THz mixing properties of YBa2Cu3O7-δ grain boundary Josephson junctions on bicrystal substrates

J. Chen, H. Myoren, K. Nakajima, T. Yamashita

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Using high-Tc grain boundary Josephson junctions (GBJJs) made of YBa2Cu3O7-δ (YBCO) deposited across MgO bicrystal boundary, at TeraHertz (THz) waveband we successfully demonstrated both fundamental and harmonic frequency mixing. Radiation from a far-infrared (FIR) laser was coupled to the junction, which was integrated with a planar bow-tie antenna, via an extended hyperhemispherical silicon lens. Fundamental mixing manifested itself in the junction's DC current-voltage (I-V) curve as a third Shapiro step in addition to those two induced by the THz laser lines from a slightly misaligned resonator. In harmonic mixing between a THz laser line and a microwave local oscillator, the highest harmonic number we could get was 490 with a signal-to-noise-ratio of 9 dB at the intermediate frequency (IF). The IF output (PIF) depended strongly on the bias voltage, the local oscillator power level, the harmonic number (N), etc.

本文言語English
ページ(範囲)288-291
ページ数4
ジャーナルPhysica C: Superconductivity and its applications
293
1-4
DOI
出版ステータスPublished - 1997 12月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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