS2 monolayers coupled to resonant nanoantennas," DPG-Frühjahrstagung Regensburg, Germany  (March 2016).

  • S. Weimann, M. Kremer, L. Maczewsky, J. M. Zeuner, Y. Plotnik, Y. Lumer, K. G. Makris, M. Segev, M.S. Rudner, S. Nolte, M. C. Rechtsman, A. Szameit, " Non-Hermitian Photonics,"  at META conference , Malaga Spain (July 2016).

  • R. Heilmann, M.Gräfe, L. Maczewsky, S. Nolte, A. Szameit, "A highly precise characterization technique for integrated photonic devices," at CLEO , San Jose  California (June 2016).

  • R. Keil, C. Noh, A. Rai, L. Maczewsky, S. Stützer, S. Nolte, D. G. Angelakis, A, Szameit, "Optical simulations of unphysical Majorana dynamics,"  at CLEO , San Jose California (June 2016).

  • S. Weimann, M. Kremer, L. Maczewsky, J. M. Zeuner, Y. Plotnik, Y. Lumer, K. G. Makris, M. Segev, M.S. Rudner, S. Nolte, M. C. Rechtsman, A. Szameit,  "Non-Hermitian Photonics," at DokDok conference , Malaga Spain (Sep 2016).

  • S. Breitkopf, S. Wunderlich, T. Eidam, E. Shestaev, T. Gottschall, H. Carstens, S. Holzberger, T. Gottschall, H. Carstens, A. Tünnermann, I. Pupeza, and J. Limpert, "Extraction of enhanced, ultrashort laser pulses from a passive 10- MHz stack-and-dump cavity,"  Europhoton Conference, Vienna Austria (2016).

  • S. Breitkopf, S. Wunderlich, T. Eidam, E. Shestaev, T. Gottschall, H. Car- stens, S. Holzberger, I. Pupeza, J. Limpert, and A. Tünnermann, "Investigation of a 10 MHz, non-steady state cavity for pulse energy enhancement of ultrafast fiber lasers," Photonics West LASE, San Francisco USA (2016).

  • A. Klenke, M. Kienel, M. Müller, T. Gottschall, S. Breitkopf, E. Shestaev, C. Jauregui, J. Rothhard, T. Eidam, S. Hädrich, J. Limpert,  A. Tünnermann, "Coherent combination of fiber lasers ," ICUIL, Montebello Canada (2016).

  • A. Klenke, M. Kienel, M. Müller, T. Gottschall, S. Breitkopf, E. Shestaev, C. Jauregui, J. Rothhard, T. Eidam, S. Hädrich, J. Limpert,  A. Tünnermann, "Leistungssteigerungskonzepte für Femtosekundenfaserlaser," Optische Fasern - Aktuelle Trends und zukünftige Entwicklungen, Nürnberg Germany (2016).

  • M Müller, M. Kienel, A. Klenke, T. Gottschall, E. Shestaev, J. Limpert, A. Tünnermann, " 11.7 mJ pulse energy kW-class average power 8-channel ultrafast fibre laser," Europhoton, Vienna Austria (2016).
  • C. Stihler, C. Jauregui, H.-J. Otto, J. Limpert and A.Tünnermann," The impact of photodarkening on the mode instability threshold," DokDok 2016, Oppburg Germany (2016).

  • C. Stihler, C. Jauregui, H.-J. Otto, J. Limpert and A.Tünnermann,"The impact of photodarkening on the mode instability threshold," GRK 2101 - Summer School, Jena Germany (2016). 

  • C. Jauregui, H.-J. Otto, C. Stihler, J. Limpert, A. Tünnermann, "Thermal optimization of high power fiber laser systems," Laser Optics, St. Petersburg Russia (2016).
  • M.Zürch, R. Sollapur, A. Hoffmann, G. Sauer, A. Hartung, D. Kartashov, M. Schmidt,  C. Spielmann, „Octave Broadband Supercontinuum Generation in Gas-Filled Anti-Resonant Hollow-Core Fiber“, CLEO  invited presentation (2016).

  • R. Sollapur, D. Kartashov, M. Zürch, A. Hoffmann, T. Grigorova, G. Sauer, A. Hartung, A. Schwuchow, J. Bierlich, J. Kobelke, M. A. Schmidt, C. Spielmann, “Multi-octave supercontinuum generation in anti-resonant hollow core fibers”, Summer School of the GRK 2101, Abbe Center of Photonics, Jena Germany (2016).

Poster

  • R. Sollapur, M.Zürch,  A. Hoffmann, G. Sauer,  D. Kartashov, M. Schmidt,  C. Spielmann, "Nonlinear optics in gas-filled hollow-core fibers in the near and mid-IR,“  DokDok student conference (2015).

  • R. Sollapur, M.Zürch,  A. Hoffmann, G. Sauer,  D. Kartashov, M. Schmidt,  C. Spielmann, "Nonlinear optics in gas-filled hollow-core fibers in the near and mid-IR,” German Canadian Workshop, University of Toronto Canada (2015).

  • R. Sollapur, M.Zürch,  A. Hoffmann, G. Sauer,  D. Kartashov, M. Schmidt,  C. Spielmann, "Nonlinear optics in gas-filled hollow-core fibers in the near and mid-IR”, The international Workshop “New Frontiers in Fiber Optics” , Leibniz Institute of Photonic Technology, Jena Germany (2016).

  • R. Sollapur, M.Zürch,  A. Hoffmann, G. Sauer,  D. Kartashov, A. Hartung, M. Schmidt,  C. Spielmann, "Multi-octave supercontinuum generation in gas-filled anti-resonant hollow-core fiber”, Siegman International School on Lasers, The Institute of Photonic Sciences, Barcelona Spain (2016).

  • A. Hoffmann, M. Zürch, R. Sollapur, D. Kartashov, T. Grigorova, G. Sauer, A. Hartung, M. Schmidt, ChriC.stian Spielmann, "Scaling supercontinuum generation in gas-lled hollow-core fibers “, Europhoton (2016).

  • T. Grigorova, R. Sollapur, A. Hoffmann, M. Schmidt, A. Hartung, M. Schmidt, C. Spielmann, "Dispersion measurements of a novel anti-resonant hollow-core fiber, “ DokDok student conference (2016).

 

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