| Presentation | 1997/8/5 Terahertz Applications of High-Tc Josephson Junctions Hiroaki Myoren, Jian Chen, Kensuke Nakajima, Tsutomu Yamashita, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | From view point for THz applications, it is necessary to know the limit of upper frequency harmonic mixing properties and intrinsic noise of YBCO grain boundary Josephson junctions (GBJJs) at THz regime. A far infrared (FIR) laser pumped by a CO_2 gas laser was used as THz signal source and a silicon hyperhemispherical lens was used to guide FIR beam to the GBJJs. Microwave which was used as LO source and provided by a synthesized oscillator, was fed via a rigid coaxial line. IF output was amplified by a cooled HEMT IF amplifier and then detected by a spectrum analyzer. No more attempt was made to optimize the system. As a result, THz response has been demonstrated for the GBJJs. Also THz harmonic mixing with harmonic number (N) of about 490 has been achieved. Using two excited THz signals from a FIR laser, we successfully demonstrated fundamental frequency mixing. The intrinsic noise at THz range can be explained by the excess shot noise of the GBJJs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | High-Tc Josephson junctions / THz responses / THz mixer / intrinsic noise at THz range |
| Paper # | CPM97-67 |
| Date of Issue |
| Conference Information | |
| Committee | CPM |
|---|---|
| Conference Date | 1997/8/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Component Parts and Materials (CPM) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Terahertz Applications of High-Tc Josephson Junctions |
| Sub Title (in English) | |
| Keyword(1) | High-Tc Josephson junctions |
| Keyword(2) | THz responses |
| Keyword(3) | THz mixer |
| Keyword(4) | intrinsic noise at THz range |
| 1st Author's Name | Hiroaki Myoren |
| 1st Author's Affiliation | Research Institute of Electrical Communication, Tohoku University() |
| 2nd Author's Name | Jian Chen |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 3rd Author's Name | Kensuke Nakajima |
| 3rd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 4th Author's Name | Tsutomu Yamashita |
| 4th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 1997/8/5 |
| Paper # | CPM97-67 |
| Volume (vol) | vol.97 |
| Number (no) | 221 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |