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Andreas Tünnermann
Researcher at Fraunhofer Society
Publications - 1757
Citations - 48543
Andreas Tünnermann is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Fiber laser & Laser. The author has an hindex of 97, co-authored 1738 publications receiving 43757 citations. Previous affiliations of Andreas Tünnermann include Schiller International University & University of Jena.
Papers
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Journal ArticleDOI
Ultra low-loss low-efficiency diffraction gratings.
Tina Clausnitzer,Ernst-Bernhard Kley,Andreas Tünnermann,A. Bunkowski,O. Burmeister,K. Danzmann,Roman Schnabel,S. Gliech,Angela Duparré +8 more
TL;DR: The realization of ultra low-loss dielectric reflection gratings with diffraction efficiencies between 7% and 0.02% is presented, which allows the all-reflective coupling of high laser radiation to high finesse cavities, thereby circumventing thermal effects caused by absorption in the substrate.
Journal ArticleDOI
Hybrid optics for focusing ultrashort laser pulses.
TL;DR: A specially designed hybrid optics comprising refraction and diffraction effects for tight spatial and temporal focusing of ultrashort laser pulses is presented, believed to be the first experimental realization of such a hybrid short plus focusing optics.
Journal ArticleDOI
Femtosecond laser written nanostructures in Ge-doped glasses.
Felix Zimmermann,Matthieu Lancry,Anton Plech,Sören Richter,B. Hari Babu,Bertrand Poumellec,Andreas Tünnermann,Stefan Nolte +7 more
TL;DR: With increasing the Ge doping concentration, the aspect ratio of nanometric pores rises while they arrange in a smaller period in contrast to nanogratings in pristine fused silica, Consequently, higher optical retardance can be obtained demonstrating the pronounced glass decomposition due to the changing network structure.
Proceedings ArticleDOI
Wire-grid polarizer for the UV spectral region
TL;DR: In this article, a metal wire grid polarizer for the UV spectral region is presented, with a height of 150 nm and a width of 35 nm using a spatial frequency doubling technique.
Journal ArticleDOI
Self-guiding of infrared and visible light in photonic crystal slabs
M. Augustin,Rumen Iliew,Christoph Etrich,D. Schelle,H.-J. Fuchs,Ulf Peschel,Stefan Nolte,Ernst-Bernhard Kley,F. Lederer,Andreas Tünnermann +9 more
TL;DR: In this paper, diffractionless guidance and efficient routing of light in two-dimensional photonic crystal slabs at infrared and visible wavelengths at the same wavelength were investigated experimentally.