1 Ocak 2021 Dergi makalesi Açık Erişim

Gun, Berk N.; Yuce, Emre

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    <subfield code="a">Wavefront shaping assisted design of spectral splitters and solar concentrators</subfield>
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    <subfield code="a">Spectral splitters, as well as solar concentrators, are commonly designed and optimized using numerical methods. Here, we present an experimental method to spectrally split and concentrate broadband light (420-875 nm) via wavefront shaping. We manage to spatially control white light using a phase-only spatial light modulator. As a result, we are able to split and concentrate three frequency bands, namely red (560-875 nm), green (425-620 nm), and blue (420-535 nm), to two target spots with a total enhancement factor of 715%. Despite the significant overlap between the color channels, we obtain spectral splitting ratios as 52%, 57%, and 66% for red, green, and blue channels, respectively. We show that a higher number of adjustable superpixels ensures higher spectral splitting and concentration. We provide the methods to convert an optimized phase pattern into a diffractive optical element that can be fabricated at large scale and low cost. The experimental method that we introduce, for the first time, enables the optimization and design of SpliCons, which is similar to 300 times faster compared to the computational methods.</subfield>
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