Surface Plasmon Polariton Dispersion Calculator
Plasmonics & nanophotonics: Calculate surface plasmon polariton (SPP) wavevector ($k_{spp}$), wavelength ($\lambda_{spp}$), $1/e$ propagation length ($L_{spp}$), and evanescent field penetration depths into metal and dielectric.
Interface Materials & Optical Wavelength
632.8 nm = He-Ne red laser
SPP Wavelength & Propagation Length
SPP Wavelength λ_spp:
--
nm (sub-diffraction confinement)
Propagation Length L_spp:
--
μm (1/e decay distance)
Metal Re(ε_m):
--
negative permittivity
Skin Depth Metal:
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nm (δ_m)
Skin Depth Dielectric:
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nm (δ_d)
Dispersion & Momentum Matching
Effective Index n_eff = k_spp / k₀:
--
Photon-Plasmon Momentum Mismatch:
-- %
Kretschmann Coupling:
--
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