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Exciton-phonon interaction in fractional dimensional space

Thilagam, A. (1997). Exciton-phonon interaction in fractional dimensional space. Physical Review B (Condensed Matter and Materials Physics),56(15):9798-9804.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 28 times in Scopus Article | Citations

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Title Exciton-phonon interaction in fractional dimensional space
Author Thilagam, A.
Journal Name Physical Review B (Condensed Matter and Materials Physics)
Publication Date 1997
Volume Number 56
Issue Number 15
ISSN 0163-1829   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0000857981
Start Page 9798
End Page 9804
Total Pages 7
Place of Publication USA
Publisher American Physical Society
HERDC Category C1 - Journal Article (DEST)
Abstract Explicit analytical expressions of Frohlich-like Hamiltonians for the interaction between an exciton and optical phonons in fractional-dimensional space are derived for two illustrative cases of 1s→1s and 1s→2p exciton scattering. The improved Hamiltonians incorporate any modification in the strength of the exciton-optical-phonon interactions due to confinement, by means of a single parameter α, a measure of the dimensionality of the confined system. The Hamiltonians also incorporate the penetration of electron and hole wave functions into the barrier region, an effect which becomes increasingly significant for narrow well widths. The flexibility of the derived Hamiltonians are shown in the ease of systematic study of exciton linewidths in GaAs/AlxGa1-xAs quantum wells. Results show the high sensitivity of the excitonic linewidths to α due to interactions with short-wavelength optical phonons.
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