High Temperature Superconductor Terahertz Emitters: Fundamental Physics and Its Applications

    Authors

    T. Kashiwagi; M. Tsujimoto; T. Yamamoto; H. Minami; K. Yamaki; K. Delfanazari; K. Deguchi; N. Orita; T. Koike; R. Nakayama; T. Kitamura; M. Sawamura; S. Hagino; K. Ishida; K. Ivanovic; H. Asai; M. Tachiki; R. A. Klemm;K. Kadowaki

    Comments

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    Abbreviated Journal Title

    Jpn. J. Appl. Phys.

    Keywords

    INTRINSIC JOSEPHSON-JUNCTIONS; RESONANT-TUNNELING DIODES; FLUX-FLOW; OSCILLATORS; MESA STRUCTURES; THZ RADIATION; T-C; SINGLE-CRYSTALS; VORTEX FLOW; EMISSION; BI2SR2CACU2O8+DELTA; Physics, Applied

    Abstract

    Coherent and continuous radiation sources of the electromagnetic (EM) waves at terahertz (1 THz = 10(12) c/s) frequencies using a mesa structure fabricated from high temperature superconducting Bi2Sr2CaCu2O8-delta single crystals are described with a special emphasis on the physics of the radiation mechanism and the applications. After the intensive studies of many mesas fabricated with different conditions, it is revealed that the ac-Josephson effect works as a primary driving mechanism of the radiation and the cavity resonance needed for stronger radiation plays an additional role to the mechanism, although both are working together while radiating. A prototype of the imaging machine for multipurpose uses has successfully been developed. (C) 2012 The Japan Society of Applied Physics

    Journal Title

    Japanese Journal of Applied Physics

    Volume

    51

    Issue/Number

    1

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    14

    WOS Identifier

    WOS:000300296900020

    ISSN

    0021-4922

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