Abstract
A novel tunable filter including the absorbent plasma layer affected by twisted electromagnetic beam propagation is indicated. The presented photonic crystal is composed by SiO2 and free space with one absorbent plasma defect layer, and that the transmittance and reflectance spectra are studied by using Transfer Matrix Method. It is found out that the transmittance spectrum can be adjusted by the plasma absorption rate, vortex charge number or intensity of incident laser beam. The dependence of the transmittance, reflectance and absorptivity spectra to the transverse coordinate is surveyed, particularly when a change in vortex charge number is applied.
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