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Proceedings Paper

Confinement effects on electroreflectance spectra
Author(s): Richard L. Tober; Garnett W. Bryant; Weiqi Li; Jagadeesh Pamulapati; Pallab Bhattacharya
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Paper Abstract

Electric field modulated spectra obtained from heterojunction samples have oscillatory structure that depends not only on the magnitude of the applied field but on confinement near the heterojunctions as well. Experiments indicate two field regions, each with distinct spectral lineshapes. Spectra obtained with relatively small dc electric fields have rapid oscillatory structure whose period does not significantly depend on the magnitude of the applied field. In contrast, the period of the bulk Franz-Keldysh oscillations that emerge with large field does. Theoretical calculations suggest that a crossover from the low to high field behavior occurs when carriers can freely move through the crystal.

Paper Details

Date Published: 3 September 1992
PDF: 7 pages
Proc. SPIE 1675, Quantum Well and Superlattice Physics IV, (3 September 1992); doi: 10.1117/12.137635
Show Author Affiliations
Richard L. Tober, Harry Diamond Labs. (United States)
Garnett W. Bryant, Harry Diamond Labs. (United States)
Weiqi Li, Univ. of Michigan (United States)
Jagadeesh Pamulapati, Univ. of Michigan (United States)
Pallab Bhattacharya, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 1675:
Quantum Well and Superlattice Physics IV
Gottfried H. Doehler; Emil S. Koteles, Editor(s)

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