| Presentation | 2003/4/16 Development of SIS Mixers using Single-crystal NbN Films in the Sub-mm Wave Region Akira KAWAKAMI, Yoshinori UZAWA, Masanori TAKEDA, Zhen WANG, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have developed SIS mixers at frequencies exceeding the Nb gap frequency using single crystal NbN films. We evaluated the DC and RF properties of the epitaxial NbN/MgO/NbN trilayers. The surface resistance of the epitaxial NbN films was estimated to be approximately 2.6-88 mΩ at 0.1-1.1 THz by using Josephson junctions with a microstrip resonator. These results indicate that epitaxially grown NbN/MgO/NbN trilayers can be used to produce devices that will work well for high-frequency superconducting applications in the frequency range between the Nb-gap to the NbN-gap frequencies. From the Fiske-step voltage, junction specific capacitance C_s was also estimated and they were about 70-120 fF/μm^2 at J_c = 40-3900 A/cm^2. An NbN/MgO/NbN SIS mixer was fabricated and the minimum DSB receiver noise temperature measured was 260 K at 795 GHz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | NbN / MeO / NbN / epitaxial / surface resistance / junction specific capacitance / SIS mixer |
| Paper # | SCE2003-8,MW2003-8 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2003/4/16(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) | Development of SIS Mixers using Single-crystal NbN Films in the Sub-mm Wave Region |
| Sub Title (in English) | |
| Keyword(1) | NbN |
| Keyword(2) | MeO |
| Keyword(3) | NbN |
| Keyword(4) | epitaxial |
| Keyword(5) | surface resistance |
| Keyword(6) | junction specific capacitance |
| Keyword(7) | SIS mixer |
| 1st Author's Name | Akira KAWAKAMI |
| 1st Author's Affiliation | Communications Research Laboratory() |
| 2nd Author's Name | Yoshinori UZAWA |
| 2nd Author's Affiliation | Communications Research Laboratory |
| 3rd Author's Name | Masanori TAKEDA |
| 3rd Author's Affiliation | Communications Research Laboratory |
| 4th Author's Name | Zhen WANG |
| 4th Author's Affiliation | Communications Research Laboratory |
| Date | 2003/4/16 |
| Paper # | SCE2003-8,MW2003-8 |
| Volume (vol) | vol.103 |
| Number (no) | 20 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |