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 | Cadmium selenide is a most suitable crystal for IR optics, polarizers, λ/4 and λ/2 waveplates, beamsplitters, substrates, sources for vacuum deposition, DFM frequency converters. |
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| Structure | Wurtzite (Hexagonal) |
| Density: | 5.81 g/ cm3 |
| Young’s Modulus: | 5×1011 dyne/cm2 |
| Coef. of Thermal Expansion (500 K): | α 1=6.26×10-6/K;
α 3=4.28×10-6/K |
| Specific Heat: | 0.49 J/gK |
| Thermal conductivity (at 25 °C): | 0.04 W/cmK |
| 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): | 2.4258 (no),
2.4437 (ne) |
| Specific resistivity | a). low: < 1 Ohm*cm
b). high: > about 10^11 Ohm*cm |
| Max. single crystal diameter/length: | Ø40mm X L: 80 mm |
| Max. IR optic blank diameter/length: | Ø50mm X L:10 mm OR plate 50 mm X 15 mm X 12 mm |
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CdSe rods, wafers and substrates |
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| Diameter/Width | 1-50 mm |
| Thickness/length | 0.1-150 mm |
| Orientation | (0001), (10-10), (11-20) |
| Surface quality | As-cut, 80/50, 60/40 per MIL-0-13830 |
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CdSe crystal pieces for vapour deposition |
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| Purity | 99.995%, 99.999% |
| Particle size | 0.01- 10 mm |
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