Transfer efficiency of guided electron waves in coupled quantum wells

Rui Q. Yang; C.H. Thompson Lin; Shin Shem Pei

doi:10.1117/12.238394

19 April 1996 Transfer efficiency of guided electron waves in coupled quantum wells

Rui Q. Yang, C.H. Thompson Lin, Shin Shem Pei

Proceedings Volume 2694, Quantum Well and Superlattice Physics VI; (1996) https://doi.org/10.1117/12.238394
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Rui Q. Yang, C.H. Thompson Lin, and Shin Shem Pei "Transfer efficiency of guided electron waves in coupled quantum wells", Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); https://doi.org/10.1117/12.238394

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