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arXiv · 1804.09030

Ensemble properties of charge carriers injected by an ultrashort laser pulse

Muhammad Qasim·Michael S. Wismer·Manoram Agarwal·Vladislav S. Yakovlev
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Abstract

The average effective mass of charge carriers produced by an intense ultrashort laser pulse in a transparent solid increases significantly as the excitation mechanism changes from multiphoton transitions to interband tunneling. We theoretically investigate this phenomenon for several dielectrics and semiconductors. For diamond as a representative dielectric, we present a detailed analysis of the laser-induced change of optical properties. When the concentration of free carriers is high, we find that the average effective mass controls not only the intraband charge-carrier transport but also the interband contributions to the optical response. We observe that the excitation-induced birefringence is particularly large for parameters where the plasma response compensates for the linear response of an unperturbed solid.

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Muhammad Qasim, Michael S. Wismer, Manoram Agarwal, Vladislav S. Yakovlev. 2018-04-21. Ensemble properties of charge carriers injected by an ultrashort laser pulse. https://doi.org/10.1103/physrevb.98.214304

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