CUED Publications database

Excitation mode characteristics in Bi2212 rectangular mesa structures

Kashiwagi, T and Deguchi, K and Tsujimoto, M and Koike, T and Orita, N and Delfanazari, K and Nakayama, R and Kitamura, T and Hagino, S and Sawamura, M and Yamamoto, T and Minami, H and Kadowaki, K (2012) Excitation mode characteristics in Bi2212 rectangular mesa structures. Journal of Physics: Conference Series, 400. ISSN 1742-6588

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The rectangular mesa structure of single crystalline Bi2Sr 2CaCu2O8+δ with the dimensions of 64 × 135 × 1.35 μm3 was fabricated by using Ar-ion milling with a metallic mask and focused ion beam. From this mesa, the radiation frequencies of 24.226 cm-1 and 17.296 cm-1 were observed at the different temperatures of 25 K and 40 K, respectively. The change of the radiation frequencies is also obviously reflected in the radiation pattern measurement. The radiation pattern observed at lower temperature seems to have an asymmetric shape and its intensity as a whole is slightly weak. In the higher temperature, however, the radiation intensity increases and the radiation pattern becomes almost symmetric shape. The radiation characteristics observed at higher temperature is well explained by the fundamental cavity resonance mode expected from the width of the mesa. This result may give us not only the suggestion of the existence of the adequate matching condition between the geometrical cavity and the ac Josephson current in the mesa but also the guide for the designing of the high efficiency of the radiation. © Published under licence by IOP Publishing Ltd.

Item Type: Article
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: 10.1088/1742-6596/400/2/022050