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5 March 2021 Oscillatory mechanism of ultrafast bias-free conversion of few-cycle laser pulses to photocurrent and its influence on laser processing of non-metal materials
Vitaly E. Gruzdev, Olga Sergaeva
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Proceedings Volume 11676, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI; 1167614 (2021) https://doi.org/10.1117/12.2583467
Event: SPIE LASE, 2021, Online Only
Abstract
By considering intra-band electron oscillations driven by intense few-cycle laser pulses, we show feasibility of generation of femtosecond photocurrent pulses in non-metal solids without external bias by laser pulses carrying as many as 15 cycles. The physical mechanism of the photocurrent is attributed to non-zero cycle-averaged momentum of the oscillating electrons produced by violation of sub-cycle symmetry of momentum departures. Reported analytical model delivers scaling of peak photocurrent (total charge) with material and laser parameters including carrier-envelope phase. We discuss applications of this novel ultrafast electro-optic effect in temporal shaping of ultrashort pulses and novel regimes of material processing.
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Vitaly E. Gruzdev and Olga Sergaeva "Oscillatory mechanism of ultrafast bias-free conversion of few-cycle laser pulses to photocurrent and its influence on laser processing of non-metal materials", Proc. SPIE 11676, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI, 1167614 (5 March 2021); https://doi.org/10.1117/12.2583467
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KEYWORDS
Ultrafast phenomena
Nonmetals
Solids
Femtosecond phenomena
Materials processing
Photonics
Process control
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