Title

Terahertz Oscillating Devices Based Upon The Intrinsic Josephson Junctions In A High Temperature Superconductor

Keywords

Ac-Josephson effect; Cavity resonance; Intrinsic Josephson junctions; Superconductor; Terahertz wave

Abstract

Recent developments of coherent terahertz (THz) oscillators based on the intrinsic Josephson junctions (IJJs) in mesas of the high temperature superconductor Bi2Sr2CaCu2O8+δ 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. © Springer Science+Business Media New York 2013.

Publication Date

1-1-2014

Publication Title

Journal of Infrared, Millimeter, and Terahertz Waves

Volume

35

Issue

1

Number of Pages

131-146

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10762-013-0027-y

Socpus ID

84899455248 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84899455248

This document is currently not available here.

Share

COinS