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We present analysis of electromechanical effects associated with collective optical excitation of electrons in plasmonic nanoparticles, with emphasis on the enhanced transfer of angular momentum and nonlinear hydrodynamics such as vortex pairs.
Metallic nanostructures give rise to bright and dark plasmon modes, and through their interactions can support a variety of coherent phenomena more typically associated with atomic systems, providing new sensing and energy transfer strategies.
Loss in the metal is the main factor restricting practicality of plasmonic and metamaterial devices. In this tutorial the inevitability of the loss, its physical origins and the means to mitigate it will be considered
Plasmonic assisted nanodetectors and LEDs may be the only solution for power efficient onchip optical communications - the holy grail of integrated photonics. Localized plasmons in novel detectors and fast LEDs will be described in detail.
We present a fully integrated mid-infrared sensor. The laser and detector are fabricated from a bi-functional quantum cascade structure, connected through a dielectric-loaded surface plasmon waveguide, which acts as interaction zone and provides high coupling.
We use plasmonic antenna arrays to unidirectionally couple incident light in two different polarization states to long-range surface plasmon polariton waveguide modes propagating in opposite directions. The structures enable polarization-sorting with extinction rates in excess of 30dB.
We investigated a disordered plasmonic nanolens using an extensive campaign of FDTD simulations. Our results show that surface roughness plays a crucial role in the enhancement of the electromagnetic energy with respect to regular structures.
We propose novel 1.55-µm capsule-shaped metallic-cavity lasers with curved facets to reduce plasmonic losses. Significant reduction of threshold current from 291 µA to 60 µA is demonstrated with effective modal volume of 0.45 µm3.
Surface plasmon vortices with arbitrary pattern are synthesized via geometrical designs. The resulting vortex intensity patterns are experimentally measured using a near-field scanning optical microscope and are in good agreements as compared to numerical results.
Using a near-field scanning optical microscope we investigate the optical response of a plasmonic metasurface consisting of a sub-wavelength periodic pattern in an ultrathin (10nm) silver film, which shows extraordinarily suppressed transmission in the visible.
We experimentally demonstrate an infrared refractive index sensor based on plasmonic perfect absorbers for glucose concentration sensing, with the figure of merit (FOM*) around 55 and a bulk wavelength sensitivity around 600nm/RIU.
We identify a hybrid plasmonic slot waveguide capable of millimetre range transport and deep subwavelength nanofocusing by varying slot width. Convenient integration with the SOI platform provides an important bridge between plasmonics and silicon photonics.
Two resonant bands in enhanced optical transmission were predicted in a star shape bull's eye plasmonic structure. Fundamental and its second harmonic resonance were analyzed parametrically to find optimal conditions for linear and nonlinear responses.
We present a polarization rotator and coupler that rotates the TE0 mode in a silicon waveguide and couples to the hybrid plasmonic (HP0) mode. Coupling factor of ∼ 60% and polarization conversion efficiency of ∼ 90% is achieved.
Self-assembly approaches to construct plasmonic materials often result in high-symmetry structures within a thermodynamic limit. Here we demonstrate a novel selective self-assembly route for synthesis of a new class of nanoplasmonic structures with symmetry-breaking.
A metal/dielectric multilayered metasurface can be used to engineer the plasma frequency by controlling the ratio between the metal and dielectric layers. In this work, we demonstrate that a multilayered nanodisk metasurface based on semiconductor materials offers the design flexibility for tuning the plasmonic resonance.
500 MHz surface acoustic waves travel across a commensurate plasmonic grating coupler. A stroboscopic optical technique shows that the dynamic surface deformation deliberately modulates the coupler's efficiency by +/−2% during the ∼ 2ns acoustic cycle.
A planar layout for an ultra-compact plasmonic modulator is proposed and numerically investigated. Our device utilizes potentially CMOS compatible materials and can achieve 3-dB modulation in just 65nm and insertion loss <1dB at telecommunication wavelengths.
Opto-mechanical phenomena on nano-scale change balance between macroscopic forces and introduce novel quantum effects. Manipulation and control over nano-objects dynamics with plasmonics and metamaterials emphasizing radiation reaction recoil and all-optical modulation will be discussed.
We demonstrated electrically-driven subwavelength surface plasmonic nano-circuits integrating gap-plasmon emitting nano-LEDs and deep-subwavelength slot waveguides with a cross-sectional area of ∼0.016λ2 for the first time. Owing to the Purcell enhancement within the extremely small, metal-clad active region of the nano-LED, gap-plasmons are extracted efficiently. The gap-plasmons propagating along...
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