Terahertz superconducting plasmonic hole array |
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Authors: | Tian Zhen Singh Ranjan Han Jiaguang Gu Jianqiang Xing Qirong Wu Judy Zhang Weili |
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Institution: | Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, China. |
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Abstract: | We demonstrate a superconductor array of subwavelength holes with active thermal control over the resonant transmission induced by surface plasmon polaritons. The array was lithographically fabricated on a high-temperature yttrium barium copper oxide superconductor and characterized by terahertz time-domain spectroscopy. We observe a clear transition from a virtual excitation of the surface plasmon mode to a real surface plasmon mode. The highly controllable superconducting plasmonic crystals may find promising applications in the design of low-loss, large- dynamic-range amplitude modulation and surface-plasmon-based terahertz devices. |
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