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Refractive index n of AlAs

Contents  
   
 
Equation  
 

According to Sadao Adachi J. Appl. Phys. Vol. 58, No.3, (1985) R1 the real part of the refractive index n of AlAs below the band gap edge can be expressed by:

 
 
  Formula refractive index of AlAs eq.(1)  
 
  with  
  Formula f   down
  Formula  
  Formula  
 
  In this equation the symbols and constants have the following meaning in the case of AlAs at room temperature:
 
  n (real part) of the refractive index  
  l wavelength in the vacuum  
  h = 6.626 10 -34 Js Planck´s constant  
  c = 2.998 108 m/s speed of light in the vacuum  
  hc/l photon energy  
  A0 = 25.3 constant, determined by fitting with experimental data  
  B0 = - 0.8 constant, determined by fitting with experimental data  
  E0 = 2.95 eV fundamental band gap at G-point  
  E0 + D 0 = 3.25 eV with D0 spin-orbit splitting energy  
 
 
Numerical values  
 
 

Refractive index n of AlAs calculated with eq. (1)

 
 
 
l(nm) n(AlAs) Graph Eg(x)
450 3.677
500 3.380
550 3.250
600 3.170
650 3.115
700 3.074
750 3.044
800 3.021
900 2.986
1000 2.963
1200 2.934
1500 2.912
2000 2.895
 
 
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