Cadmium Selenide (CdSe)

Application fields: IR optics, polarizers, l/4 and l/2 waveplates, beamsplitters; 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´1011 dyne/cm2
Coef. 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 perpindicular to <0001>, 300 K) 1.705
Max. 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 wavelenghts, 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