Abstract：
:We show a hybrid structure consisting of Si film with photonic crystal surface and random triangular gold grooves reflector at the bottom, which is capable of realizing efficient, broad-band, wide-angle optical absorption. It is numerically demonstrated that the enhanced absorption in a broad wavelength range (0.3-9.9 μm) due to the scattering effect of both sides of the structure and the created resonance modes. Larger thickness and period are favored to enhance the absorption in broader wavelength range. Substantial electric field concentrates in the grooves of surface photonic crystal and in the Si film. Our structure is versatile for solar cells, broadband photodetection and stealth coating.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Chen ZH,Qiao N,Yang Y,Ye H,Liu S,Wang W,Wang Ydoi
10.1038/srep12794subject
Has Abstractpub_date
2015-08-04 00:00:00pages
12794issn
2045-2322pii
srep12794journal_volume
5pub_type
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