THz parametric gain in semiconductor superlattices in the absence of electric domains

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We theoretically show that conditions for THz gain and conditions for formation of destructive electric domains in semiconductor superlattices are fairly different in the case of parametric generation and amplification. Action of an unbiased high-frequency electric field on a superlattice causes a periodic variation of energy and effective mass of miniband electrons. This parametric effect can result in a significant gain at some even harmonic of the pump frequency without formation of electric domains and corruption from pump harmonics.
4 pages, 3 figures. Accepted to Appl. Phys. Lett

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/114798

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0608704
 http://arxiv.org/abs/cond-mat/0608704
 Applied Physics Letters 89, 132105 (2006)
 doi:10.1063/1.2357579

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