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Efficient Fabrication of Intrinsic-Josephson-Junction Terahertz Oscillators with Greatly Reduced Self-Heating Effects

Kashiwagi, T and Yamamoto, T and Minami, H and Tsujimoto, M and Yoshizaki, R and Delfanazari, K and Kitamura, T and Watanabe, C and Nakade, K and Yasui, T and Asanuma, K and Saiwai, Y and Shibano, Y and Enomoto, T and Kubo, H and Sakamoto, K and Katsuragawa, T and Marković, B and Mirković, J and Klemm, RA and Kadowaki, K (2015) Efficient Fabrication of Intrinsic-Josephson-Junction Terahertz Oscillators with Greatly Reduced Self-Heating Effects. Physical Review Applied, 4.

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Abstract

© 2015 American Physical Society. The intrinsic Josephson junctions (IJJs) in the high-Tc superconductor Bi2Sr2CaCu2O8+δ (Bi2212) are shown to have great potential for the construction of an oscillator emitting in the terahertz-frequency f regime. However, earlier devices with Bi2212 substrates exhibit strong self-heating effects detrimental to their operation and limiting the maximum f to approximately 1 THz. Here we describe an efficient fabrication procedure for a stand-alone-mesa IJJ terahertz oscillator with considerably reduced self-heating effects, greatly expanding the tunability and maximum value of f, potentially even to 15 THz. Their typical current-voltage characteristics, radiation tunability and power, and some practical uses are also 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 08:51
DOI: 10.1103/PhysRevApplied.4.054018