Index profile

Index profile

Incident & calculation parameters

Wavelength λ (nm)

Mode type

Substrate index n_s

Curve sample points

Mode index offset

Waveguide width (μm)

Add data

Effective index n_eff

Quick add

TE 0

TM 0

Algorithm & fitting

Depth calculation method

Surface fitting formula

Note: Δn = peak index − n_s. Erfc uses the physical decay erfc(x/D); using exp(x/D) would make the index grow with depth.

Surface fitting formula

Peak index n₀

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Δn

--

R²

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Mode turning-point depths Fitted curve / contours Unit: μm

Results

Mode	Pol	n_eff	Depth (μm)
No data

Formula & parameters

Shown after you click Calculate.

Try “Load demo” first, then Calculate.

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