Hangzhou Freqcontrol Electronic Technology Ltd.
Hangzhou Freqcontrol Electronic Technology Ltd. We Grow Crystal. We Fabricate Wafer. We are Piezoelectric Specialist.
Add to Cart
Ultra-Thin LiTaO3 Wafer Z-Cut For Pyroelectric Infrared Detector
Lithium tantalite (LiTaO3) presents unique electrooptical, acoustic, piezoelectric, pyroelectric and non-linear optical properties, making it a suitable material for applications in pyroelectric infrared detector. The z-cut single crystal LiTaO3 shows more advantages as a new type of optical material than other traditional optical substrate materials, such as large pyroelectric coefficient, small dielectric constant, high curie temperature and uniformity of crystallinity.
Ultra-thin lithium tantalate crystal (LiTaO3) was used as sensitive layer in high responsivity room temperature pyroelectric infrared detector.
For many years the pyroelectric material lithium tantalate (LiTaO3 ) has proved itself at use in pyroelectric detectors. It fulfils not only the demands on material characteristic quantities just mentioned but also stands out due to an excellent temperature stability and very good reproducibility of the detector performance.
Typical material properties of LiTaO3 at room temperature are:
p = 1,8 . 10-8 Ccm-2K-1
εr = 43
tanδ = 0,001
cP´ = 3,2 Jcm-3K-1
| Transparency Range | High transmittance from 0.4 to 4um |
| Crystal Symmetry | Trigonal, space group C3v OR 3m |
| Density | 7.45 |
| Curie Temperature | 605±2℃ |
| Mohs Hardness | 5.5 |
| CTE | αa=16.1×10^-6/k, αc=4.1×10^-6/k |
| Refractive Indices, Birefringence | n0=2.176, ne=2.18, Δn=0.004 at 0.63um |
| Dielectric Constants (Relative) | ετ11=53.6; ετ33=43.4 |
| Pyroelectric Coeff. @27℃ | 0.019 u Coulomb/cm2/℃ |
| Electro-Optic Coeff. @633m | Γ13=7×10^-12m/v |
| Nonlinear Optical Coeff. @1.06um | d22=2.08×10^-12m/v |
Acceptance Check