| Presentation | 2014-04-17 Pair-breaking in superconducting thin films and the control of metamaterial properties by intense terahertz wave Iwao KAWAYAMA, Caihong ZHANG, Biaobing JIN, Jiaguang HAN, Hironaru MURAKAMI, Jingbo WU, Lin KANG, Jian CHEN, Peiheng WU, Masayoshi TONOUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | High-power terahertz time-domain spectroscopy (THz-TDS) was used to examine YBCO and NbN thin films when transmitted by intense single-cycle THz pulses. This allowed for an investigation of the nonlinear, time-resolved behavior of superconducting thin films in the presence of strong THz electric fields with the field strengths of tens of kV cm^<-1>. We also investigated the nonlinear effect of a superconducting metamaterial made from niobium nitride (NbN) at terahertz frequencies. As the variation of the incident intense terahertz field alters the intrinsic conductivity in the NbN, a consequent giant amplitude modulation is observed due to the strong nonlinearities. The high sensitivity of the chosen metamaterial even allows observing the nonlinear behaviors at various temperatures, but the resonance modulation induced by the nonlinear effect was distinct from that induced by the heating effect. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | superconductor / terahertz / nonlinear effect / metamaterial |
| Paper # | WPT2014-11,SCE2014-11,MW2014-11 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2014/4/10(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) | Pair-breaking in superconducting thin films and the control of metamaterial properties by intense terahertz wave |
| Sub Title (in English) | |
| Keyword(1) | superconductor |
| Keyword(2) | terahertz |
| Keyword(3) | nonlinear effect |
| Keyword(4) | metamaterial |
| 1st Author's Name | Iwao KAWAYAMA |
| 1st Author's Affiliation | Institute of Laser Engineering, Osaka University() |
| 2nd Author's Name | Caihong ZHANG |
| 2nd Author's Affiliation | Institute of Laser Engineering, Osaka University |
| 3rd Author's Name | Biaobing JIN |
| 3rd Author's Affiliation | Research Institute of Superconductor Electronics, Nanjing University |
| 4th Author's Name | Jiaguang HAN |
| 4th Author's Affiliation | Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University |
| 5th Author's Name | Hironaru MURAKAMI |
| 5th Author's Affiliation | Institute of Laser Engineering, Osaka University |
| 6th Author's Name | Jingbo WU |
| 6th Author's Affiliation | Research Institute of Superconductor Electronics, Nanjing University |
| 7th Author's Name | Lin KANG |
| 7th Author's Affiliation | Research Institute of Superconductor Electronics, Nanjing University |
| 8th Author's Name | Jian CHEN |
| 8th Author's Affiliation | Research Institute of Superconductor Electronics, Nanjing University |
| 9th Author's Name | Peiheng WU |
| 9th Author's Affiliation | Research Institute of Superconductor Electronics, Nanjing University |
| 10th Author's Name | Masayoshi TONOUCHI |
| 10th Author's Affiliation | Institute of Laser Engineering, Osaka University |
| Date | 2014-04-17 |
| Paper # | WPT2014-11,SCE2014-11,MW2014-11 |
| Volume (vol) | vol.114 |
| Number (no) | 10 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |