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 the fields of solar cells, light-emitting diodes and high-energy ray detection. The product has the characteristics of wide transmittance band, low optical absorption and excellent optical and electrical properties. Can be used in polarizer, beam, DFM converter, optical 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