In-plane optical anisotropy in GaAsN/GaAs single-quantum well investigated by reflectance-difference spectroscopy.

Authors :: Yu, J. L.
Chen, Y. H.
Ye, X. L.
Jiang, C. Y.
Jia, C. H.
Source :: Journal of Applied Physics; Jul2010, Vol. 108 Issue 1, p013516, 5p, 1 Chart, 3 Graphs
Publication Year :: 2010
Abstract: The interface properties of GaN<subscript>x</subscript>As<subscript>1-x</subscript>/GaAs single-quantum well is investigated at 80 K by reflectance difference spectroscopy. Strong in-plane optical anisotropies (IPOA) are observed. Numerical calculations based on a 4 band K·P Hamiltonian are performed to analyze the origin of the optical anisotropy. It is found that the IPOA can be mainly attributed to anisotropic strain effect, which increases with the concentration of nitrogen. The origin of the strain component ε<subscript>xy</subscript> is also discussed. [ABSTRACT FROM AUTHOR]

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