CdSe
CRYLINK’s CdSe product, also known as Cadmium Selenide crystal, is a nonlinear crystal product with excellent comprehensive performance, which is widely used in solar cells, light-emitting diodes, and high-energy ray detection. The product has the characteristics of a wide transmittance band, low optical absorption, and excellent optical and electrical properties. It can be used in polarizers, beams, DFM converters, and visual parametric oscillation products.
Parameter
Structure | Wurtzite (Hexagonal) |
Growth methods | HPVB or HPVZM |
Density | 5.81 g/ cm3 |
Young’s Modulus | 5×1011 dyne/cm2 |
Coef. of Thermal Expansion (500 K) | α1=6.26×10-6/K; α3=4.28×10-6/K |
Specific Heat | 0.49 J/gK |
Thermal conductivity (at 25 °C) | 0.04 W/cmK |
Eg, eV (E//<0001>, 300 K) | 1.73 |
Eg, eV (E perpendicular to <0001>, 300 K) | 1.705 |
Max. Transmittance (λ =2.5-15 μm) | ≥ 71 % |
Absorption Coef. (λ =10.6 μm) | ≤ 0.0015 cm-1 (including 2 surfaces) |
Refractive index (λ =10.6 μm) | no= 2.4258 ne=2.4437 |
Max. single crystal diameter/length | Ø50.8×40 mm |
Max. IR optic blank diameter/length | Ø50×50 mm or plate 60×60×6 mm |
Surface quality | As-cut, 60/40 scratch*dig per MIL-0-13830 |
Specific resistivity | low: < 1 Ohm*cm high: > 1012 Ohm*cm |
Sellmeier coefficient | CdSe no | CdSe ne |
A | 4.1318 | 4.0832 |
B | 1.8584 | 2.0041 |
C [um2] | 0.21999 | 0.20646 |
D | 2.7673 | 3.9928 |
E [um2] | 2962.98 | 3866.93 |
Plan view size (mm) | Length (mm) | θ | PHI | Application | Coating |
5×5 | 1 | 39° | 45° | DFG@1, 2-2, 4μm, I type | BBar/BBar@1.2-2.4/2.4-11μm, AOI=0° |
8×8 | 1 | 39° | 45° | DFG@1, 2-2, 4μm, I type | BBar/BBar@1.2-2.4/2.4-11μm, AOI=0° |
6×6 | 2 | 50° | 0° | DFG@1, 2-2, 4μm, I type | BBar/BBar@1.2-2.4/2.4-11μm, AOI=0° |
8×8 | 2 | 50° | 0° | DFG@1, 2-2, 4μm, I type | BBar/BBar@1.2-2.4/2.4-11μm, AOI=0° |
- Wide phase matching band
- Silent absorption at 8~15μm band
- Transmittance band width (0.75 to 25μm)
- Small double refraction and discrete angles
- Excellent optical and electrical performance
- Very low optical absorption（＜01cm-1，1~10μm）
- The effective nonlinear coefficient is medium（d31=18pm/V）
- LED
- IR optics
- Polarizers
- Solar cell
- Beamsplitters
- DFM converters
- Photoelectronics
- Functional transistors
- High-energy ray detection
- Optical parameter oscillation
- Sources for vaccum deposition
