# RefractiveIndex.INFO

## Optical constants of Si (Crystalline silicon)

From RefrectiveIndex.INFO - Refractive index database

Optical constants of Si (Crystalline silicon)
 Option: Handbook of Optics (n; 1.36-11µm) Palik Aspnes and Studna 1983 (n,k; 0.21-0.83µm) SOPRA: Orientation 100 SOPRA: Orientation 110 SOPRA: Orientation 111 SOPRA: 20 °C SOPRA: 100 °C SOPRA: 150 °C SOPRA: 200 °C SOPRA: 250 °C SOPRA: 300 °C SOPRA: 350 °C SOPRA: 400 °C SOPRA: 450 °C Wavelength: µm  (1.36~11)
Refractive index

Refractive index - Wikipedia

 n = 3.42009 Chromatic dispersion Dispersion (optics) - Wikipedia dn/dλ = -0.00121 µm-1
Dispersion formula

Sellmeier equation - Wikipedia

$$n^2 - 1 = \frac{10.6684293 λ^2}{λ^2-0.301516485^2} + \frac{0.003043475 λ^2}{λ^2-1.13475115^2} + \frac{1.54133408 λ^2}{λ^2-1104.0^2}$$

Expressions for n

Conditions

Room temperature

References

- Handbook of Optics, 3rd edition, Vol. 4. McGraw-Hill 2009 [link]

Reflection calculator
Angle of incidence (0~90°):
Direction: in out
 Reflectance (at 6.18 µm) Fresnel equations - Wikipedia RS = ... (S-polarized) RP = ... (P-polarized) R = ... (non-polarized, (RS+RP)/2 ) Reflection phase ɸ = ...° ɸS = ...° ɸP = ...° Brewster's angle Brewster's angle - Wikipedia θB = ...° Critical angle Total internal reflection - Wikipedia θC = ...°