16:45 〜 17:00
▼ [21p-A404-14] Inverse Analysis of Near-Field Light Generated on a Plasmonic Nanoslit with Yukawa Potential
キーワード：atomphotonics
The short-range optical interaction mediated by near-field light is described in terms of the Yukawa potential with the Compton wavelength comparable to the radius of curvature of an object. The double-peak intensity distribution of near-field light associated with surface plasmon polariton on a metal-coated nano-slit is expressed with the Hamiltonian density. The peak position depending on the radius of curvature of the slit edge is numerically derived by solving the differential equation for the intensity extremum. The correlation function between the peak position and the radius of curvature is recursively calculated under the distribution of electric dipole moments over a quarter cylindrical surface obtained from the FDTD simulations. The approach developed in this study can be applied to the non-demolition cross-sectional measurement of a nanostructure with SNOM.