Design and analysis of tunable multichannel transmission filters with a binary photonic crystal of silver/silicon
Department of Physics, Government Dungar College, 334001, Bikaner, Rajasthan, India
2 Department of Physics, SLAS, Mody University of Science and Technology, 332311, Lakshmangarh, Sikar, Rajasthan, India
3 Physics Department, Islamic University of Gaza, P.O. Box 108, Gaza, Palestine
Accepted: 23 November 2022
Published online: 2 December 2022
The present article is based on the analysis of multichannel transmission behavior of a 1D binary PC composed of silver/silicon. By using the transfer matrix method, the transmission spectra are plotted in various cases. PC exhibits a better response for multichannel transmission behavior with respect to sharpness in the case of TE mode compared to TM mode. With an increase in the thickness of layer B, the shifting in the transmission peaks is toward a low-frequency region contrary to the results in the case of increasing the thickness of layer A. Although the transmission peaks are equally spaced for fixed parameters, it shows multichannel filtering characteristics. Furthermore, PC gives better results for multichannel transmission behavior at low plasma frequency with less broadening. Finally, we demonstrate that the PC offers multichannel transmittance characteristics with increased number of unit cells, in which transmission peaks at low frequency are closely spaced as compared to those at higher frequencies. Hence, owing to diverse behavior of multichannel transmission of the PC in different cases, the insights of the article offer novel ideas to design optical devices, such as a multichannel filters, multispectral imaging and wavelength-division multiplexing systems.
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