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Proceedings Paper

Real-space transfer of photoexcited electrons in type-II superlattices via optical-phonon emission
Author(s): M. U. Erdogan; V. Sankaran; Ki Wook Kim; Michael A. Stroscio; Gerald J. Iafrate
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Paper Abstract

The (Gamma) -X scattering rate of electrons in type-II superlattices by optical-phonon emission is calculated. The tight binding method for electronic band structure and the dielectric continuum model for phonons are used. The relative strength of scattering due to different phonon modes is examined for varying superlattice dimensions. The scattering rate is highest when the energy separation between the (Gamma) and X levels is smallest, and decreases quickly as the separation increases. It is found that the strongest scattering rate is due to the emission of AlAs confined modes. Changing of parity with layer thickness and its effect on scattering are discussed.

Paper Details

Date Published: 30 June 1994
PDF: 8 pages
Proc. SPIE 2146, Physics and Simulation of Optoelectronic Devices II, (30 June 1994); doi: 10.1117/12.178540
Show Author Affiliations
M. U. Erdogan, North Carolina State Univ. (United States)
V. Sankaran, North Carolina State Univ. (United States)
Ki Wook Kim, North Carolina State Univ. (United States)
Michael A. Stroscio, U.S. Army Research Office (United States)
Gerald J. Iafrate, U.S. Army Research Office (United States)


Published in SPIE Proceedings Vol. 2146:
Physics and Simulation of Optoelectronic Devices II
Weng W. Chow; Marek Osinski, Editor(s)

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