| 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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| PDF Download Page | PDF download Page Link |
| 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) |
| Place (in English) | |
| Topics (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 | |