Evanescent Field Penetration Depth

80

80

Above
Penetration
Depth

Below
Penetration
Depth

d

Penetration (d) = 1054 nm

Incident Ray

Standing Wave

Reflected Ray

I(z) = I_o e^{-z / d}

n₂
n₁

Incident Angle (θi): 80°

Refractive Index (n₁)

Wavelength (λ): 700 nm

Refractive Index (n₂)