Abstract

One highly conductive noble metal structure with considerable optical transparency is proposed, which is constituted by two Si slabs with a thin seamless metallic film sandwiched in the middle. The high transmission is attributed to the two resonant cavities inside the two Si slabs. The maximal transmittance of 0.98 can be achieved, and the transmittance can over 0.8 in the broad wavelength range from 0.89 to 1.37 μm. In addition, realizing considerable optical transparency for a given wavelength can be fulfilled by tuning the thickness of the Si slab. The good performance makes our structure promising for practical applications in optoelectronics.

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