OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy

| PUBLISHED BY SAS — AVAILABLE FROM SAS AND OSA

  • Vol. 38, Iss. 3 — May. 1, 1984
  • pp: 417–422

Selectively Excited Luminescence in GaAs

P. W. Bohn, T. D. Harris, R. Bhat, and H. M. Cox

Applied Spectroscopy, Vol. 38, Issue 3, pp. 417-422 (1984)


View Full Text Article

Acrobat PDF (646 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

Relaxation of donor and acceptor bound excitons, (D°, X) and (A°, X), to a final state in which the impurity atoms are left in an internally excited state has been used in several laboratories as a tool in assigning the chemical identity of the impurity species. In many specific samples, however, this excited final state emission is obscured by the free to bound (e, A°) or an interfering donor to acceptor (D°, A°) transition. Enhanced emission from excited final state relaxation processes in GaAs has been observed using selective excitation to increase the population of the appropriate initial states. Increases in emission intensity of approximately 8 for (D°, X)* and 30 for (A°, X)* were observed. The excitation wavelength dependence of the enhancement is explained in terms of instrumental parameters and free exciton absorption. The converse of the selective excitation experiment was performed in order to learn more about the mechanisms which populate the levels giving rise to the analytically interesting emission. Anti-Stokes emission was observed in the near-gap region in high purity GaAs for the first time. The emission intensity as a function of excitation wavelength data is discussed in terms of a simple parallel pathway model for upconversion. The model postulates two parallel mechanisms which may populate the emitting states, and the access to one or the other of the two is determined by the energy of the incident photon. The model explains both the absolute intensity behavior of the (D°, X) and (D+, X) emission and the intensity ratio trend as a function of excitation wavelength.

Citation
P. W. Bohn, T. D. Harris, R. Bhat, and H. M. Cox, "Selectively Excited Luminescence in GaAs," Appl. Spectrosc. 38, 417-422 (1984)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-38-3-417

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited