Intersubband transitions in ZnO multiple quantum wells

M. Belmoubarik; K. Ohtani; H. Ohno

doi:10.1063/1.2926673

Intersubband transitions in ZnO multiple quantum wells

M. Belmoubarik, K. Ohtani, H. Ohno

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Abstract

Intersubband transitions in ZnOMgZnO multiple quantum wells (MQWs) are investigated by a photocurrent spectroscopy. Photocurrent peaks are observed in the energy range from 300 to 400 meV and shifted to higher energy by reducing the ZnO well thickness. Polarization-resolved photocurrent spectra show that these peaks are observed when the polarization of incident lights is TM mode, following the intersubband selection rule. Calculation indicates that the photocurrent peaks are the intersubband transition from the first to the third subband in ZnOMgZnO MQWs.

Original language	English
Article number	191906
Journal	Applied Physics Letters
Volume	92
Issue number	19
DOIs	https://doi.org/10.1063/1.2926673
Publication status	Published - 2008 May 27

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AB - Intersubband transitions in ZnOMgZnO multiple quantum wells (MQWs) are investigated by a photocurrent spectroscopy. Photocurrent peaks are observed in the energy range from 300 to 400 meV and shifted to higher energy by reducing the ZnO well thickness. Polarization-resolved photocurrent spectra show that these peaks are observed when the polarization of incident lights is TM mode, following the intersubband selection rule. Calculation indicates that the photocurrent peaks are the intersubband transition from the first to the third subband in ZnOMgZnO MQWs.

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