Akademik Veri Yönetim Sistemi
PVCON 2020, Ankara, Türkiye, 30 Kasım - 02 Aralık 2020, ss.39
Harvesting energy from a broad-spectrum light with high efficiency is a long-standing endeavor given
the increasingly important energy source yet to be exploited further: sunlight. No material alone can
derive energy from a broadband light with high efficiency. That being the case, the methods benefitting
from spectral sub-bands together with concentration are in demand to utilize record level efficiency in
photovoltaic cells. It is possible to get these sub-bands by portioning a broadband light through spectral
splitting. Spectral splitters are generally realized via computational methods. Here, we present an
experimental method to spectrally split and concentrate broadband light via controlling the wavefront
of the incident light. We have chosen particular concentration spots for red (560 nm - 875 nm), green
(425 nm – 620 nm), and blue (420 nm – 535 nm) frequency bands within the broad-spectrum. Encoding
different diffractive patterns onto the SLM, we manage to generate dynamic phase plates that enable
experimental control on the spatial phase of the incident light. The concentration of light is achieved
with a total enhancement factor of 564 %. The spectral splitting ratios that we obtain are 43 %, 37 % and
34 % for red, green, and blue channels, respectively. The method that we offer is faster than the
computational methods given the fast response time of the spatial light modulator within 17 ms. This
duration is much shorter than the time spent for calculating diffractive optical elements. We provide an
experimental method that can increase the impact of diffractive optical elements (DOE) by providing the
means to design efficient and effective DOEs within a very short time. Thereby, the output intensity
profile of light that passes through the phase plate is measured and altered within this short duration
providing a faster total computational time than a calculation of the output intensity distribution at the
target plane. This study is financially supported by The Scientific and Technological Research Council of
Turkey (TÜBİTAK), grant no 118F075.