KTaO3 Substrate

Potassium tantalate (KTaO3 or KT) single crystal has a stable cubic structure and can be used to make laser modulators, digital deflectors and semiconductor devices. Because the crystal has no phase change in the temperature range from absolute zero to its melting point (1645K), and its unit cell parameters match very well with yttrium-barium-copper-oxygen superconductors, and it is promising to be used as a substrate material for superconductor films.

OST Photonics offers high quality KTaO3 substrates for researchers and industries. Crystal orientation, size and thickness can be customized according to your requirements.

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Features

  • Stable crystal structure

  • No phase change

Applications

  • Laser modulators

  • Digital deflectors

  • Semiconductor devices

Processing Capability

  • Orientation:<100>,<110>,<111>, etc.

  • Dimension: 5x5mm, 10x10mm, 20x20mm, etc.

  • Thickness: 0.5mm, 1.0mm, etc.

  • Available items: substrates, blanks and customized optics

Specification and properties of KTaO3 Substrates

Crystal Structure

Cubic

Space Group

m3m

Growth method

Czochralski

Melting point

1352.2 ℃

Lattice constant

3.984 Å

Density

7.025 g/cm3

Mohs Hardness

6 Mohs

Refractive Index

2.226@633nm, 2.152@1539nm

Thermal Expansion

4.027×10^-6/K

Specific Heat at Room Temperature

0.378 J/gK

Transmission Wavelength

380~4000 nm

Orientation

<100>,<110>,<111>, etc.

Orientation tolerance

±0.5° or better

Dimension

5x5mm, 10x10mm, 20x20mm, etc.

Dimension Tolerance

±0.1 mm or better

Thickness

0.5mm, 1.0mm, etc.

Thickness Tolerance

±0.05 mm or better

Surface Finish

Single side polished (SSP)/Double sides polished (DSP)

Roughness

Ra≤5Å

Package

Class 100 clean bag, Class 1000 super clean room