2inch 4inch LiTaO3 Wafer Substrate Double or Single Polished Z-cut
X-cut Y-cut Saw grade
Description of LiTaO3 Wafer:
Lithium tantalate (LiTaO3) has a perovskite M6 crystal structure.
It has a unique combination of optical, piezoelectric, and
pyroelectric properties. The applications of lithium tantalate
crystal include nonlinear optics, passive infrared (IR) sensors
such as motion detectors, terahertz (THz) generation and detection,
and surface acoustic wave (SAW), just to name a few.
The character of LiTaO3 Wafer:
- Piezoelectric Properties: LiTaO3 is a piezoelectric material,
meaning it can generate an electrical charge in response to
mechanical stress and vice versa. This property makes LiTaO3 wafers
valuable in various sensor and actuator applications.
- Optical Properties: LiTaO3 wafers have excellent optical
transparency in the visible and near-infrared regions, making them
suitable for use in optical devices such as modulators, waveguides,
and optical switches.
- Acoustic Wave Devices: Due to its piezoelectric characteristics,
LiTaO3 wafers are commonly used in surface acoustic wave (SAW)
devices for signal processing applications.
- High Temperature Stability: LiTaO3 exhibits good thermal stability,
making it suitable for applications in high-temperature
environments.
- Ferroelectric Properties: LiTaO3 is a ferroelectric material,
meaning it has a spontaneous electric polarization that can be
reversed by the application of an external electric field. This
property is utilized in various memory and sensor applications.
- Substrate for Thin Films: LiTaO3 wafers are often used as
substrates for the growth of thin films for applications in
integrated optics, surface acoustic wave devices, and other
electronic devices.
The form of LiTaO3 Wafer:
| Parameter | Wafer (Boule) |
| Diameter (mm) | 76.2 ± 0.3 | 100.0 ± 0.3 |
| Axis Orientation | X, Y, Z, 36°Y, 42°Y |
| Thickness (mm) | 0.35-1mm |
| Ref. Flat Orientation | X, Y, 112.2°Y |
| Ref. Flat Width (mm) | 22.0 ± 2.0 | 32.0 ± 2.0 |
| Front Side Polish | +:Mirror Polished (Ra≤8Å) |
| Back Side Lapping (µm) | 0.2-4µm |
| TTV (µm) | ≤10 | ≤10 |
| PLTV (5×5mm; LTV < 1µm) | ≥97% | ≥95% |
| Bow (µm) | ≤20 | ≤35 |
| Edge Bevel | Edge Rounding |
| Poling | Complete |
| Curie Temperature (°C) | 605.0 ± 3.0°C |
Applications of LiTaO3 Wafer:
- Electro-optical modulators
- Wavefront distortion
- Integrated Optical devices
- Acoustic Transducers
- Acousto-optical filters
Application picture of LiTaO3 Wafer:
Packing and Shipping:
FAQ:
1.Q:What is the electro optic coefficient of lithium tantalate?
A: The unclamped linear electro-optic coefficients r 13 and r 33
for lithium tantalate are known at only one wave-length, 632.8 nm,
whereas the clamped coefficients are also known at 3.39 m.
2. Q:What is the pyroelectric coefficient of lithium tantalate?
A:The LT crystal has a TC of 605 °C and a pyroelectric coefficient
of 190 μC/m2 K, which is twice that of the LN [4,6,7], and it is
the best pyroelectric crystal with comprehensive performance.
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