Abstract
In this work, we analyze filtering properties in a photonic crystal (PC) dual-channel tunable filter. The filter structure containing twin superconducting thin films is denoted as (1/2) M S1(2/1) N S2(1/2) M . Here, 1 and 2 are dielectrics of SrTiO3 and Al2O3, respectively. S1 and S2 are two high-temperature superconducting thin films taken to be the typical system, YBa2Cu3O7-x . The two channel frequencies can be designed to locate within the photonic band gap (PBG) of the original PC (1/2) M . Channel frequencies can be significantly changed by changing N, the stack number of the center PC. With the use of superconducting defects, channel frequencies are temperature-dependent, that is, the filter is thermally tunable. The proposed filter structure is of technical use in superconducting photonic applications at terahertz frequency.
Original language | English |
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Pages (from-to) | 67-72 |
Number of pages | 6 |
Journal | Journal of Superconductivity and Novel Magnetism |
Volume | 27 |
Issue number | 1 |
DOIs | |
State | Published - 01 2014 |
Keywords
- Filter
- Photonic band gap
- Photonic crystal
- Superconducting defect