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Refractive index n of GaAs

Sellmeyer equation

In the energy range below or near the fundamental absorption edge the dispersion of the refractive index n(l) of GaAs can be calculated by the first-order Sellmeier equation:

Formula refractive index of GaAs

In this equation the symbols and constants have the following meaning in the case of GaAs at room temperature:

Numerical values

calculator Calculator for n(λ)   (uses javascript)

λ (nm) n(GaAs)
850 3.655
900 3.586
950 3.538
1000 3.502
1050 3.475
1100 3.454
1200 3.423
1300 3.401
1400 3.386
1500 3.374
1700 3.358
2000 3.343

Graph n(λ)