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This paper addresses a wideband reflector constructed using just a single-layer subwavelength grating with multi-subpart profiles. The properties of the grating reflector are investigated by rigorous coupled-wave analysis. It is shown that for a transverse electric (TE) polarized wave, over a broadband spectrum of 1.47–2.1 μm, the reflector demonstrates high reflectivity ( R 0 > 98.5%) and a wide angular bandwidth (about 28°) at 1.8 μm. The effects of deviation from the design parameters on the reflection spectra are also presented.
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Wu et al. (2013) studied this question.
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