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THz intersubband dynamics in p-Si/SiGe quantum well structures

Lookup NU author(s): Dr David Robbins

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Abstract

We report time-resolved (ps) studies of the dynamics of intersubband transitions in p-Si/SiGe multi-quantum well structures in the FIR regime, ℏω<ℏωLO, utilizing the Dutch free electron laser, FELIX. The calculated scattering rates have been included in a rate equation model of the transient FIR intersubband absorption, and show excellent agreement with our degenerate pump–probe spectroscopy measurements where after an initial rise time determined by the resolution of our measurement we determine a decay time of . This is found to be approximately constant in the temperature range from 4 to , in good agreement with the predictions of alloy scattering in the Si0.7Ge0.3 wells.

Publication metadata

Author(s): Robbins DJ; Pidgeon CR; Murzyn P; Wells J-PR; Bradley IV; Ikonic Z; Kelsall RW; Harrison P; Lynch SA; Paul DJ; Arnone DD; Norris D; Cullis AG

Publication type: Article

Publication status: Published

Journal: Physica E

Year: 2002

Volume: 13

Issue: 2-4

Pages: 904-907

ISSN (print): 1386-9477

ISSN (electronic): 1873-1759

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/S1386-9477(02)00231-X

DOI: 10.1016/S1386-9477(02)00231-X

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