Few-cycle lightwave-driven currents in a semiconductor at high repetition rate

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Few-cycle lightwave-driven currents in a semiconductor at high repetition rate. / Langer, Fabian; Liu, Yen Po; Ren, Zhe; Flodgren, Vidar; Guo, Chen; Vogelsang, Jan; Mikaelsson, Sara; Sytcevich, Ivan; Ahrens, Jan; L’Huillier, Anne; Arnold, Cord L.; Mikkelsen, Anders.

I: Optica, Vol. 7, Nr. 4, 01.04.2020, s. 276-279.

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T1 - Few-cycle lightwave-driven currents in a semiconductor at high repetition rate

AU - Langer, Fabian

AU - Liu, Yen Po

AU - Ren, Zhe

AU - Flodgren, Vidar

AU - Guo, Chen

AU - Vogelsang, Jan

AU - Mikaelsson, Sara

AU - Sytcevich, Ivan

AU - Ahrens, Jan

AU - L’Huillier, Anne

AU - Arnold, Cord L.

AU - Mikkelsen, Anders

PY - 2020/4/1

Y1 - 2020/4/1

N2 - When an intense, few-cycle light pulse impinges on a dielectric or semiconductor material, the electric field will interact nonlinearly with the solid, driving a coherent current. An asymmetry of the ultrashort, carrier-envelope-phase-stable waveform results in a net transfer of charge, which can be measured by macroscopic electric contact leads. This effect has been pioneered with extremely short, single-cycle laser pulses at low repetition rate, thus limiting the applicability of its potential for ultrafast electronics. We investigate lightwave-driven currents in gallium nitride using few-cycle laser pulses of nearly twice the duration and at a repetition rate 2 orders of magnitude higher than in previous work. We successfully simulate our experimental data with a theoretical model based on interfering multiphoton transitions, using the exact laser pulse shape retrieved from dispersion-scan measurements. Substantially increasing the repetition rate and relaxing the constraint on the pulse duration marks an important step forward toward applications of controlling currents with light.

AB - When an intense, few-cycle light pulse impinges on a dielectric or semiconductor material, the electric field will interact nonlinearly with the solid, driving a coherent current. An asymmetry of the ultrashort, carrier-envelope-phase-stable waveform results in a net transfer of charge, which can be measured by macroscopic electric contact leads. This effect has been pioneered with extremely short, single-cycle laser pulses at low repetition rate, thus limiting the applicability of its potential for ultrafast electronics. We investigate lightwave-driven currents in gallium nitride using few-cycle laser pulses of nearly twice the duration and at a repetition rate 2 orders of magnitude higher than in previous work. We successfully simulate our experimental data with a theoretical model based on interfering multiphoton transitions, using the exact laser pulse shape retrieved from dispersion-scan measurements. Substantially increasing the repetition rate and relaxing the constraint on the pulse duration marks an important step forward toward applications of controlling currents with light.

U2 - 10.1364/OPTICA.389150

DO - 10.1364/OPTICA.389150

M3 - Article

VL - 7

SP - 276

EP - 279

JO - Optica

JF - Optica

SN - 2334-2536

IS - 4

ER -