Theory of strong-field injection and control of photocurrent in dielectrics and wide bandgap semiconductors

We propose a theory of optically-induced currents in dielectrics and wide-gap semiconductors exposed to a non-resonant ultrashort laser pulse with a stabilized carrier-envelope phase. In order to describe strong-field electron dynamics, equations for density matrix have been solved self-consistently...

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Bibliographic Details
Published inarXiv.org
Main Authors Stanislav Yu Kruchinin, Korbman, Michael, Yakovlev, Vladislav S
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 11.03.2013
Subjects
Charge transfer
Current carriers
Dielectric strength
Electric fields
Mathematical models
Phase control
Photoelectric effect
Photoelectric emission
Physics - Materials Science
Physics - Optics
Physics - Quantum Physics
Semiconductors
Wide bandgap semiconductors
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Summary:We propose a theory of optically-induced currents in dielectrics and wide-gap semiconductors exposed to a non-resonant ultrashort laser pulse with a stabilized carrier-envelope phase. In order to describe strong-field electron dynamics, equations for density matrix have been solved self-consistently with equations for the macroscopic electric field inside the medium, which we model by a one-dimensional potential. We provide a detailed analysis of physically important quantities (band populations, macroscopic polarization, and transferred charge), which reveals that carrier-envelope phase control of the electric current can be interpreted as a result of quantum-mechanical interference of multiphoton excitation channels. Our numerical results are in good agreement with experimental data.
ISSN:2331-8422
DOI:10.48550/arxiv.1212.4059