Filtering properties of photonic crystal dual-channel tunable filter containing superconducting defects

Jia Wei Liu, Tsung Wen Chang, Chien-Jang Wu

    Research output: Contribution to journalArticle

    20 Citations (Scopus)


    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 S 1 (2/1) N S 2 (1/2) M . Here, 1 and 2 are dielectrics of SrTiO 3 and Al 2 O 3 , respectively. S 1 and S 2 are two high-temperature superconducting thin films taken to be the typical system, YBa 2 Cu 3 O 7-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 languageEnglish
    Pages (from-to)67-72
    Number of pages6
    JournalJournal of Superconductivity and Novel Magnetism
    Issue number1
    Publication statusPublished - 2014 Jan 1



    • Filter
    • Photonic band gap
    • Photonic crystal
    • Superconducting defect

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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