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Rutile ( TiO2) single crystal is one of the most suitable materials used for spectral prisms and polarizing devices such as optical isolators and beam displacers because it has a large birefringence with a high refractive index.   Compared to YVO4,  TiO2 crystal is more chemically and physically stable.   Our high-quality TiO2 (rutile) single crystal is grown by the floating zone method and is an excellent choice to be used as optical components and epi thin-film substrates.

Crystal

Birefringence D=he-ho

Refractive index h at l= 0.63m

Thermo optical Coef.dh/dT 106/K

Structure  lattice constant (A)

Melting point oC

Density g/cm3

Hard-ness (Moh)

Thermal Coef. 10-6/K

YVO4

+ 0.222

ho=1.9929
he=2.2154

a: -8.5
c: -3.0

Tetragonal    
a=7.12 c= 6.29

1825

4.22

5

a: 4.46
c: 11.37

TiO2

+ 0.282

ho=2.583
he=2.865

a: -0.72
c: -0.42

Tetragonal  a=4.593 c=2.958

1840

4.26

7

a: 7.14
c: 9.19

  

TiO2 Substrates (001)

   TiO2 Substrates (100)

   TiO2 substrates (101)or (011)

   TiO2 substrates (110)

   TIO2 substrate (111)

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