HELGERT, CHRISTIAN

Doctoral thesis

Job after graduation

  • since 2011: Postdoctoral Fellow at the Nonlinear Physics Centre, Australian National University, Canberra, Australia
  • since 2012: CEO at the Abbe Center of Photoncis, Friedrich-Schiller-Universität Jena

List of publications

  • E. Pshenay-Severin, M. Falkner, C. Helgert, and T. Pertsch, "Ultrabroadband performance measurement of nanostructured metasurfaces," Appl. Phys. Lett. 104, 221906 (2014).
  • M. Albooyeh, S. Kruk, C. Menzel, C. Helgert, M. Kroll, A. Krysinski, M. Decker, D.N. Neshev, T. Pertsch, C. Etrich, C. Rockstuhl, S.A. Tretyakov, C.R. Simovski and Y.S. Kivshar, "Resonant metasurfaces at the oblique incidence: Interplay of order and disorder," Sci. Rep. 4, 4484 (2014).
  • S. Kruk, C. Helgert, M. Decker, I. Staude, C. Menzel, C. Etrich, C. Rockstuhl, C. Jagadish, T. Pertsch, D.N. Neshev, and Y.S. Kivshar, "Optical metamaterials with quasicrystalline symmetry: Symmetry-induced optical isotropy," Phys. Rev. B 88, 201404(R), (2013).
  • T.W.H. Oates, B. Dastmalchi, C. Helgert, L. Reissmann, U. Hübner, E.-B. Kley, M.A. Verschuuren, I. Bergmair, T. Pertsch, K. Hingerl, and K. Hinrichs, "Optical activity in sub-wavelength metallic grids and metamaterials in the conical mount," Opt. Mater. Express 3, 439-451 (2013).
  • B. Walther, C. Helgert, C. Rockstuhl, F. Setzpfandt, F. Eilenberger, E.-B. Kley, F. Lederer, A. Tünnermann, and T. Pertsch, "Spatial and spectral light shaping with optical metamaterials," Adv. Mater. 24, 6300-6304 (2012).
  • K. Dietrich, D. Lehr, C. Helgert, A. Tünnermann, and E.-B. Kley, "Circular dichroism from Chiral Nanomaterial fabricated by On-Edge Lithograpy," Adv. Mater. 24, OP321-OP325 (2012).
  • M. Losurdo, I. Bergmair, M. M. Giangregorio, B. Dastmalchi, G.V. Bianco, C. Helgert, E. Pshenay-Severin, M. Falkner, T. Pertsch, E.-B. Kley, U. Hübner, M.A. Verschuuren, M. Mühlberger, K. Hingerl, and G. Bruno, "Enhancing Chemical and Optical Stability of Silver Nanostructures by Low-Temperature Hydrogen Atoms Processing," J. Phys. Chem. C 116, 23004-23012 (2012).
  • J. Reinhold, M.R. Shcherbakov, A. Chipouline, V.I. Palov, C. Helgert, T. Paul, C. Rockstuhl, F. Lederer, E.-B. Kley, A. Tünnermann, A.A. Fedyanin, and T. Pertsch, "Contribution of the magnetic resonance to the third harmonic generation from a fishnet metamaterial," Phys. Rev. B. 86, 115401 (2012).
  • I. Bergmair, W. Hackl, M. Losurdo, C. Helgert, G. Isic, M.M. Jakovljevic, T. Müller, M. Giangregorio, E.-B. Kley, T. Fromherz, G. Bruno, T. Pertsch, R. Gajic, and M. Muehlberger, "Nano- and microstructuring of graphene using UV-NIL," Nanotechnology 23, 335301 (2012).

  • T.W.H. Oates, B. Dastmalchi, G. Isic, S. Tollabimazraehno, C. Helgert, T. Pertsch, E.-B. Kley, M. Verschuuren, I. Bergmair, K. Hingerl, and K. Hinrichs, "Oblique incidence optical characterization and the substrate dependence of visible frequency fishnet metamaterials," Opt. Express 20, 11166-11177 (2012).
  • C. Helgert, K. Dietrich, D. Lehr, T. Käsebier, T. Pertsch, and E.-B. Kley, "A dedicated multilayer technique for the fabrication of three-dimensional metallic nanoparticles," Microelectron. Eng. 97, 181-184 (2012).
  • C. Menzel, R. Alaee, E. Pshenay-Severin, C. Helgert, A. Chipouline, C. Rockstuhl, T. Pertsch, and F. Lederer, "Genuine effectively biaxial left-handed metamaterials due to extreme coupling," Opt. Lett. 37, 596-598 (2012).
  • D. Lehr, K. Dietrich, C. Helgert, T. Käsebier, H.-J. Fuchs, A. Tünnermann, and E.-B. Kley, "Plasmonic properties of aluminium nanorings fabricated by double patterning," Opt. Lett. 37, 157-159 (2012).
  • C. Helgert, E. Pshenay-Severin, M. Falkner, C. Menzel, E.-B. Kley, A. Tünnermann, C. Rockstuhl, F. Lederer, and T. Pertsch, "Chiral metamaterial composed of three-dimensional plasmonic nanostructures," Nano Lett. 11, 4400-4404 (2011).
  • I. Bergmair, B. Dastmalchi, M. Bergmair, A. Saeed, W. Hilber, G. Hesser, C. Helgert, E. Pshenay-Severin, T. Pertsch, E.-B. Kley, U. Hübner, N.-H. Shen, R. Penciu, M. Kafesaki, C.M. Soukoulis, K. Hingerl, M. Mühlberger, and R. Schoeftner, "Single and multilayer Metamaterials fabricated by Nanoimprint Lithography," Nanotechnology 22, 325301 (2011).
  • C. Rockstuhl, C. Menzel, S. Mühlig, J. Petschulat, C. Helgert, A. Chipouline, T. Pertsch, and F. Lederer, "Scattering properties of metaatoms," Phys. Rev. B 83, 245119 (2011).
  • C. Helgert, C. Rockstuhl, C. Etrich, E.-B. Kley, A. Tünnermann, F. Lederer, and T. Pertsch, "Effects of anisotropic disorder in an optical metamaterial," Appl. Phys. A. 103, 591-595 (2011).
  • B. Walther, C. Helgert, C. Rockstuhl, and T. Pertsch, "Diffractive optical elements based on plasmonic metamaterials," Appl. Phys. Lett., 98, 191101 (2011).
  • J. Petschulat, C. Helgert, M. Steinert, N. Bergner, C. Rockstuhl, A. Tünnermann, F. Lederer, T. Pertsch, and E.-B. Kley, "Plasmonic modes of extreme subwavelength nanocavities," Opt. Lett. 35, 2693-2695 (2010).
  • C. Menzel, C. Helgert, C. Rockstuhl, E.-B. Kley, A. Tünnermann, T. Pertsch, and F. Lederer, "Asymmetric transmission of linearly polarized light at optical metamaterials," Phys. Rev. Lett. 104, 253902 (2010).
  • E. Pshenay-Severin, F. Setzpfandt, C. Helgert, U. Hübner, C. Menzel, C. Rockstuhl, A. Tünnermann, F. Lederer, and T. Pertsch, "Experimental determination of the dispersion relation of light in metamaterials by white-light interferometry," J. Opt. Soc. Am. B 27, 660 (2010).
  • C. Menzel, C. Helgert, J. Üpping, C. Rockstuhl, E.-B. Kley, R. Wehrspohn, T. Pertsch, and F. Lederer, "Angular resolved effective optical properties of a Swiss cross metamaterial," Appl. Phys. Lett. 95, 131104 (2009).
  • C. Helgert, C. Rockstuhl, C. Etrich, E.-B. Kley, A. Tünnermann, F. Lederer, and T. Pertsch, "Effective properties of amorphous metamaterials," Phys. Rev. B 79, 233107 (2009).
  • E. Pshenay-Severin, U. Hübner, C. Menzel, C. Helgert, A. Chipouline, C. Rockstuhl, A. Tünnermann, F. Lederer, and T. Pertsch, "A Double-Element Metamaterial with a Negative Index at Near Infrared Wavelengths," Opt. Lett. 34, 1678-1680 (2009).
  • C. Helgert, C. Menzel, C. Rockstuhl, E. Pshenay-Severin, E.-B. Kley, A. Chipouline, A. Tünnermann, F. Lederer, and T. Pertsch, "Polarization independent negative-index metamaterial in the near-infrared," Opt. Lett. 34, 704-706 (2009).
  • M. Kroll, S. Fahr, C. Helgert, C. Rockstuhl, F. Lederer, and T. Pertsch, "Employing dielectric diffractive structures in solar cells: A numerical study," Phys. Status Solidi A 205, 2777-2795 (2008).