Experimental validation of a microstrip antenna model for high-Tc superconducting terahertz emitters
| Autor: | Yukino Ono, Hidetoshi Minami, Genki Kuwano, Youta Kaneko, Shinji Kusunose, Takuya Yuhara, T. Imai, Takanari Kashiwagi, Manabu Tsujimoto, Kazuo Kadowaki, Kanae Nagayama |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Superconductivity Materials science business.industry Terahertz radiation General Physics and Astronomy Resonance 02 engineering and technology Radiation 021001 nanoscience & nanotechnology 01 natural sciences Electromagnetic radiation Microstrip Microstrip antenna 0103 physical sciences Optoelectronics 0210 nano-technology business Excitation |
| Zdroj: | Journal of Applied Physics. 129:223905 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/5.0054018 |
| Popis: | We experimentally verified a proposed microstrip antenna model for high- T c superconducting coherent terahertz emitters. We attached conductive metal patches to single crystalline Bi 2Sr 2CuCu 2O 8 + δ mesas to probe the electromagnetic resonance conditions near the mesa sidewalls, where the coherent terahertz radiation is emitted. A systematic experiment reveals that an internal cavity resonance, which is an essential ingredient for outside radiation, remains unaltered by the presence of the ambient microstrip patterns. We found that an emission frequency is well predicted by the proposed model and that, in contrast to the conventional microstrip antenna, the internal cavity mode is more robust to the external microstrip patterns than expected from the proposed model. The experimental result requires us to modify the model to allow for a spontaneous synchronization of intrinsic Josephson oscillations that stimulates the stable excitation of the internal cavity resonance. |
| Databáze: | OpenAIRE |
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