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In this work we reported a photonic thermal light emitter based on double coincide rings-patterned photonic crystal structure of highly-doped silicon coated with platinum. The structure periodicity is 2 μm and the rest of design dimensions were tuned to achieve either a wideband or multi-band wavelength range in the near and mid-infrared spectral ranges. Finite difference time domain analysis showed that a wide spectral range with a 3-dB spectral width of 3.7 μm around 2.5 μm central wavelength or dual-band operation with 3-dB spectral widths of 2.5 μm and 3 around 1.5 and 7 μm central wavelengths, respectively could be achieved.
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