Design and characterization of microstrip patch antennas for high-Tc superconducting terahertz emitters
| Autor: | Youta Kaneko, Kazuo Kadowaki, Manabu Tsujimoto, Takanari Kashiwagi, Genki Kuwano, Shinji Kusunose, T. Imai, Wai-Kwong Kwok, Ulrich Welp, Yilmaz Simsek, Yukino Ono, Hidetoshi Minami, Kanae Nagayama |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Terahertz radiation business.industry Axial ratio Impedance matching Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Atomic and Molecular Physics and Optics Microstrip Terahertz spectroscopy and technology 010309 optics Optics Condensed Matter::Superconductivity 0103 physical sciences Antenna (radio) 0210 nano-technology business Common emitter |
| Zdroj: | Optics Express. 29:16980 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.420417 |
| Popis: | We designed and characterized a microstrip pattern of planar patch antennas compatible with a cuprate high-T c superconducting terahertz emitter. Antenna parameters were optimized using an electromagnetic simulator. We observed repeatable sub-terahertz emissions from each mesa fabricated on identical Bi2Sr2CaCu2O8+δ base crystals in a continuous frequency range of 0.35–0.85 THz. Although there was no significant output power enhancement, a plateau behavior at a fixed frequency was observed below 40 K, indicating moderate impedance matching attributable to the ambient microstrip pattern. A remarkably anisotropic polarization at an axial ratio of up to 16.9 indicates a mode-locking effect. Our results enable constructing compactly assembled, monolithic, and broadly tunable superconducting terahertz sources. |
| Databáze: | OpenAIRE |
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