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Opt Lett. 2010 Nov 1;35(21):3586-8. doi: 10.1364/OL.35.003586.

Terahertz superconducting plasmonic hole array.

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  • 1Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, China.

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.

PMID:
21042358
[PubMed]
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