Development of high-Tc superconducting THz emitters

Conference paper (2019)

Authors

T. Kashiwagi University of Tsukuba
S. Nakagawa University of Tsukuba
K. Kadowaki University of Tsukuba
T. Imai University of Tsukuba
G. Kuwano University of Tsukuba
Y. Kaneko University of Tsukuba
Y. Ono University of Tsukuba
S. Kusunose University of Tsukuba
T. Yamamoto QuTech Advanced Research Centre, Quantum Internet Division
H. Minami University of Tsukuba
M. Tsujimoto University of Tsukuba
Affiliation
QuTech Advanced Research Centre
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Published Date

2019

Language

English

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Affiliation

QuTech Advanced Research Centre

Abstract

Since the discovery of continuous, coherent THz radiation from intrinsic Josephson junctions (IJJs) constructed in the single crystals of Bi2Sr2CaCu2O8+δ in 2007, various types of device structures have been developed. Thermal management of Joule heat in the IJJ mesa structure is the most important issue to improve the radiation characteristics of the IJJ-THz emitters. The radiation frequencies ranging from 0.3 to 2.4 THz, the emission power of $ \sim 30$ pW/mesa and the radiation linewidth of 0.2 GHz at $ \sim 0.5$ THz were obtained from the thermal managed device structures so far. We show a brief overview of the IJJ-THz emitters in our group.