Far-infrared magneto-optical absorption of vertically aligned double dot array system

Citation
K. Fujii et al., Far-infrared magneto-optical absorption of vertically aligned double dot array system, JPN J A P 1, 40(3B), 2001, pp. 2087-2091
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
3B
Year of publication
2001
Pages
2087 - 2091
Database
ISI
SICI code
0021-4922(200103)40:3B<2087:FMAOVA>2.0.ZU;2-2
Abstract
We propose the optical control of the coupling between vertically aligned d ouble dots. The coupling of the dots depends on the distance between the do uble dots and affects the strength of the electron-electron interaction in the dots. For this purpose, we fabricated a vertically aligned double dot a rray using a modulation-doped GaAs/AlGaAs single quantum well with two inte rfaces. Far-infrared magneto-optical absorption measurements of the double dot array system were carried out under photoexcitation. We observed a peak shift of the electron transition only in a dot located near the top interf ace. The peak shift includes the change in the coupling as well as the chan ge in the confinement potential by the photoexcitation. This is evidence of the potential modulation by light which changes the coupling between the t wo dots. This indicates the possibility of the optical control of the coupl ing.