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
Max. Transmittance (l =2.5-15 mm): ³ 71 %
Absorption Coef. (l =10.6 mm): £ 0.0015 cm-1 (including 2 surfaces)
Refractive index (l =10.6 mm): 2.4
Specific resistivity a). low: < 1 Ohm*cm
b). high: > 1012 Ohm*cm
Max. single crystal diameter/length: Æ 50.8´40 mm
Max. IR optic blank diameter/length: Æ 50´50 mm or plate 60´60´6 mm

Transmittance spectra:

CdSe plate "as grown"
 Possible orientations of 
the single crystal tape
CdSe prism
CdSe single crystal
CdSe substrates
CdSe DFM convertors (blanks)

Typical content of impurities in 5N CdSe crystals

Material safety data sheet