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
Copyright Status
Unknown
Socpus ID
84899455248 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84899455248
STARS Citation
Delfanazari, Kaveh; Asai, Hidehiro; Tsujimoto, Manabu; Kashiwagi, Takanari; and Kitamura, Takeo, "Terahertz Oscillating Devices Based Upon The Intrinsic Josephson Junctions In A High Temperature Superconductor" (2014). Scopus Export 2010-2014. 9655.
https://stars.library.ucf.edu/scopus2010/9655