LiTaO3 Substrate

LiTaO3 (lithium tantalate) substrate refers to a crystalline material commonly used in various electronic and optoelectronic applications. Here are some key points about LiTaO3 substrates:

1. Crystal structure: LiTaO3 has a perovskite crystal structure, which is characterized by a three-dimensional network structure of oxygen atoms in which lithium and tantalum atoms occupy specific positions.

2. Piezoelectric properties: LiTaO3 is highly piezoelectric, which means it generates an electric charge when subjected to mechanical stress and vice versa. This feature makes it useful in various acoustic wave devices such as surface acoustic wave (SAW) filters and resonators.

3. Nonlinear optical properties: LiTaO3 exhibits strong nonlinear optical properties, enabling it to generate new frequencies or change the characteristics of incident light through nonlinear interactions. It is typically used in devices utilizing second harmonic generation (SHG) or optical parametric oscillation (OPO), such as frequency doubling crystals or optical modulators.

4. Wide range of transparency: LiTaO3 has a wide range of transparency from ultraviolet (UV) to infrared (IR) region. It can transmit light from approximately 0.38 μm to 5.5 μm, making it suitable for a variety of optoelectronic applications operating in this range.

5. High Curie temperature: LiTaO3 has a high Curie temperature (Tc) of about 610°C, which is the temperature at which its piezoelectric and ferroelectric properties disappear. This makes it suitable for high temperature applications such as high power acoustic wave devices or high temperature sensors.

6. Chemical stability: LiTaO3 is chemically stable and resistant to most common solvents and acids. This stability ensures the durability and reliability of the substrate in various operating conditions and environments.

7. Good mechanical and thermal properties: LiTaO3 has good mechanical strength and thermal stability, enabling it to withstand mechanical stress and high temperature without significant deformation or degradation. This makes it suitable for high power applications or environments with harsh mechanical or thermal conditions.

LiTaO3 substrates are widely used in various applications including SAW devices, frequency doubling devices, optical modulators, optical waveguides, etc. Its combination of piezoelectric and nonlinear optical properties, wide range of transparency, high Curie temperature, chemical stability, and good mechanical and thermal properties make it a versatile material in the field of electronics and optoelectronics.