Analytical Evaluation of Radiation Properties in Terahertz-wave Oscillators using Bi-2212 Intrinsic Josephson Junctions

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  • TACHIKI Takashi
    Department of Electrical and Electronic Engineering,National Defense Academy
  • KATADA Hiroshi
    Department of Electrical and Electronic Engineering,National Defense Academy
  • UCHIDA Takashi
    Department of Electrical and Electronic Engineering,National Defense Academy

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Other Title
  • Bi-2212 固有ジョセフソン接合を用いたテラヘルツ波発振素子の放射特性の解析
  • Bi-2212 コユウ ジョセフソン セツゴウ オ モチイタ テラヘルツハ ハッシン ソシ ノ ホウシャ トクセイ ノ カイセキ

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Abstract

To calculate the radiation properties of terahertz-wave oscillators using intrinsic Josephson junctions, an analytical solution of the coupled sine-Gordon equation was obtained by applying continuous approximation and a radiation boundary condition in a 3D model for the oscillator mesa. The I-V characteristics, electromagnetic field distributions and bias dependence of radiation power were obtained by the analytical solution. These properties agree well with experimental results obtained from the oscillator fabricated from a Bi2Sr2CaCu2O8+δrectangular mesa with 78 μm wide, 138 μm long and 1.1 μm high. The analytical formulae are useful for designing the oscillator using the intrinsic Josephson junctions for practical applications.

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