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The roles of photo-carrier doping and driving wavelength in high harmonic generation from a semiconductor

Zhou WangDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USA. [email protected]Hyunwook ParkDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USAYu Hang LaiDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USAJunliang XuDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USACosmin I. BlagaDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USAFengyuan YangDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USAPierre AgostiniDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USALouis F. DiMauroDepartment of Physics, The Ohio State University, Columbus, OH, 43210, USA. [email protected]

2017en

ABI

Annotatsiya

High-harmonic generation from gases produces attosecond bursts and enables high-harmonic spectroscopy to explore electron dynamics in atoms and molecules. Recently, high-harmonic generation from solids has been reported, resulting in novel phenomena and unique control of the emission, absent in gas-phase media. Here we investigate high harmonics from semiconductors with controllable induced photo-carrier densities, as well as the driving wavelengths. We demonstrate that the dominant generation mechanism can be identified by monitoring the variation of the harmonic spectra with the carrier density. Moreover, the harmonic spectral dependence on the driving wavelength is reported and a different dependence from the well-known one in gas-phase media is observed. Our study provides distinct control of the harmonic process from semiconductors, sheds light on the underlying mechanism and helps optimize the harmonic properties for future solid-state attosecond light sources.

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Identifikatorlar

DOI: 10.1038/s41467-017-01899-1

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