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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.
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Journal ArticleDOI
Elevating optical activity: Efficient on-edge lithography of three-dimensional starfish metamaterial
Kay Dietrich,Christoph Menzel,Dennis Lehr,Oliver Puffky,U. Hübner,Thomas Pertsch,Andreas Tünnermann,Ernst-Bernhard Kley +7 more
TL;DR: In this article, a millimeter sized array of both the planar chiral and the true 3D chiral starfish is realized, and their chiroptical performances are compared by circular dichroism measurements.
Journal ArticleDOI
High harmonic generation by novel fiber amplifier based sources.
Steffen Hädrich,Jan Rothhardt,Manuel Krebs,Franz Tavella,A. Willner,Jens Limpert,Andreas Tünnermann +6 more
TL;DR: Significant progress in high repetition rate ultrashort pulse sources based on fiber technology is presented and high average power few-cycle pulses of a fiber amplifier pumped optical parametric chirped pulse amplifier are used to produce µW level average power for the strongest harmonic.
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Polarization-independent negative-index metamaterial in the near infrared
Christian Helgert,Christoph Menzel,Carsten Rockstuhl,Ekaterina Pshenay-Severin,Ernst-Bernhard Kley,Arkadi Chipouline,Andreas Tünnermann,Falk Lederer,Thomas Pertsch +8 more
TL;DR: A design for a negative-index metamaterial that is termed the "Swiss cross" structure that eliminates the drawback of polarization-dependent effective optical parameters and reveals an effective refractive index of n=-1.9 at an operational wavelength of 1400 nm that is independent of the incident polarization.
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Controlling plasmonic hot spots by interfering Airy beams.
Angela E. Klein,Alexander Minovich,Michael Steinert,Norik Janunts,Andreas Tünnermann,Dragomir N. Neshev,Yuri S. Kivshar,Thomas Pertsch +7 more
TL;DR: The generation of a plasmonic hot spot on the surface of a metal film is predicted and demonstrated by the interference of two Airy surface plasmons and the position of the hot spot can be controlled by the distance between the excitation gratings as well as by the phase front of the initial excitation.
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High energy ultrashort pulses via hollow fiber compression of a fiber chirped pulse amplification system
TL;DR: A simple, robust and compact pulse compressor for a high-repetition rate high-peak power fiber chirped pulse amplification system is presented and noble-gas-filled hollow fibers are used for spectral broadening of the optical pulses via self-phase modulation.