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Self-limited underdense microplasmas in bulk silicon induced by ultrashort laser pulses

Mouskeftaras, Alexandros; Rode, Andrei V.; Clady, Raphaël; Sentis, Marc; Utéza, Olivier; Grojo, David


Two-photon ionization by focused femtosecond laser pulses initiates the development of micrometer-scale plasmas in the bulk of silicon. Using pump-and-probe transmission microscopy with infrared light, we investigate the space-time characteristics of these plasmas for laser intensities up to 10¹²W/cm². The measurements reveal a self-limitation of the excitation at a maximum free-carrier density of ffi1019 cm3, which is more than one order of magnitude below the threshold for permanent...[Show more]

CollectionsANU Research Publications
Date published: 2014-11-10
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.4901528


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