Generation of electromagnetic waves from 0.3 to 1.6 terahertz with a high- Tc superconducting Bi2Sr2CaCu2O8+δ intrinsic Josephson junction emitter

Kashiwagi, T. et al. (2015) Generation of electromagnetic waves from 0.3 to 1.6 terahertz with a high- Tc superconducting Bi2Sr2CaCu2O8+δ intrinsic Josephson junction emitter. Applied Physics Letters, 106(9), 092601. (doi: 10.1063/1.4914083)

Abstract

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: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Delfanazari, Dr Kaveh
• Authors: Kashiwagi, T., Yamamoto, T., Kitamura, T., Asanuma, K., Watanabe, C., Nakade, K., Yasui, T., Saiwai, Y., Shibano, Y., Kubo, H., Sakamoto, K., Katsuragawa, T., Tsujimoto, M., Delfanazari, K., Yoshizaki, R., Minami, H., Klemm, R. A., and Kadowaki, K.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118
• Published Online: 04 March 2015
• Copyright Holders: Copyright © 2015 AIP Publishing LLC
• First Published: First published in Applied Physics Letters 106(9):092601
• Publisher Policy: Reproduced in accordance with the publisher copyright policy