Laser-driven electron oscillations as a mechanism of ultrafast conversion of few-cycle laser pulses to photocurrent in semiconductor nanostructures

Vitaly Gruzdev; Olga Sergaeva

doi:10.1117/12.2583495

5 March 2021 Laser-driven electron oscillations as a mechanism of ultrafast conversion of few-cycle laser pulses to photocurrent in semiconductor nanostructures

Vitaly Gruzdev, Olga Sergaeva

Author Affiliations +

Proceedings Volume 11684, Ultrafast Phenomena and Nanophotonics XXV; 116841H (2021) https://doi.org/10.1117/12.2583495
Event: SPIE OPTO, 2021, Online Only

Abstract

We consider intra-band electron oscillations driven by intense few-cycle laser pulses carrying as many as 15 cycles and show feasibility of generation of femtosecond photocurrent pulses in semiconductors without external bias. The mechanism of this phenomenon is attributed to generation of non-zero net momentum within each oscillation cycle due to sub-cycle violation of symmetry of momentum departures. Combined with laser-induced increase of free-electron population, it induces photocurrent pulses. Reported analytical quantum-mechanical model delivers scaling of peak photocurrent with material and laser parameters. Based on it, we discuss the type of semiconductor nanostructures most favorable for detection of that phenomenon.

Conference Presentation

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Vitaly Gruzdev and Olga Sergaeva "Laser-driven electron oscillations as a mechanism of ultrafast conversion of few-cycle laser pulses to photocurrent in semiconductor nanostructures", Proc. SPIE 11684, Ultrafast Phenomena and Nanophotonics XXV, 116841H (5 March 2021); https://doi.org/10.1117/12.2583495

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