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Direct measurements on graded grating structures show that light of different wavelengths in the 500-700 nm region is “trapped” at different positions along the grating, consistent with theoretical predictions, thus verifying the “rainbow” trapping effect.
Plasmonics has provided researchers new means to control optical dispersion and light localization at nanoscale dimensions. Plasmonic design approaches are yielding building blocks for chip-based optical components as well as optical metamaterials and light trapping structures for improved efficiency in thin solar cells.
<para> In this paper, we have investigated the enhancement of the plasmonic light beaming efficiency by near-field resonance in different subwavelength metallic slit-groove beaming structures. We show that by selecting the suitable film thickness and separation distance of beaming gratings, the intensity of the near field can be greatly enhanced by resonance, which leads to the increase of the...
We report long-range plasmonic waveguides with a dye-compatible cladding material, exhibiting visible-light propagation lengths up to 0.5 mm. Experimentally determined propagation lengths are compared to simulations and a strategy for further improvements is identified.
The feasibility of realizing an active Tera Hertz (THz) switch by utilizing artificially corrugated perfect conductor meta-materials is reported in this paper by demonstrating that the strongly localized THz spoof surface plasmon polariton (SSPP) modes can be easily controlled by changing the refractive index of dielectrics inside a longitudinal metallic structure with a periodic array of grooves...
We report on experimental realization of different metal-dielectric structures that are used as surface plasmon polariton waveguides and as plasmonic metamaterials. Fabrication approaches based on different lithographic and deposition techniques are discussed.
We report the results concerning the theoretical optimization of a surface plasmon-polariton based waveguide at the optical communication wavelength of 1.55 mum. In particular, the effect of metal thickness and grating depth on the excitation of long- and short-range surface plasmon polaritons in a dielectric/metal/dielectric structure are considered. It is shown that the coupling between these modes...
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