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Proceedings Paper

Interdiffusion effect on the gain of InGaAs/InP quantum well laser
Author(s): Michael C. Y. Chan; Kwok-Sum Chan; E. Herbert Li
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Paper Abstract

Lattice-matched In0.53Ga0.47As/InP quantum well (QW) structures are of considerable interest in photonic application since they enabled device operation in the 1.3micrometers to 1.55micrometers wavelength range which is of importance for optical communication systems. The process of interdiffusion modifies the as-grown square QW to a graded QW which alter the subband structure and optical properties of the QW. Thus it provides a useful tool for bandstructure engineering. The interdiffusion process of InGaAs/InP QW provides more degrees of freedom than AlGaAs/GaAs QW system since interdiffusion can occur for group-III, group-V, and groups III plus V together. These are determined by the temperature and chemical environment used during annealing of the QW structure. The effect of interdiffusion on the laser performances of InGaAs/InP QWs is also studied based on these different types of diffusion processes. It is found that the operating wavelength shows both a red shift and a blue shift depending on the types of diffusion process. It is also found that group-III interdiffusion gives the best performance of InGaAs/InP QW laser when comparing to the other tow types of interdiffusion in terms of a smaller threshold carrier density.

Paper Details

Date Published: 24 September 1996
PDF: 11 pages
Proc. SPIE 2886, Semiconductor Lasers II, (24 September 1996); doi: 10.1117/12.251880
Show Author Affiliations
Michael C. Y. Chan, Univ. of Hong Kong (Hong Kong China)
Kwok-Sum Chan, City Univ. of Hong Kong (Hong Kong China)
E. Herbert Li, Univ. of Hong Kong (Hong Kong China)

Published in SPIE Proceedings Vol. 2886:
Semiconductor Lasers II
Siamak Forouhar; Qiming Wang, Editor(s)

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