The optical spectra of a set of high quality quantum wells, with well characterized structural parameters, are presented here. We propose a quantitative calculation for the measured emission energies which takes into account the spontaneous and piezoelectric polarization fields and the field-screening effect due to electron-hole photogenerated pairs; such an effect is especially effective in wide QW samples which in fact behave like mesoscopic capacitors. (C) 2001 Elsevier Science B.V. All rights reserved
Charge storage and screening of the internal field in GaN/AlGaN quantum wells
Lomascolo M;Passaseo A;Napolitani E;
2001
Abstract
The optical spectra of a set of high quality quantum wells, with well characterized structural parameters, are presented here. We propose a quantitative calculation for the measured emission energies which takes into account the spontaneous and piezoelectric polarization fields and the field-screening effect due to electron-hole photogenerated pairs; such an effect is especially effective in wide QW samples which in fact behave like mesoscopic capacitors. (C) 2001 Elsevier Science B.V. All rights reservedFile in questo prodotto:
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