Abstract In this paper, high-contrast asymmetric transmission film based on periodic one-dimensional photonic crystal with tunable air layers is presented for the spherical concentrator of the orb-shape membrane energy gathering array based space solar power station concept. As the thicknesses of the air gaps in the photonic crystal structure are precisely controlled, the optical transmission properties of the photonic crystals structure dynamically vary, allowing transmission of propagation waves in the forward direction but reflection in the reverse direction. The geometric parameters of the proposed photonic crystal structure are optimized to obtain both high forward transmittance and reverse reflectance over a broad operating wavelength range from 400 nm to 1200 nm and wide angle of incidence from 0° to 60°. The numerical simulations demonstrate that the average forward transmittance, reverse reflectance and the total solar ray collection ratio of the optimal structure amount to 99.3%, 95.2% and 94.5%, respectively.
Highlights Asymmetric transmission thin film for SSPS-OMEGA system is proposed. Asymmetric transmission is based on photonic crystal with tunable air layers. High contrast transmission is obtained on a wide wavelength and incident angle range. The total solar ray collection ratio of the optimal structures amount to 94.5%.
Photonic crystal with tunable air layers based asymmetric transmission film for space solar power station
Acta Astronautica ; 177 ; 1-8
2020-07-06
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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