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In previous works, an efficient light trapping performed by arrays of metal nanoantennas whose building block was a slightly tapered (trapezoidal) substantially thick nanostrip was revealed. This light trapping implied a broad spectrum of solar light concentrated in a subwavelength depth of the semiconductor substrate. This is a very advantageous feature allowing our structure to enhance thin-film...
We study the efficiency of several types of all-dielectric light-trapping and antireflective coatings for the enhancement of photovoltaic absorption in thin-film silicon solar cells. We compare the photovoltaic absorption enhancement offered by a square array of nanovoids in the dielectric covering of the cell with that granted by a flat blooming layer, and a densely packed array of dielectric nanospheres.
We propose the enhancement of the photovoltaic absorption in thin-film solar cells using densely-packed arrays (not obviously regular) of non-absorbing submicron or micron-sized non-plasmonic spheres located on top of the cell. The spheres can decrease reflection forming an effective blooming layer but simultaneously they can suppress the transmission through the photovoltaic layer transforming the...
Interference, one of the major physical phenomena, relies on coherent superposition of waves, undertaking different phase lag. Considering vectorial near-fields structure, the fundamental concept was reconsidered, reformulated, and demonstrated at optical and radio frequencies.
We propose a new type of efficient light-trapping structures for thin-film solar cells based on arrays of planar nanoantennas whose operational band doesn't match with plasmonic resonances. The operation of our light-harvesting structures is based on the excitation of collective modes of the nanoantenna arrays whose electric field is localized between the adjacent metal elements. We demonstrate theoretically...
We have performed rigorous dispersion analysis and showed clearly impact of nonlocality on properties of multilayered metal-dielectric metamaterial. The main discovered effect is an appearance of additional extraordinary waves in the metamaterial which leads to the splitting of the TM-polarized beam at the air-metamaterial interface. Also, we have studied surface modes and Purcell effect in these...
We have accomplished rigorous dispersion analysis and showed clearly impact of nonlocality on properties of multilayered metal-dielectric metamaterial. The main discovered effect is an appearance of additional extraordinary waves in the metamaterial which leads to the splitting of the TM-polarized beam at the air-MDN interface.
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