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GaAs - Gallium Arsenide

American Photonics gallium arsenide provides an alternative to zinc selenide when toughness and durability are important. GaAs works well in high power CW CO2 laser lenses and partial reflectors. In applications when contaminant particles can build up on the optics surface, GaAs provides better performance and longer life.

GaAs is thoroughly inspected for voids and inclusions to insure your material is healthy for optical applications. The material is non-hygroscopic and chemically stable except when contacted with strong acids.
znsms spec chart image
Mechanical Properties
Density
(g/cm3 @ 300K)
5.32
Knoop Hardness
(kg/mm2)
731
Young's Modulus
(GPa)
82.68
Bulk modulus
(GPa)
75.5
Poisson's Ratio

0.31

Optical Properties
Bulk Absorption
(cm-1 @ 10.6µm)
0.01
Temp. Change of refractive index
(@10.6µm)
149X10-6/°C


Thermal Properties
Thermal Conductivity
(@20°C)
0.48 W/cm/°C
Thermal Expansion
(K-1 @ 300K)
5.7 X 10-6
Specific Heat
(cal/(gK)@273K)
0.076
Debye temperature
(K)
360
Refractive Index
Wavelength µm
Index
Wavelength µm
Index
Wavelength µm
Index
Wavelength µm
Index
2.6
3.3239
5.4
3.2991
8.2
3.2868
11.0
3.2725
2.8
3.3204
5.6
3.2982
8.4
3.2859
11.2
3.2713
3.0
3.3169
5.8
3.2972
8.6
3.2849
11.4
3.2701
3.2
3.3149
6.0
3.2963
8.8
3.2840
11.6
3.2690
3.4
3.3129
6.2
3.2955
9.0
3.2830
11.8
3.2678
3.6
3.3109
6.4
3.2947
9.2
3.2818
12.0
3.2666
3.8
3.3089
6.6
3.2939
9.4
3.2806
12.2
3.2651
4.0
3.3069
6.8
3.2931
9.6
3.2794
12.4
3.2635
4.2
3.3057
7.0
3.2923
9.8
3.2782
12.6
3.2620
4.4
3.3045
7.2
3.2914
10.0
3.2770
12.8
3.2604
4.6
3.3034
7.4
3.2905
10.2
3.2761
13.0
3.2589
4.8
3.3022
7.6
3.2896
10.4
3.2752
13.2
3.2573
5.0
3.3010
7.8
3.2887
10.6
3.2743
13.4
3.2557
5.2
3.3001
8.0
3.2878
10.8
3.2734
13.6
3.2541