Optical Anisotropy of Vacancy-Ordered Ga2Se3 Grown by Molecular Beam Epitaxy

Abstract
Optical anisotropy of the vacancy-ordered Ga2Se3 grown on (100)GaP has been investigated. The electron-diffraction studies revealed that the vacancy-ordered superstructure was predominantly formed in the [011] direction when the film was grown with a VI/III ratio of 150. From the transmission spectra for light polarized toward [011] and [01], it is found that a difference in the absorption coefficients of the two polarized lights is more than 104 cm-1 at a wavelength of around 525 nm, and that the vacancy-ordered Ga2Se3 behaves like a polarizer in the selected wavelength range.