Cadmium Selenide (CdSe)

Application fields: IR optics, polarizers, beamsplitters, l/4 and l/2 waveplates; substrates; sources for vacuum deposition, DFM frequency convertors (NCPM type II)
CAS # 1306-24-7
Growth methods: HPVB or HPVZM
Structure Wurtzite (Hexagonal)
Density:  5.81 g/cm3
Young’s Modulus: 5´1011dyne/cm2
Coefficient of Thermal Expansion (500 K): a 1=6.26´10-6/K;a 3=4.28´10-6/K
Specific Heat: 0.49 J/gK
Thermal conductivity (at 25 oC): 0.04 W/cmK
Eg, eV (E//<0001>, 300 K) 1.73
Eg, eV (E perpendicular to <0001>, 300 K) 1.705
Max. light transmittance (l=2.5-15 mm): ³ 71 %
Absorption Coef. (l=10.6 mm): £ 0.0015 cm-1(including 2 polished surfaces)
Refractive index (l=10.6 mm): 2.4258 (no), 2.4437 (ne)
Refractive indexes at other wavelengths, birefringence & Sellmeier coefficients CLICK HERE
Specific resistivity: a). low: < 1 Ohm*cm
b). high: > 1012 Ohm*cm

Transmittance spectra:

CdSe single crystal tape "as grown"
Possible orientations of 
the single crystal tape
CdSe prism
CdSe single crystal
CdSe substrates
CdSe frequency convertor (blank)

Typical content of impurities in 5N CdSe crystals

Material Safety Data Sheet