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Proceedings Paper

Transfer efficiency of guided electron waves in coupled quantum wells
Author(s): Rui Q. Yang; C.H. Thompson Lin; Shin Shem Pei
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Paper Abstract

Theoretical formulations based on a coupled-mode theory and a supermode theory are developed for discussing transfer efficiency of guided electron waves in coupled quantum well structures. We apply a coupled-mode theory to electron waveguide couplers in the weak coupling regime and show that the transfer efficiency will not be greater than 100%. In the strong coupling regime, we can appropriately handle the electron waves in coupled quantum well waveguide structures by introducing a supermode theory, and demonstrate that the transfer efficiency is always less than 100%. We discuss the underlying physics in an attempt to gain an insight into the transfer efficiency related issues. Calculations for specific semiconductor quantum well structures such as GaAs/AlGaAs quantum wells are given for quantitative illustrations.

Paper Details

Date Published: 19 April 1996
PDF: 10 pages
Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); doi: 10.1117/12.238394
Show Author Affiliations
Rui Q. Yang, Univ. of Houston (United States)
C.H. Thompson Lin, Univ. of Houston (United States)
Shin Shem Pei, Univ. of Houston (United States)


Published in SPIE Proceedings Vol. 2694:
Quantum Well and Superlattice Physics VI
Gottfried H. Doehler; Theodore S. Moise, Editor(s)

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