Abstract

We present temperature-dependent refractive index along crystallographic b[010] and a direction perpendicular to (100)-plane for monoclinic phase (β) Ga2O3 single crystal grown by the optical floating zone technique. The experimental results are consistent with the theoretical result of Litimein et al. [1]. Also, the Sellmeier equation for wavelengths in the range of 0.41.55μm is formulated at different temperatures in the range of 30175°C. The thermal coefficient of refractive index in the above specified range is 105/°C.

© 2011 Optical Society of America

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