Title

Terahertz Oscillating Devices Based Upon the Intrinsic Josephson Junctions in a High Temperature Superconductor

Authors

Authors

K. Delfanazari; H. Asai; M. Tsujimoto; T. Kashiwagi; T. Kitamura; K. Ishida; C. Watanabe; S. Sekimoto; T. Yamamoto; H. Minami; M. Tachiki; R. A. Klemm; T. Hattori;K. Kadowaki

Comments

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Abbreviated Journal Title

J. Infrared Millim. Terahertz Waves

Keywords

Superconductor; Intrinsic Josephson junctions; Ac-Josephson effect; Terahertz wave; Cavity resonance; SINGLE-CRYSTALLINE BI2SR2CACU2O8+DELTA; ANGULAR-DEPENDENCE; WAVE; EMISSION; RADIATION; MESAS; COHERENT; POWER; FLOW; Engineering, Electrical & Electronic; Optics; Physics, Applied

Abstract

Recent developments of coherent terahertz (THz) oscillators based on the intrinsic Josephson junctions (IJJs) in mesas of the high temperature superconductor Bi2Sr2CaCu2O8+delta are reviewed. Experimental and theoretical studies of the emission from equilateral, right-angled isosceles, and acute isosceles triangular mesas are compared with those obtained from rectangular, square, and disk mesas, in order to determine the role of the mesa geometry. The superconducting properties and emission frequency f spectra are presented for a variety of triangular mesa geometries. Analytic and finite difference time domain numerical calculations of the emissions from the internal electromagnetic (EM) cavity modes of triangular mesas are compared with experiment. The experimental f always satisfies the ac Josephson relation, and its narrow linewidth arises from the synchronized emissions from many IJJs. For some mesa geometries, f also strongly locks onto an EM cavity mode frequency, enhancing the emission's stability and output power. For other geometries, such cavity mode locking is weak, and f is highly tunable.

Journal Title

Journal of Infrared Millimeter and Terahertz Waves

Volume

35

Issue/Number

1

Publication Date

1-1-2014

Document Type

Article

DOI Link

http://dx.doi.org/10.1007/s10762-013-0027-y

Language

English

First Page

131

Last Page

146

WOS Identifier

WOS:000330956000014

ISSN

1866-6892

Recommended Citation

"Terahertz Oscillating Devices Based Upon the Intrinsic Josephson Junctions in a High Temperature Superconductor" (2014). Faculty Bibliography 2010s. 5245.
https://stars.library.ucf.edu/facultybib2010/5245