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Cadmium Selenide - CdSe Crystals

Cadmium Selenide - CdSe Crystals

Cadmium selenide CdSe is most suitable crystal material for polarizers, IR optics, sources for vaccum deposition, beamsplitters, DFM converters.

from 1221 $
delivery Estimated delivery time: 6 - 7 weeks
Products
Specifications
References
Description
Polishing: 60/40 Scratch & Dig - all sides polished
Code Size Resistivity Orientation Price Delivery Add to cart
CdSe-0921-03 5x5x0,5 mm low resistivity (<1 Ohm'cm) <0001> 1271 $ 6 - 7 weeks
CdSe-0921-04 5x5x1 mm low resistivity (<1 Ohm'cm) "c" 1221 $ 6 - 7 weeks
Polishing: 60/40 Scratch & Dig - 2 sides polished
Code Size Resistivity Orientation Price Delivery Add to cart
CdSe-0921-12 10x10x0,5mm low resistivity (<1 Ohm'cm) <0001> 1463 $ 6 - 7 weeks
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):
 no= 2.4258, ne=2.4437
Max. single crystal diameter/length: Ø50.8×40 mm
Max. IR optic blank diameter/length: Ø50×50 mm or plate 60×60×6 mm
Surface quality: As-cut, 60/40 scratch*dig per MIL-0-13830

[1] W. Chen, F. Cazier, F. Tittel, D. Boucher, Appl. Opt. 39 (2000) 6238.
[2] G.C. Bhar, S. Das, K.L. Vodopyanov, Appl. Phys. B 61 (1995) 187.
[3] W. Chen, G. Mouret, D. Boucher, Appl. Phys. B 67 (1998) 375.
[4] G.C. Bhar, D.C. Hanna, B.Luther-Davies and R.C.Smith, Optics Communications, Vol 6, number 4 (1972) 323-326.
[5] D.C. Hanna, B.Luther-Davies, R.C.Smith and R.Wyatt, Appl Phys Letters, Vol. 25, No. 3 (1974) 142-144.
[6] A.Dhirani, P.Guyot-Sionnest, Opt. Lett. 19 (1995) 1104.
[7] K.L. Vodopyanov, Opt. Commun. 150 (1998) 210.
[8] T.. Alik, S.Chandra, D.M.Rines, et. al., Opt. Lett 22 (1997) 597.

Coherent sources in the mid-IR domain have potential applications in molecular spectroscopy, biomedicine, and remote sensing. Laser systems with CdSe crystal have obvious advantage – much broader tuning range [1-3]. In the difference-mixing of the output of parametric oscillator in CdSe to obtain the phase matched 9.4-24.3 µm tuning range [5]. CdSe crystal has its band edge in the near infrared and shows transmission far into the infrared. The long wavelength limit determined by the onset of lattice absorption 1.5 cm-1 @ 24.3µm.

 

There is also a narrow impurity absorption centered at 18.5um which varies from one crystal to another. As a nonlinear optical material, CdSe crystal was explored for OPG, OPO and DFG in 1970’s [4,5]. First of all, picoseconds pulses tunable from 10 to 20 µm were produced [6]. Furthermore, CdSe was also used to achieve megawatt peak power in the range of 8-13 and 7-12 µm, based on OPG and OPO respectively [7,8].

 
Sellmeier equations [4]:

Where λ is in microns.