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The fluorescence quenching of a single molecule can be controlled using a plasmonic device made of a metallic or negative-index slab and a metallic nanoparticle. The concept of dark near-field fluorescence imaging is introduced.
We have investigated the Bragg gratings for surface plasmonic polaritons modes in the metal-dielectric-air waveguide and proposed a bidirectional coupler which is capable to guide the incident light at different wavelengths along two predetermined directions.
We demonstrate that enhanced electro-optical effect in plasmonic microstructures is accompanied by dramatically reduced parasitic scattering of surface waves. Analytical description of relevant physics and implications for creation of high-performance dynamical plasmonic circuits are discussed.
We demonstrate that since the group velocity of spoof surface plasmon polariton modes at the cutoff frequency is extremely low, electromagnetic waves with different frequencies can be slowed down or even stopped at different positions.
We investigate characteristics of waveguide using highly-reflective semiconductor in the Restrahlen band. We identify spectral operating regions within the Restrahlen band of a cladding layer that offers advantages over both traditional dielectric waveguide and metal clad waveguides using surface plasmon polaritons.
ITO supports surface plasmon polaritons above 2.28 mum wavelength in symmetric glass-ITO-glass waveguides. Here, we report the dispersion relationship and experimental findings.
We report on a method to generate an interference pattern from a slit-groove structure. Although we have not used a double-slit, a Young like interference pattern is observed due to the effect of surface plasmons.
Near-field optical spectroscopy of nanoscale Ga droplets on GaAs exhibits quenching of photoluminescence emission due to coupling with surface plasmon. Ga droplets exhibit antenna like behavior associated with a red-shift in the near-field photoluminescence emission.
Three-dimensionally nano-structured metal surfaces containing nano-scale voids produce strong localised plasmons. We show here the correlation between physical structure and photonic and electronic properties for several significant applications.
Resonant coupling to highly confined plasmonic modes in a metal-dielectric nanoscale multilayer on top of a silicon guiding core is proposed for polarization control in silicon-on-insulator waveguides.
We propose to use low group velocity modes on a surface plasmon grating to mediate emission from colloidal quantum dots. We demonstrate the modification of emission wavelength and coupling as the grating periodicity is changed.
We have observed stimulated emission of surface plasmon polaritons (SPPs) propagating at the interface between a silver film and a film of optically pumped polymethyl methacrylate (PMMA) doped with rhodamine 6G (R6G) dye.
InAs quantum dots have been placed at different distances to a silver mirror. We extract the coupling of quantum dots to surface plasmon polaritons as a function of the distance by time-resolved spontaneous emission measurements.
We report on the coherent coupling between surface plasmon polaritons and quantum well excitons in a hybrid metal-semiconductor nanostructure. The coupling is probed by angle-resolved low temperature spectroscopy and analyzed within a coupled oscillator model.
The Q-factor of a localized plasmon cavity is enhanced significantly when allowing the plasmon to very slightly propagate as an SPP. The resulting mixed plasmon - plasmon polariton resonators retain sub-100 nm volume with enhanced Q-factors.
Polarization resolved detection of the scattered light by a gold nano-particle functionalized tip, off a propagating surface plasmon polariton wave enables quantitative studies of the image dipole orientation effects on flat metal surface.
We investigate sub-wavelength diffraction by a single slit, both in nano-optical and in terahertz regimes. The wave-front in optical regime separates itself into forward propagating beam and surface-bound 90-degree diffracted wave, i.e., surface plasmon polaritons.
We measure the femto-Newton forces produced by 2D surface plasmon optical traps able to trap micro-colloids at a patterned metal surface under low laser intensity.
Avalanche concentration, a rapid long-range accumulation of particles around a laser spot in a liquid sample, is demonstrated and characterized for VO2 nanorods. The effect is found to be driven by a convective flow in the sample, caused by efficient heating of VO2 nanorods that transition from insulator to metal within the laser spot.
The surface plasmon coupling between gold nanoparticles in a periodic array is theoretically modeled. The calculated dispersion relation and loss properties of an array of chains at air/glass interface agree well with FDTD simulation results.
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