Single crystal substrates / Piezoelectric effect crystals

Pictures Materials / Sizes Features / Applications
LSAT (LaAlO3)0.3(Sr2AlTaO6)0.7 is a newly developing crystal with peroviskite structure and twin-free

Size: 2″- 3” dia x 0.5mm; 10x10x0.5mm; 5x5x0.5mm

Special size and orientation is available upon request

 LSAT has excellent lattice match with high Tc superconductors and many oxide materials

LSAT has lower melting point and can be grown by CZ technology at lower cost, therefore, it is expected to replace LaAlO3 and SrTiO3 as a common single crystal substrate for epitaxial oxide thin films for gain magnetic ferro-electronic and superconductive devices
Subsituted Gadolinium Gallium Garnet (SGGG)

Gadolinium gallium garnet (Gd3Ga5O12 or GGG) is a special substrate magneto optical films. In optical communication equipment, a large number of 1.3 and 1.5 micron optical isolators are needed, and the core component is YIG or BIG film placed in the magnetic field

Size: Up to 3 inches diameter

 Different tangential GGG single crystal substrates can be matched with the lattice of such magneto-optical materials, thus ensuring the successful epitaxial growth of YIG and BIG films

The good physical, mechanical and chemical stability of GGG also ensures the requirements of the substrate in the process of film preparation. The substrate material is made of microwave isolator GGG

Application: SGGG is used as substrates for liquid epitaxy. It’s dedicated substrates for magneto-optical film
Co2+: MgAl2O4 (Co2+: Spinel or Co: MALO) crystals is a new material for passive Q-switching in lasers emitting from 1.2 to 1.6µm, in particular, for eye-safe 1.54µm Er: glass laser, but also works at 1.44µm and 1.34µm wavelengths

Size as specified: Round, square or flats

 High absorption cross section (3.5E-19cm2) permits Q-switching of Er: glass laser without intracavity focusing both with flash-lamp and diode-laser pumping. Negligible excited-state absorption results in high contrast of Q-switch, i.e. the ratio of initial (small signal) to saturated absorption is higher than 10
Lanthanum gallium silicate (La2Ga5SiO14) is a phenomenal invention. Though langasite was initially developed as a laser crystal, it revealed a remarkable combination of piezoelectric qualities, which opened up new opportunities to use the LGS crystal in radio frequency devices

Sizes: 60mm dia. max.; 70mm length for rod or flats

 High damage threshold

Good optical rotation

Can withstand high and low temperature changes

Stable physical and chemical properties

High electromechanical coupling coefficient (3 times of quartz)

Low equivalent series resistance

Applications: Electro-optic Q-switch, SAW device, BAW device, Sensor, High power high repetition rate all solid state laser, High and low temperature change laser
LiNbO3 (Lithium niobate, LN) crystal is a negative uniaxial crystal and one of the most thoroughly characterized optical materials. With its wide transparency range in the visible and mid-infrared and the excellent chemical and mechanical stability, LN crystal can be used as a bifrengent material for applications in infrared

SAW Grade Doping Lithium Niobate Wafer MgO Er Fe Doped LT Optical Grade

Size: Up to 8 inches diameter

 With its large electro-optic coefficients, wide optical transparency window, and availability of high optical quality crystals, LN (lithium niobate) crystal is often the material of choice for optical modulation and Q-switch at near-infrared and infrared wavelengths

For electro-optic modulators (EOM) the crystal can be Z-cut with zero residual birefringence along the direction of light propagation or X-cut with non-zero residual birefringence and the maximized effective electro-optic coefficient

For Q-switch the crystal is typically Z-cut with zero residual birefringence and an electric field is applied transverse to the direction of light propagation. The piezoelectric ringing in LN is a disadvantage at high repetition frequency, but can be overcome to some extent with proper piezoelectrically damped designs
Gallium Gadolinium Garnet (Gd3Ga5O12 or GGG) single crystal substrates is used as substrates for liquid epitaxy growth of YIG or BIG film

GGG substrates is dedicated substrates for magneto optical film

Size: Up to 4 inches

 Low optical loss (< 0.1%/cm), high thermal conductivity (7.4Wm-1K-1)

High laser damage threshold (> 1GW/cm2)

GGG has been successfully applied in the magnetic refrigeration industry in the temperature zone below 20k for market Hell flow and helium-nitrogen liquefaction pre-stage refrigeration
Black amorphous silicon is obtained by the reduction of sand (SiO2) with carbon. Ultra-pure crystals if silicon have a blue-grey metallic sheen. Bulk silicon is un-reactive towards oxygen, water and acids (except HF), but dissolves in hot alkalis. Silicon is used in semiconductors, alloys and polymers

Size: Up to 8 inches

 Doping type: No-doped

Resistivity Ω. Cm: 102~104

EPD (cm-2): <= 100

crystallographic direction: <111>; <100>; <110> ±0.5°

Surface: one or two sides polished
Yellow Black Fe2O3 Doped LiTaO3 Wafer: LiTaO3 is an E-O crystal widely used for E-O devices, due to its good optical NLO and E-O properties, as well as high damage threshold

Sizes: Up to 6 inches diameter

 Test results show that the lattice constant increases with the increase of Fe2O3 content. This result indicates a better photorefractive property of Fe: LiTaO3 than undoped LiTaO3

Applications: SAW, Q-switch, Light modulator, Sound and light switch, Laser frequency multiplication, Optical parametric oscillator, Optical memory, High temperature and high frequency ultrasonic detector, Infrared detector, Optical pick-up devices

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