Excitonic relaxation channels in double quantum wells

P. Harrison, T. Stirner, W. E. Hagston, J. E. Nicholls

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The purpose of this paper is to give a theoretical interpretation of the experimental results of Goede et al. (Superlatt. Microstruct. 12 363 (1992)) describing the relaxation of heavy-hole excitons in asymmetric double quantum well systems based on the semimagnetic CdTe-CdMnTe system. In order to explain certain spectroscopic data, Goede et al. had to invoke excitonic tunnelling between the wells for systems with narrow (25 AA) inner barriers. In this work it is shown that the experimental results imply tunnelling via a 'crossed' excitonic state with the electron and hole localized in different wells. The experimental observations are interpreted in terms of a model involving phonon scattering and calculations of intersubband relaxation rates via confined phonon modes are shown to be in agreement with experimental observations.

Original languageEnglish
Article number093
Pages (from-to)743-745
Number of pages3
JournalSemiconductor Science and Technology
Issue number5 S
Publication statusPublished - 1 May 1994
Externally publishedYes
Event8th International Conference on Hot Carriers in Semiconductors - Oxford, United Kingdom
Duration: 16 Aug 199320 Aug 1993
Conference number: 8


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