Tatekazu Masui

TL;DR: In this paper, the polarized transmittance and reflectance spectra of β-Ga2O3 crystals are investigated, and the data are interpreted in terms of the monoclinic crystal band structure.

TL;DR: In this paper, temperature-dependent cathodoluminescence spectra were measured from (001) unintentionally doped, (100) Si-doped, and (010) Mgdoped β-Ga2O3 substrates prepared by either the floating zone growth or edge-defined film-fed growth methods.

TL;DR: In this paper, a complete set of polarized Raman spectra of β-Ga 2 O 3 was measured from (010) Mg-doped, (100) Si-doping, and (001) unintentionally-labeled β-ga 2 O3 substrates prepared by either the floating zone growth or edge-defined film-fed growth methods.

TL;DR: In this paper, the temperature-dependent exciton resonance energies in β-Ga2O3 single crystals were studied by using polarized reflectance measurement and the Eexciton values exhibited large energy changes in the range of 179-268'meV from 5 to 300'k.

TL;DR: Anisotropic optical properties on β-Ga2O3 films and a single crystal by spectroscopic ellipsometry measurements were investigated in this article, where the optical anisotropy in a biaxial crystal as well as the gradual increase in α were recognized as origins of the scattering in optically determined bandgap energies.