2020/01/26 by Fabian Langer, Yen‐Po Liu, Langer, Fabian +20 · 2 citations
Neuroscience · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Laser-Matter Interactions and Applications #Optics (physics.optics) #Photoreceptor and optogenetics research
paper · pdf · doi:10.48550/arxiv.2001.09433
openalex publication_date 2020/01/26 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
When an intense, few-cycle light pulse impinges on a dielectric or\nsemiconductor material, the electric field will interact nonlinearly with the\nsolid, driving a coherent current. An asymmetry of the ultrashort,\ncarrier-envelope-phase-stable waveform results in a net transfer of charge,\nwhich can be measured by macroscopic electric contact leads. This effect has\nbeen pioneered with extremely short, single-cycle laser pulses at low\nrepetition rate, thus limiting the applicability of its potential for ultrafast\nelectronics. We investigate lightwave-driven currents in gallium nitride using\nfew-cycle laser pulses of nearly twice the duration and at a repetition rate\ntwo orders of magnitude higher than in previous work. We successfully simulate\nour experimental data with a theoretical model based on interfering multiphoton\ntransitions, using the exact laser pulse shape retrieved from dispersion-scan\nmeasurements. Substantially increasing the repetition rate and relaxing the\nconstraint on the pulse duration marks an important step forward towards\napplications of lightwave-driven electronics.\n