23 May 2016 Design of an ultra-broadband and polarization-insensitive solar absorber using a circular-shaped ring resonator
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Abstract
An ultra-broadband and polarization-independent metamaterial absorber consisting of a chromium circular-shaped ring resonator embedded in a dielectric layer and a chromium ground plane is numerically investigated in the solar spectrum. Simulation results show that the absorber can obtain the average absorption of 95.5% over most the solar spectrum, near-infrared, and short-wavelength infrared regime (400 to 2500 nm). The absorption mechanism of the ultra-broadband metamaterial absorber originates from the overlapping of two different resonance wavelengths. In particular, the electromagnetic energy is almost completely dissipated in the chromium layer, which makes it independent on the loss of the dielectric layer and widens the range of choices for potential dielectric materials. Our designed absorber has high practical feasibility and appears to be very promising for solar energy harvesting, thermal imaging, and emissivity control applications.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Dan Hu, Dan Hu, Hong-Yan Wang, Hong-Yan Wang, Qiao-Fen Zhu, Qiao-Fen Zhu, } "Design of an ultra-broadband and polarization-insensitive solar absorber using a circular-shaped ring resonator," Journal of Nanophotonics 10(2), 026021 (23 May 2016). https://doi.org/10.1117/1.JNP.10.026021 . Submission:
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