TiO₂ Crystal Substrate

Rutile phase Titanium Oxide (TiO₂) single crystal is one of the most commonly used materials for optical isolators and special prisms. This is because TiO₂ has a large birefringence with a high refractive index. Furthermore，compared to YVO4, TiO₂ crystal it is more stable chemical and physical properties. Rutile is attracting attention not only as a birefringent material for optics but also as a substrate for epitaxial growth.

Parameter

Physical Properties

Crystal Structure	Tetragonal a=4.5936 Å,c=2.9582 Å
Growth Method	Floating Zone
Melting Point	1840°C
Density	4.26g/cm³
Hardness	Mohs 7
Specific Heat capacity	0.17 (25℃)Cal./(g.Deg)
Linear expansion Coefficient	a:7.14×10^-6 c:9.19×10^-6
Refractive Index	n0=2.47 ne=2.73 at l=1.3mm
Transmittance	0.5- 4.5 mm
Thermal optical Coefficient	dh/dT: a:-0.72 x10^-6/K c:-0.42 x10^-6/K
Crystal boule dimension	~25 mm diax35mm length (conical)

Main Specification

Surface Polishing	Single or double side polished, Epi-ready, Ra < 0.5 nm
Crystal Orientations	(001), (100), (110), (111)
Size	5×5 mm, 10×10 mm, other customized sizes are available upon request
Package	Sealed in class 100 clean bag packed in class 1000 clean room