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CdSe
CdSeCadmium 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.

Basic properties

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

CdSe Transmission

CdSe Optical Transmittance

Products

CdSe rods, wafers and substrates

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

CdSe crystal pieces for vapour deposition

Purity 99.995%, 99.999%
Particle size 0.01- 10 mm

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