Mode calculator

Input parameters

Wavelength (nm)

Prism code

Prism refractive index

Substrate refractive index

Prism angle (°)

Using manual prism parameters.

Auto-fill prism index and angle from prism code

Film refractive index

Film thickness (μm)

Top film index n₁

Top film thickness w₁ (μm)

Bottom film index n₂

Bottom film thickness w₂ (μm)

Polarization

TE TM

Advanced parameters

Top cladding index

Ambient index

Sample count

Bisection iterations

Angles in °; Kz in μm⁻¹. Dual-film rows are color-coded by branch.

Structure

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Prism

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Mode count

Elapsed

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Upper-film guided: β > n₂

Leaky / lower branch: β ≤ n₂

Order	Angle (ext)	Beta	Angle (int)	Phi (bot)	Phi (top)	Kz
Enter parameters and click “Calculate modes”