Abstract
The giant Goos–Hänchen shift on a long-range surface plasmon (LRSP) configuration isexamined theoretically. This lateral shift at the resonance of the LRSP can be two orders ofmagnitude greater than a wavelength. The analytical formulas of the radiative dampingand the intrinsic damping of the LRSP are derived. It is found that the thicknesses of thesecond medium and the metal film determine the radiative damping and the intrinsicdamping is illuminated by the imaginary part of the dielectric constant of the metal.Negative lateral beam shift occurs when the intrinsic damping is larger than the radiativedamping. The theoretical results show good agreement with the predictions of the formulas.
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