Finite-difference time-domain studies of low-frequency stop band in superconductor-dielectric superlattice |
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Authors: | Wang Shen-Yun Liu Shao-Bin and Le-Wei Joshua Li |
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Institution: | College of Information Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China; Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore |
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Abstract: | The transmission coefficients of electromagnetic (EM) waves due to a superconductor-dielectric superlattice are numerically calculated. Shift operator finite difference time domain (SO-FDTD) method is used in the analysis. By using the SO-FDTD method, the transmission spectrum is obtained and its characteristics are investigated for different thicknesses of superconductor layers and dielectric layers, from which a stop band starting from zero frequency can be apparently observed. The relation between this low-frequency stop band and relative temperature, and also the London penetration depth at a superconductor temperature of zero degree are discussed, separately. The low-frequency stop band properties of superconductor-dielectric superlattice thus are well disclosed. |
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Keywords: | shift operator finite difference time domain method superconductor superconductor-dielectric superlattice high-pass filter |
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