Ultrafast plasma mirrors in the microwave range

Braggio, C. (2015) Ultrafast plasma mirrors in the microwave range. Il nuovo cimento C, 38 (2). pp. 1-7. ISSN 1826-9885

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An experimental and numerical study of a laser-driven semiconductor mirror is detailed, which addresses two questions: whether a laser-induced semiconductor mirror is as good as a metal mirror in the microwave range and if so, at which value of photoconductivity such a metallic behavior sets in. A novel time-frequency analysis is used to investigate the properties of the mirror, based on measurements of average power transmitted through a microwave resonator. We demonstrate that a good macroscopic reflector can be realized through a semiconductor plasma, whose conductivity is orders of magnitude smaller than the one of a good metal. This non-trivial result is relevant for applications in which the mirror is requested to be switched on and off at a frequency of several gigahertz.

Item Type: Article
Uncontrolled Keywords: Optical properties of bulk materials and thin films ; Photoconduction and photovoltaic effects ; Radiowave and microwave (including millimeter wave) technology ; Laboratory procedures
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 27 May 2020 15:28
Last Modified: 27 May 2020 15:28
URI: http://eprints.bice.rm.cnr.it/id/eprint/19031

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