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We experimentally demonstrate spectrally broad (λ0=1200–1800 nm) in-plane negative diffraction of SPPs in an array of plasmonic channel waveguides with negative mutual coupling resulting in negative refraction on the array's interface and refocusing in an adjacent metal layer.
High confinement in plasmonic waveguides usually comes along with high loss. We present experiments on a new approach, which allows to tune adiabatically between high confinement and low loss waveguides, connected to optical Yagi-style antennas.
In a race to reduce the cost per Watt of solar generated power, there is generally a tradeoff between high efficiency and low cost. By going to thinner devices, less material can be used; however, clever light management designs must be utilized to avoid the loss in current caused by reduced absorption in a thin active layer. Here we discuss such design schemes incorporating either dielectric or metallic...
Light trapping via plasmonic nanostructures has emerged as a novel method for guiding and confining light in nanoscale photovoltaics. In our design, the metal nanostructures are built directly into the back contact of an a-Si:H device, such that the large scattering cross section of the plasmonic particles couples incident sunlight into localized and guided modes overlapping with the a-Si:H layer...
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.
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