Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Spatially localized band-gap renormalization and band-filling effects in three growth-interrupted multiple asymmetric coupled narrow quantum wells

Not Accessible

Your library or personal account may give you access

Abstract

For the first time to our knowledge, we have observed a large excitonic linewidth broadening at low temperatures in three growth-interrupted asymmetric coupled GaAs/Al0.3Ga0.7As narrow quantum wells as the irradiance increases. We attribute this broadening to the decrease of the exciton binding energy that results from spatially localized band-gap renormalization. We also observed the stepwise saturation of the photoluminescence emission peaks as irradiance increases. We attribute this saturation to the result of spatially localized band filling. Based on time-resolved photoluminescence measurements, we have determined the nature of the recombination processes. We have also determined the exciton densities. In both undoped and modulation-doped samples, the small interface island area that results from growth interruption allows us to generate a large carrier density in the islands; both band-gap renormalization and band-filling effects become stronger even at low irradiances. When the temperature is higher than the transition temperature, the free-carrier recombination dominates the photoluminescence spectrum. The band-gap renormalization then results in a red shift of the photoluminescence emissions.

© 1996 Optical Society of America

Full Article  |  PDF Article
More Like This
Radiative recombination processes in wide-band-gap II–VI quantum wells: the interplay between excitons and free carriers

R. Cingolani, L. Calcagnile, G. Colí, R. Rinaldi, M. Lomoscolo, M. DiDio, A. Franciosi, L. Vanzetti, G. C. LaRocca, and D. Campi
J. Opt. Soc. Am. B 13(6) 1268-1277 (1996)

Photoluminescence from colloidal CdS-CdSe-CdS quantum wells

Jianfeng Xu, David Battaglia, Xiaogang Peng, and Min Xiao
J. Opt. Soc. Am. B 22(5) 1112-1116 (2005)

Dynamics of doubly resonant Raman scattering and resonant luminescence in ultrathin InAs/GaAs quantum wells

J. Brübach, J. E. M. Haverkort, J. H. Wolter, P. D. Wang, N. N. Ledentsov, C. M. Sotomayor Torres, A. E. Zhukov, P. S. Kop’ev, and V. M. Ustinov
J. Opt. Soc. Am. B 13(6) 1224-1231 (1996)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved