Confinement effects on electroreflectance spectra

Richard L. Tober; Garnett W. Bryant; Weiqi Li; Jagadeesh Pamulapati; Pallab Bhattacharya

doi:10.1117/12.137635

3 September 1992 Confinement effects on electroreflectance spectra

Richard L. Tober, Garnett W. Bryant, Weiqi Li, Jagadeesh Pamulapati, Pallab Bhattacharya

Proceedings Volume 1675, Quantum Well and Superlattice Physics IV; (1992) https://doi.org/10.1117/12.137635
Event: Semiconductors '92, 1992, Somerset, NJ, United States

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.

Citation Download Citation

Richard L. Tober, Garnett W. Bryant, Weiqi Li, Jagadeesh Pamulapati, and Pallab Bhattacharya "Confinement effects on electroreflectance spectra", Proc. SPIE 1675, Quantum Well and Superlattice Physics IV, (3 September 1992); https://doi.org/10.1117/12.137635

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