H
Hartmut G. Roskos
Researcher at Goethe University Frankfurt
Publications - 466
Citations - 10555
Hartmut G. Roskos is an academic researcher from Goethe University Frankfurt. The author has contributed to research in topics: Terahertz radiation & Laser. The author has an hindex of 50, co-authored 434 publications receiving 9643 citations. Previous affiliations of Hartmut G. Roskos include Bell Labs & Dresden University of Technology.
Papers
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Coherent submillimeter-wave emission from Bloch oscillations in a semiconductor superlattice
TL;DR: The coherent electromagnetic radiation originating from Bloch oscillations of charge carriers in an electrically biased semiconductor superlattice structure is detected directly and the detection limit of the measurement system is reached.
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Broadband THz emission from gas plasmas induced by femtosecond optical pulses: From fundamentals to applications
TL;DR: In this paper, the authors review the generation of broadband THz radiation from femtosecond photo-induced gas plasmas, with an emphasis on the highly efficient AC-bias case where the plasma is generated and driven by a superposition of fundamental and second-harmonic optical fields.
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A 0.65 THz Focal-Plane Array in a Quarter-Micron CMOS Process Technology
TL;DR: Active multi-pixel imaging of postal envelopes demonstrates the FPAs potential for future cost-effective terahertz imaging solutions.
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Terahertz-pulse generation by photoionization of air with laser pulses composed of both fundamental and second-harmonic waves.
TL;DR: A threshold for THz generation is identified that proves that generation of a plasma is required and that the nonlinearity of air is insufficient to explain measurements, and the plasma emitter is competitive with other state-of-the-art THz emitters.
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Coherent submillimeter-wave emission from charge oscillations in a double-well potential.
Hartmut G. Roskos,Martin C. Nuss,Jagdeep Shah,Karl Leo,David A. B. Miller,A. M. Fox,S. Schmitt-Rink,Klaus Köhler +7 more
TL;DR: Using time-resolved coherent detection of the submillimeter-wave radiation from these spatial charge oscillations, this work traces up to fourteen oscillations at 1.5 THz before phase relaxation destroys the coherence of the oscillating wave packet.