TY - JOUR
T1 - Low-noise 1.5 THz waveguide-type hot-electron bolometer mixers using relatively thick NbTiN superconducting film
AU - Shiino, Tatsuya
AU - Furuya, Ryuta
AU - Soma, Tatsuya
AU - Watanabe, Yoshimasa
AU - Sakai, Takeshi
AU - Jiang, Ling
AU - Maezawa, Hiroyuki
AU - Yamakura, Tetsuya
AU - Sakai, Nami
AU - Yamamoto, Satoshi
N1 - Publisher Copyright:
© 2015 The Japan Society of Applied Physics.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - 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.
AB - 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.
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U2 - 10.7567/JJAP.54.033101
DO - 10.7567/JJAP.54.033101
M3 - Article
AN - SCOPUS:84924239631
SN - 0021-4922
VL - 54
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 3
M1 - 033101
ER -