Full text loading...
The experimental setup: the collection mode (c-SNOM) measures the optical signal coupled into the metal coated aperture tip, while the polarization-resolved scattering mode (s-NSOM) measures light scattered off the probe apex into the far field.
SPP decay length along the axis. (a) dependence of the s-NSOM signal for wide slit. (b) SPP decay length for various slit widths. Dashed line represents the theoretical decay length calculated from SPP dispersion relation.
Far-field transmittance (black), near-field intensity for excitation with polarization perpendicular to the slit (red), and near-field intensity for excitation with polarization along the slit (blue) as functions of slit width.
Near-field intensity as a function of slit width, measured by collection mode (filled circle), scattering mode (filled square), and calculated slit-width dependent SPP mode (dashed).
Article metrics loading...