| Abstrakt: |
By using the transfer matrix method (TMM), we analyse the transmission through a one-dimensional ternary photonic crystal (PC) in which a few nano-meters thick high temperature superconductor (YBCO) is integrated into the PC with two different dielectrics. We plot the transmission curves by changing the operating temperature (T), the superconducting layer thickness, and the superconductor itself. We find two large range frequency completely reflected regions, i.e., wide bands having a multichannel filter between them. If we increase the operating temperature, both the completely reflected frequency bandwidths decrease and are shifted towards lower frequency regime and exhibit red shifts. Contrary to it, if we increase the thickness of the SC layer, the completely reflected frequency bands increase and are shifted towards high frequency regime showing blue shifts. We have also seen the effect of temperature on the band gap for other superconductor HgBCCO, and it is found that the peak of YBCO is more sensitive to temperature variation. Multichannel filters having a good quality factor for all the peaks between two bandgaps in PCs provide a unique platform for controlling the propagation of light in specific and highly tunable ways, and showing suitable for sensing application. These features can be employed to make multi-channel filters and temperature sensors. Such superconducting photonic crystals may have other applications in low-temperature photonic devices, optical communication devices, waveguides and splitters, where high reflectivity is required. |
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