Low-noise 1.5 THz waveguide-type hot-electron bolometer mixers using relatively thick NbTiN superconducting film

Tatsuya Shiino, Ryuta Furuya, Tatsuya Soma, Yoshimasa Watanabe, Takeshi Sakai, Ling Jiang, Hiroyuki Maezawa, Tetsuya Yamakura, Nami Sakai, Satoshi Yamamoto

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have developed waveguide-type low-noise superconducting hot-electron bolometer (HEB) mixers for astronomical observations in the 1.3-1.5 THz region by using a relatively thick NbTiN superconducting film (10.8 nm). We have achieved a receiver noise temperature of 490K (DSB: double side band) at 1.475 THz. This noise temperature corresponds to seven times the quantum noise. According to gain bandwidth measurements, the contribution of diffusion cooling is found to be responsible for such a good noise performance.

本文言語English
論文番号033101
ジャーナルJapanese Journal of Applied Physics
54
3
DOI
出版ステータスPublished - 2015 3月 1
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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