Dirk Michaelis
Fraunhofer Society
42 Papers
125 Citations
Dirk Michaelis is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Grating & Photonic crystal. The author has an hindex of 9, co-authored 42 publications. Previous affiliations of Dirk Michaelis include Schiller International University & University of Jena.
Chat about Author
Papers
Plasmonic reflection grating back contacts for microcrystalline silicon solar cells
Ulrich W. Paetzold,Etienne Moulin,Dirk Michaelis,W. Böttler,C. Wächter,V. Hagemann,Matthias Meier,R. Carius,Uwe Rau +8 more
TL;DR: In this article, the fabrication and optical simulation of a plasmonic light-trapping concept for microcrystalline silicon solar cells, consisting of silver nanostructures arranged in square lattice at the ZnO:Al/Ag back contact of the solar cell, was reported.
Disorder improves nanophotonic light trapping in thin-film solar cells
Ulrich W. Paetzold,Michael Smeets,Matthias Meier,Karsten Bittkau,Tsvetelina Merdzhanova,Vladimir Smirnov,Dirk Michaelis,Christoph A. Waechter,R. Carius,Uwe Rau +9 more
TL;DR: In this paper, the impact of disorder in advanced nanophotonic light-trapping concepts of thin-film solar cells has been investigated and it was shown that disorder is conceptually an advantage for thin-filtered solar cells employing grating couplers.
Single-shot, volumetrically illuminated, three-dimensional, tomographic laser-induced-fluorescence imaging in a gaseous free jet
TL;DR: Single-shot, tomographic imaging of the three-dimensional concentration field is demonstrated in a turbulent gaseous free jet in co-flow using volumetrically illuminated laser-induced fluorescence to be sufficient for recording instantaneous three- dimensional features with high signal-to-noise and nominal spatial resolution.
50
Tailoring guided modes in waveguide arrays.
Henrike Trompeter,Ulf Peschel,Thomas Pertsch,Falk Lederer,Ulrich Streppel,Dirk Michaelis,Andreas Bräuer +6 more
TL;DR: Although the symmetric defect waveguide becomes multimode for increased coupling it does not support antisymmetric modes, and theoretical predictions are confirmed in excellent agreement with experimental observations in polymer waveguide arrays.
49
Intense pulses in air: breakup of rotational symmetry.
TL;DR: Calculations that assume rotational symmetry become unrealistic because of the fast growth of azimuthal instabilities shortly after the onset of plasma generation, which are caused chiefly by the Kerr effect.
17