Circuit models of simultaneously biased intrinsic Josephson junction stacks for terahertz radiations in high-bias regime. (1st September 2022)

• Record Type: Journal Article
• Authors: Kobayashi, Ryota; Hayama, Ken; Kakeya, Itsuhiro
• Is Part Of: Applied physics express. Volume 15:Number 9(2022)
• Publication Date: 2022-09-01
• Subjects: Josephson effect -- terahertz radiation -- synchronized phenomena -- superconductivity; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/ac8597
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: Experiment-based circuit models for Josephson plasma emitters (JPEs) made of cuprate superconductor Bi2 Sr2 CaCu2 O8+ δ single crystals are proposed. Introducing an LCR resonator shunting an RCSJ parallel circuit allows us to reproduce experimental radiation intensity as a function of device voltage. Mismatch in the resonance frequencies of the total device and the LCR part is related to the wide-range tuning of the radiation frequency of JPE. It is found that coupling capacitances for simultaneously biased operations provide significant increases in radiation intensities, which have been reported as synchronized radiation from multiple mesas in the literature.