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Generation of electromagnetic waves from 0.3 to 1.6 terahertz with a high- T c superconducting Bi<inf>2</inf>Sr<inf>2</inf>CaCu<inf>2</inf>O<inf>8+</inf><inf>δ</inf> intrinsic Josephson junction emitter

Kashiwagi, T and Yamamoto, T and Kitamura, T and Asanuma, K and Watanabe, C and Nakade, K and Yasui, T and Saiwai, Y and Shibano, Y and Kubo, H and Sakamoto, K and Katsuragawa, T and Tsujimoto, M and Delfanazari, K and Yoshizaki, R and Minami, H and Klemm, RA and Kadowaki, K (2015) Generation of electromagnetic waves from 0.3 to 1.6 terahertz with a high- T c superconducting Bi<inf>2</inf>Sr<inf>2</inf>CaCu<inf>2</inf>O<inf>8+</inf><inf>δ</inf> intrinsic Josephson junction emitter. Applied Physics Letters, 106. ISSN 0003-6951

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Abstract

© 2015 AIP Publishing LLC. To obtain higher power P and frequency f emissions from the intrinsic Josephson junctions in a high-Tc superconducting Bi2Sr2CaCu2O8+δ single crystal, we embedded a rectangular stand-alone mesa of that material in a sandwich structure to allow for efficient heat exhaust. By varying the current-voltage (I-V) bias conditions and the bath temperature Tb, f is tunable from 0.3 to 1.6 THz. The maximum P of a few tens of μW, an order of magnitude greater than from previous devices, was found at Tb∼55 K on an inner I-V branch at the TM(1,0) cavity resonance mode frequency. The highest f of 1.6 THz was found at Tb=10 K on an inner I-V branch, but away from cavity resonance frequencies. A possible explanation is presented.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:00
Last Modified: 24 Nov 2020 08:52
DOI: 10.1063/1.4914083