Geometrical Full-Wavelength Resonance Mode Generating Terahertz Waves from a Single-Crystalline Bi2Sr2CaCu2O8+\delta Rectangular Mesa

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概要

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• The terahertz radiation from a rectangular mesa of single-crystalline Bi2Sr2CaCu2O8+\delta with dimensions of 80 \times 320 \times 1.6 μm3 fabricated by Ar and focused ion bean milling techniques was studied by Fourier transform infrared (FTIR) spectroscopy and angular distribution measurement of the radiation intensity. The emission measured using the FTIR spectrometer is centered at 0.9219 THz, which corresponds to exactly twice of that previously observed from mesas of the same width. The spectral width was as narrow as 7.5 GHz, which is limited by the instrumental resolution. The radiation obeys the ac Josephson relation and has a tunability of about 7% in frequency. The angular distribution of the emission power was analyzed using the conventional patch antenna theory. Both results strongly suggest that the excitation mode with a standing full-wavelength may be observed across the mesa width as the fundamental mode, instead of the half-wavelength mode commonly observed previously.

• 2011-09-15

著者

• Tachiki Masashi

  Institute For Materials Research Tohoku University

• Minami Hidetoshi

  Institute Of Applied Physics University Of Tsukuba

• Yamamoto Takashi

  Institute For Molecular Science

• Kashiwagi Takanari

  Institute Of Materials Science And Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Tsujimoto Manabu

  Institute Of Materials Science And Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Kadowaki Kazuo

  Institute Of Materials Science And Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Yamaki Kazuhiro

  Department of Advanced Interdisciplinary Sciences, Graduate School of Engineering, Utsunomiya University, Utsunomiiya 321-8585, Japan

• Orita Naoki

  Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Koike Takashi

  Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Nakayama Ryo

  Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Klemm Richard

  Department of Physics, University of Central Florida, Orlando, FL 32816, U.S.A.

• Deguchi Kouta

  Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Yamaki Kazuhiro

  Department of Electrical Engineering, Tokyo University of Science, Noda, Chiba 278-8510, Japan

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