Temperature and Field Dependence of the Emission of Terahertz Waves from Intrinsic Josephson Junctions

ORAL

Abstract

We have recently succeeded in extracting coherent cw THz-radiation from intrinsic Josephson junctions in BSCCO [Science 318, 1291, (2007)]. An electromagnetic cavity resonance inside the sample generates a coherent state in which a large number of junctions are synchronized to oscillate in phase resulting in emission powers of up to 5 $\mu $W at frequencies up to 0.85 THz. The emission displays a non-monotonic temperature dependence with a sample dependent sharp maximum in the range of 25 to 45 K which we attribute to the interplay of self-heating effects and re-trapping of intrinsic junctions. Application of magnetic fields of less than 100 Oe parallel to the CuO$_{2}$ planes as well as perpendicular leads to the rapid suppression of the emission.

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Authors

  • Ulrich Welp

    Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA, Argonne National Laboratory, Argonne National Laboratory, Argonne, IL 60439, USA

  • Alex Koshelev

    Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA, Materials Science Division, Argonne National Laboratory, Argonne National Laboratory, Argonne, IL 60439, USA, Argonne National Laboratory

  • Lutfi Ozyuzer

    Izmir Institute of Technology, TR-35430 Izmir, Turkey

  • Cihan Kurter

    Argonne National Lab., Argonne National Laboratory, Argonne, IL 60439, USA, 2Izmir Institute of Technology, TR-35430 Izmir, Turkey

  • Masashi Tachiki

    The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8568, Japan

  • Kazuo Kadowaki

    University of Tsukuba, University of Tsukuba, Ibaraki-ken 305-8577, Japan, Institute of Materials Science, University of Tsukuba

  • Taku Yamamoto

    University of Tsukuba, University of Tsukuba, Ibaraki-ken 305-8577, Japan

  • Ken Gray

    Argonne National Laboratory, Argonne National Laboratory, Argonne, IL 60439, USA

  • Wai -K. Kwok

    Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA, Argonne National Lab,*Northern Illinois University, Argonne National Laboratory, Argonne National Lab, Argonne National Laboratory, Argonne, IL 60439, USA