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Type: 
Journal
Description: 
In this paper we present a detailed study of the intersubband absorption occurring between electron states confined in strained Ge multi-quantum wells as a function of the temperature. The high structural quality of the samples is reflected by the very narrow absorption line-shape constant with temperature. We observe a temperature driven charge transfer occurring between the ground and the first excited subband which, in turn, induces a change in the depolarization shift and consequently in the energy of the absorbance peak. The experimental observations are well accounted for by a multi-valley k⋅ p model.
Publisher: 
IOP Publishing
Publication date: 
23 Oct 2012
Authors: 

M De Seta, G Capellini, M Ortolani, Michele Virgilio, Giuseppe Grosso, G Nicotra, P Zaumseil

Biblio References: 
Volume: 23 Issue: 46 Pages: 465708
Origin: 
Nanotechnology