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Exciton Dynamics in GaAs Quantum Wells by Thiyagarajan Annamalai is a document available to read on EtoBox.
In GaAs, the exciton binding energy is comparable to thermal broadening, so excitons dissociate quickly at room temperature and are difficult to detect. In quantum wells with thick barriers, electrons and holes are confined, increasing their wave function overlap and oscillator strength of inter-band transitions seen even at room temperature. Distinct resonances are seen for heavy-hole and light-hole transitions due to differences in hole masses. Penetration of the exciton wave function into barriers means
- Author
- Thiyagarajan Annamalai
- Language
- EN