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Proceedings Paper

2D THz spectroscopic investigation of ballistic conduction-band electron dynamics in InSb (Conference Presentation)
Author(s): Sarah Houver; Lucas Huber; Matteo Savoini; Elsa Abreu; Steven L. Johnson

Paper Abstract

In semiconductors and semimetals, strong THz electric fields can induce a controlled coherent motion of the electrons in the conduction band, via ballistic excitation. In the first picoseconds after THz excitation, the nonlinearities induced by this coherent excitation prevail before more incoherent high field effects start dominating the nonlinear response. Disentangling these different nonlinear contributions with 2D THz spectroscopy, we follow the trajectory of the out-of-equilibrium electron population in low-bandgap semiconductor InSb and. We then extract information on the conduction band curvature and evaluate its anharmonicity and its anisotropy, close to the Gamma-point.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780O (10 March 2020); doi: 10.1117/12.2543969
Show Author Affiliations
Sarah Houver, ETH Zurich (Switzerland)
Lucas Huber, ETH Zurich (Switzerland)
Matteo Savoini, ETH Zurich (Switzerland)
Elsa Abreu, ETH Zurich (Switzerland)
Steven L. Johnson, ETH Zürich (Switzerland)

Published in SPIE Proceedings Vol. 11278:
Ultrafast Phenomena and Nanophotonics XXIV
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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