TITLE

Optical absorption spectra of thin GaInNAs single quantum wells investigated by means of piezoelectric photothermal spectroscopy

AUTHOR(S)
Ikari, Tetsuo; Imai, Kenji; Ito, Atsushi; Kondow, Masahiko
PUB. DATE
May 2003
SOURCE
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Recently developed compound semiconductor GaInNAs is a promising material for optical fiber communication. The absorption spectrum of thin GaInNAs layer (10-nm thickness) was observed by using our developed piezoelectric photothermal spectroscopy. The spectra revealed a step-like density of states and exciton formation in two-dimensional discrete levels in the quantum well. Effective mass of the conduction band was estimated to be 0.05m[SUB0] by assuming that the valence-band offset was negligible. Rapid thermal annealing relaxes a lattice defects and distortions, and this results in a blueshift of the spectrum.
ACCESSION #
9697703

 

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