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

Zhou Wang (), Hyunwook Park, Yu Hang Lai, Junliang Xu, Cosmin I. Blaga, Fengyuan Yang, Pierre Agostini and Louis F. DiMauro ()
Additional contact information
Zhou Wang: The Ohio State University
Hyunwook Park: The Ohio State University
Yu Hang Lai: The Ohio State University
Junliang Xu: The Ohio State University
Cosmin I. Blaga: The Ohio State University
Fengyuan Yang: The Ohio State University
Pierre Agostini: The Ohio State University
Louis F. DiMauro: The Ohio State University

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract 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.

Date: 2017
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DOI: 10.1038/s41467-017-01899-1

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