Please use this identifier to cite or link to this item:
Title: Enhancement of exciton binding energies in ZnO/ZnMgO multi-quantum wells
Authors: Makino, T.
Segawa, Y.
Kawasaki, M.
Ohtomo, A.
Tamura, K.
Koinuma, H.
Sun, Handong
Keywords: DRNTU::Science::Physics::Optics and light
Issue Date: 2002
Source: Sun, H. D., Makino, T., Segawa, Y., Kawasaki, M., Ohtomo, A., Tamura, K., et al. (2002). Enhancement of exciton binding energies in ZnO/ZnMgO multi-quantum wells. Journal of Applied Physics., 91(4), 1993-1997.
Series/Report no.: Journal of applied physics
Abstract: The effect of confinement on the exciton binding energies has been systematically investigated for two series of ZnO/ZnMgO multiquantum wells with various well widths and barrier heights. The exciton binding energies were extracted from the energy difference between the stimulated emission band induced by inelastic exciton–exciton scattering and the free exciton absorption band. The binding energies of excitons are found to be sensitively dependent on the well widths. The experimental results of the well width dependence of binding energies are in good agreement with Coli and Bajaj’s theoretical calculations for these structures [G. Coli and K. K. Bajaj, Appl. Phys. Lett. 78, 2861 (2001)]. The remarkable reduction in coupling strength between excitons and longitudinal optical phonons is closely correlated with the enhancement of the exciton binding energy, indicating that the stability of excitons is greatly increased by the enhancement of exciton binding energy in quantum wells.
ISSN: 0021-8979
DOI: 10.1063/1.1445280
Rights: Journal of Applied Physics © 2002 American Institute of Physics. The journal's website is located at
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
JAP91-1993-Eb-enhanceZnO-02.pdf64.38 kBAdobe PDFThumbnail

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.