Abstract
In this letter, super-resolution imaging characteristics of Stampfli-triangle photonic crystal (STPC) and Stampfli-type photonic quasi-crystal (SPQC) flat lenses are investigated. Based on the negative refraction theory, the frequency range of negative refraction for super-resolution imaging of the lenses can be obtained through the band structure calculations of STPC. Due to similarities in the transmission spectra, the full width at half maximum, the sums of object and image distances and effective refractive indexes of both lenses, super-resolution imaging characteristics of SPQC flat lens can be approximately explained by the band structure of STPC and the negative refraction theory.
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