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Reflectivity measurements in an attenuated total internal reflection (ATIR) geometry and the variation of the transmitted intensity associated to the total electric field in a frustrated ATIR configuration using a photon scanning tunneling microscope (PSTM) of multilayered metallic films are presented as a function of the angle of incidence. Eigenmodes for total reflection and absorption associated with the optical properties of magnetic and nonmagnetic materials are theoretically and experimentally determined from the reflected and the transmitted spectra. Good agreement between theory and experiment demonstrates that PSTM is a powerful technique to characterize accurately and locally drastic variations of the intensity around optical modes of a multilayer system.

This article studies, in the near-field zone, the magneto-optical Faraday effect of metallic multilayers illuminated under the condition of total internal reflection. We present numerical results obtained by the Green’s dyadic technique which depicts the distribution associated with each Cartesian component of the electric field inside, as well as outside, the magneto-optical structure. The Faraday rotation is found to increase significantly around the resonances associated either with plasmons or to interferences inside thin films.

This article presents a theoretical study of the near-field optical properties of subwavelength resonant metallic particles deposited on a surface. Using the Green’s dyadic method, we derive stable solutions for both electric and magnetic fields inside and outside metallic particles of arbitrary shape. To assess the reliability of the computational scheme applied to resonant particles, we compare our data with those produced by other models. Since the Green’s dyadic method allows us to cope with particles exhibiting sharp edges such as lithographically designed nanostructures, we explore mesoscopic optical effects which are out of reach of standard computational methods.

The optical properties of racetrack shaped dielectric loaded surface plasmon polariton resonators are studied experimentally for various radius, interaction lengths, and separation gaps between the resonator and the bus waveguide. Using radiation leakage microscopy, their power transmission spectra is recorded over the telecom frequency range and modeled by a notch filter made of a lossy bus waveguide coupled to a lossy resonator. For a typical separation gap around 250 nm, the optimum critical coupling condition is determined by a radius of 6 μm and an interaction length of 2.5 μm. Extinction ratios of the order of -30 dB are reported for resonators featuring quality factors that are found to be of the order of 110. The static thermo-optical control of such racetrack resonators produces a blueshift of the resonance frequency that can be as large as 4.5 nm for a temperature increase of 75 K. Extinction ratio of the order of 9 dB can be achieved between hot and cold states.