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The spatial heterodyne Fourier transform spectrometer achieves 13 cm−1 resolution in mid-infrared, indicating its advanced spectral capabilities.
Suspended silicon waveguides with metamaterial cladding are used to implement a spatial heterodyne Fourier transform (SHFT) spectrometer operating near 5.5 µ m wavelength. This device offers a resolution of 13 cm − 1 and bandwidth of 100 cm − 1 .
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Rodriguez et al. (2025) studied this question.
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