Temperature-dependent index of refraction of monoclinic Ga2O3 single crystal

Indranil Bhaumik; R Bhatt; S Ganesamoorthy; A Saxena; A K Karnal; P K Gupta; A K Sinha; S K Deb

doi:10.1364/AO.50.006006

Temperature-dependent index of refraction of monoclinic Ga2O3 single crystal

Appl Opt. 2011 Nov 1;50(31):6006-10. doi: 10.1364/AO.50.006006.

Authors

Indranil Bhaumik¹, R Bhatt, S Ganesamoorthy, A Saxena, A K Karnal, P K Gupta, A K Sinha, S K Deb

Affiliation

¹ Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore-452 013, India. neel@rrcat.gov.in

PMID: 22086027
DOI: 10.1364/AO.50.006006

Abstract

We present temperature-dependent refractive index along crystallographic b[010] and a direction perpendicular to (100)-plane for monoclinic phase (β) Ga(2)O(3) 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 0.4-1.55 μm is formulated at different temperatures in the range of 30-175 °C. The thermal coefficient of refractive index in the above specified range is ~10(-5)/°C.