Presentation | 1999/10/29 Fabrication and IF bandwidth measurement of NbN hot-electron bolometers Shigehito Miki, Yoshinori Uzawa, Akira Kawakami, Zhen Wang, Nobuyuki Kaya, |
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Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | We report on fabricating and testing hot electron bolometers with an ultrathin NbN film as heterodyne receivers operating at the terahertz frequencies. The NbN thin films were deposited on single-crystal MgO substrates by dc-magnetron sputtering at room temperature. The NbN films with an ultrathin thickness of 2.8 nm demonstrated good superconductivity with a high T_C of 9.8 K and a low resistivity of 185 μΩ cm at 20 K. The film structures, which were investigated by electron diffraction patterns and transmission electron micrographs, showed a single crystal structure with a (100) orientation. Hot-electron bolometers were constituted of 4.2-nm-thick NbN strip lines and Au contact pads integrated in a Al log-periodic antenna. We measured the intermediate frequency (IF) bandwidth in the millimeter wave region, and the mixer IF bandwidth was estimated to be 2.5 GHz at the 100 GHz band. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | terahertz / hot-electron bolometrer / IF bandwidth / NbN thin film |
Paper # | SCE99-25 |
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Conference Information | |
Committee | SCE |
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Conference Date | 1999/10/29(1days) |
Place (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Superconductive Electronics (SCE) |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Fabrication and IF bandwidth measurement of NbN hot-electron bolometers |
Sub Title (in English) | |
Keyword(1) | terahertz |
Keyword(2) | hot-electron bolometrer |
Keyword(3) | IF bandwidth |
Keyword(4) | NbN thin film |
1st Author's Name | Shigehito Miki |
1st Author's Affiliation | Graduate School of Science and Technology, Kobe University() |
2nd Author's Name | Yoshinori Uzawa |
2nd Author's Affiliation | Kansai Advance Research Center, Communication Research Laboratory |
3rd Author's Name | Akira Kawakami |
3rd Author's Affiliation | Kansai Advance Research Center, Communication Research Laboratory |
4th Author's Name | Zhen Wang |
4th Author's Affiliation | Kansai Advance Research Center, Communication Research Laboratory |
5th Author's Name | Nobuyuki Kaya |
5th Author's Affiliation | Graduate School of Science and Technology, Kobe University |
Date | 1999/10/29 |
Paper # | SCE99-25 |
Volume (vol) | vol.99 |
Number (no) | 408 |
Page | pp.pp.- |
#Pages | 7 |
Date of Issue |