砷化镓
Release date:2015-2-16   Clicks:1888

砷化镓

Gallium Arsenide

砷化镓是半绝缘体,它在大功率连续 CO2激光系统中可以替代硒化锌用来作透镜和窗口。砷化镓拥有良好的硬度和强度,相对于较软的基底材料,砷化镓在多灰尘或微粒的恶劣环境下,表现更加突出。而较软的基底会允许微粒嵌入光学元件中,这样使得即使再好的镀膜也会无济于事。砷化镓材料不具有吸湿性,其化学特性十分稳定(除非与强酸接触),可以安全使用。

 

光学性能 透光波长范围 1.0-22 μm 机械性能 杨氏模量 83 GPa 
Transmission Range  Young's Modulus (12.04x 106 psi)
体吸收系数  断裂模数 138 MPa 
Bulk Absorption   <= 0.001 cm-1 Mechanical Properties Rupture Modulus (20,000 psi)
Coefficient  @ 10.6μm 努氏硬度 750 kg/mm2
Optical Properties 折射率温度系数  Knoop Hardness
Temp. Change of  149 x 10-6/°C 波森比 0.31
Refractive Index  @ 10.6μm Poisson's Ratio
热学性能 导热率  0.48 W/cm/°C 物理性能 密度 5.37 g/cm3
Thermal Conductivity @ 20° C
比热 0.325 J/g/°C Density
Thermal Properties Specific Heat 颜色  黑灰色
线性膨胀系数  5.7 x 10-6/°C Physical Properties colour Dark gray
Linear Expansion  晶体结构Crystal 闪锌矿型晶格结构
Coefficient @ 20° C  structure zinc blende 

 

                                                     砷化镓折射率(n)

                                              (20°C室温条件)

光学折射率

Wavelength

折射率

Wavelength

折射率

Wavelength

折射率

Wavelength

折射率

(μm)

n

(μm)

n

(μm)

n

(μm)

n

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

2.2701

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

Indices of Refraction (n)

3.8

3.3089

6.6

3.2939

9.4

3.2806

12.2

3.2651

4.0

3.6069

6.8

3.2931

9.6

3.2794

12.4

3.2635

4.2

3.6057

7.0

3.2923

9.8

3.2782

12.6

3.2620

4.4

6.6045

7.2

3.2914

10.0

3.2770

12.8

3.2604

4.6

6.3034

7.4

3.2905

10.2

3.2761

13.0

3.2589

4.8

3.3022

7.6

3.2896

10.4

3.2743

13.2

3.2573

5.0

3.301

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

 

                                        砷化镓材料透过率

                                    Gallium Arsenide Transmission

 

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