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Title: Excitons Bound to Nitrogen Pairs in GaAs as Seen by Photoluminescence of High Spectral and Spatial Resolution

Abstract

High resolution photoluminescence (PL) spectroscopy was performed on high quality bulk GaAs, lightly doped with the nitrogen isoelectronic impurity. The shallowest nitrogen pair bound exciton center labeled as X{sub 1} revealed a total of six transitions. The photoluminescence lines from a small ensemble of nitrogen centers showed polarization dependent intensity. High spectral resolution PL spectroscopy was combined with confocal spectroscopy experiments performed on a GaAs:N/AlGaAs heterostructure. The high spatial resolution achieved by this technique enables us to localize and examine individual nitrogen bound excitons. Similar spectral structure and polarization dependence was observed for individual N-pair centers in GaAs. Both techniques support the C{sub 2v} symmetry of such isoelectronic impurity centers. The comparison between the PL spectra from an ensemble of nitrogen pairs and individual centers demonstrate the ability of the single impurity technique to lift the orientational degeneracy.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
982274
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 76; Journal Issue: 12, 2007; Related Information: Article No. 125209
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELEVATORS; EXCITONS; NITROGEN; PHOTOLUMINESCENCE; POLARIZATION; RESOLUTION; SPATIAL RESOLUTION; SPECTRA; SPECTROSCOPY; SUPPORTS; SYMMETRY; Materials Science and Semiconductors; Solid State Spectroscopy

Citation Formats

Karaiskaj, D., Mascarenhas, A., Klem, J. F., Volz, K., Stolz, W., Adamcyk, M., and Tiedje, T. Excitons Bound to Nitrogen Pairs in GaAs as Seen by Photoluminescence of High Spectral and Spatial Resolution. United States: N. p., 2007. Web. doi:10.1103/PhysRevB.76.125209.
Karaiskaj, D., Mascarenhas, A., Klem, J. F., Volz, K., Stolz, W., Adamcyk, M., & Tiedje, T. Excitons Bound to Nitrogen Pairs in GaAs as Seen by Photoluminescence of High Spectral and Spatial Resolution. United States. doi:10.1103/PhysRevB.76.125209.
Karaiskaj, D., Mascarenhas, A., Klem, J. F., Volz, K., Stolz, W., Adamcyk, M., and Tiedje, T. Mon . "Excitons Bound to Nitrogen Pairs in GaAs as Seen by Photoluminescence of High Spectral and Spatial Resolution". United States. doi:10.1103/PhysRevB.76.125209.
@article{osti_982274,
title = {Excitons Bound to Nitrogen Pairs in GaAs as Seen by Photoluminescence of High Spectral and Spatial Resolution},
author = {Karaiskaj, D. and Mascarenhas, A. and Klem, J. F. and Volz, K. and Stolz, W. and Adamcyk, M. and Tiedje, T.},
abstractNote = {High resolution photoluminescence (PL) spectroscopy was performed on high quality bulk GaAs, lightly doped with the nitrogen isoelectronic impurity. The shallowest nitrogen pair bound exciton center labeled as X{sub 1} revealed a total of six transitions. The photoluminescence lines from a small ensemble of nitrogen centers showed polarization dependent intensity. High spectral resolution PL spectroscopy was combined with confocal spectroscopy experiments performed on a GaAs:N/AlGaAs heterostructure. The high spatial resolution achieved by this technique enables us to localize and examine individual nitrogen bound excitons. Similar spectral structure and polarization dependence was observed for individual N-pair centers in GaAs. Both techniques support the C{sub 2v} symmetry of such isoelectronic impurity centers. The comparison between the PL spectra from an ensemble of nitrogen pairs and individual centers demonstrate the ability of the single impurity technique to lift the orientational degeneracy.},
doi = {10.1103/PhysRevB.76.125209},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 12, 2007,
volume = 76,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}