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Proceedings Paper

Carrier lifetimes in periodically delta-doped MQW structures
Author(s): Anders G. Larsson; Bjorn Jonsson; Ola Sjolund; Jeffrey G. Cody; Thorvald G. Andersson; S. M. Wang; Ulf Sodervall; Daniel H. Rich; Joseph L. Maserjian
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Paper Abstract

The excitation dependent carrier recombination lifetime in periodically (delta) -doped strained InGaAs/GaAs multiple quantum well structures has been investigated both experimentally and theoretically. Experimentally, we find more than six orders of magnitude increase in the lifetime over that for undoped material due to the spatial separation of photogenerated carriers. This results in strong photo-optic effects and optical nonlinearities. Calculations, on the other hand, predict intrinsic recombination lifetimes in the periodically (delta) -doped material far above those found experimentally. Using secondary ion mass spectroscopy, transmission electron microscopy, cathodoluminescence imaging, and electron beam induced absorption modulation imaging we find evidence for misfit dislocation related recombination mechanisms that limit the carrier lifetime in the strained quantum well material.

Paper Details

Date Published: 19 November 1993
PDF: 12 pages
Proc. SPIE 1985, Physical Concepts and Materials for Novel Optoelectronic Device Applications II, (19 November 1993); doi: 10.1117/12.162781
Show Author Affiliations
Anders G. Larsson, Chalmers Univ. of Technology (Sweden)
Bjorn Jonsson, Chalmers Univ. of Technology (Sweden)
Ola Sjolund, Chalmers Univ. of Technology (Sweden)
Jeffrey G. Cody, Chalmers Univ. of Technology (Sweden)
Thorvald G. Andersson, Chalmers Univ. of Technology (Sweden)
S. M. Wang, Chalmers Univ. of Technology (Sweden)
Ulf Sodervall, Chalmers Univ. of Technology (Sweden)
Daniel H. Rich, Univ. of Southern California (United States)
Joseph L. Maserjian, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 1985:
Physical Concepts and Materials for Novel Optoelectronic Device Applications II
Fabio Beltram; Erich Gornik, Editor(s)

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