Determination of the direct band-gap energy of InAlAs matched to InP by photoluminescence excitation spectroscopy

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Title:	Determination of the direct band-gap energy of InAlAs matched to InP by photoluminescence excitation spectroscopy
Author:	Roura Grabulosa, Pere; López de Miguel, Manuel; Cornet i Calveras, Albert; Morante i Lleonart, Joan Ramon
Other authors:	Universitat de Barcelona
Abstract:	A series of InxAl12xAs samples (0.51,x,0.55) coherently grown on InP was studied in order to measure the band-gap energy of the lattice matched composition. As the substrate is opaque to the relevant photon energies, a method is developed to calculate the optical absorption coefficient from the photoluminescence excitation spectra. The effect of strain on the band-gap energy has been taken into account. For x50.532, at 14 K we have obtained Eg05154966 meV. © 1997 American Institute of Physics.
Subject(s):	-Microscòpia electrònica -Pel·lícules fines -Electron microscopy -Thin films
Rights:	(c) American Institute of Physics, 1997
Document type:	Article Article - Published version
Published by:	American Institute of Physics
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