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Sub-cycle high-order nonlinearities in a terahertz quantum cascade laser
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- Riepl, J. (author)
- University of Regensburg
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- Raab, J. (author)
- University of Regensburg
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- Abajyan, P. (author)
- Paris-Sorbonne University
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- (creator_code:org_t)
- 2022
- 2022
- English.
- In: IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. - 2162-2035 .- 2162-2027. - 9781728194271 ; 2022-August
- Conference paper (peer-reviewed)
Abstract
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- Ultrafast electron dynamics in quantum cascade lasers hold enormous potential for the implementation of intense, compact mode-locked terahertz sources, squeezed terahertz light, frequency mixers, and comb-based metrology systems. Yet the important sub-cycle dynamics have been notoriously difficult to access in operational terahertz quantum cascade lasers. Here we show the first field-resolved two-dimensional terahertz spectroscopy of a free-running quantum cascade laser, revealing its sub-cycle gain dynamics and disentangling resonantly enhanced high-order nonlinearities up to eight-wave mixing in a regime of negative absorption.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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- Riepl, J.
- Raab, J.
- Abajyan, P.
- Nong, H.
- Freeman, J. R.
- Li, L. H.
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- Linfield, E. H.
- Davies, A. G.
- Wacker, A.
- Albes, T.
- Jirauschek, C.
- Lange, C.
- Dhillon, S. S.
- Huber, R.
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- Lund University
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