title: Temperature-dependent index of refraction of monoclinic Ga2O3 single crystal.
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.
authors.affiliation: Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore-452 013, India. neel@rrcat.gov.in
authors.forename: Indranil
authors.initials: I
authors.lastname: Bhaumik
authors.forename: R
authors.initials: R
authors.lastname: Bhatt
authors.forename: S
authors.initials: S
authors.lastname: Ganesamoorthy
authors.forename: A
authors.initials: A
authors.lastname: Saxena
authors.forename: A K
authors.initials: AK
authors.lastname: Karnal
authors.forename: P K
authors.initials: PK
authors.lastname: Gupta
authors.forename: A K
authors.initials: AK
authors.lastname: Sinha
authors.forename: S K
authors.initials: SK
authors.lastname: Deb