Long-Range Spoof Surface Plasmons(LRSSP) on the Asymmetric Double Metal Gratings
نویسندگان
چکیده
Spoof surface plasmons (SSP) on the corrugated metal surfaces have been widely studied over past decade in both microwave and Terahertz (THz) band. Previous studies show that SSP mode grating suffers from high dissipative losses THz band especially near asymptotic frequency which may limit its real applications. The issue can be addressed by utilizing long-range (LRSSP). LRSSP is a special low-loss symmetric propagating wave along double-layer metallic waveguides. In this paper, asymmetric double gratings are proposed to support significantly reduce damping of other short-range (SRSSP) conventional doubly-corrugated surfaces, thus enabling new possibilities SRSSP within manner. According our dispersion theory numerical calculations, propagation loss still lower than regime, demonstrates good tolerance asymmetry structure. However, superiority vanishes gradually as degree enlarged. This work provides an alternative approach increase length open up avenues develop some novel LRSSP-based plasmonic devices such waveguides, filters, sensors active powerful radiation sources induced energy beam below optical spectrum.
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ژورنال
عنوان ژورنال: IEEE Photonics Journal
سال: 2021
ISSN: ['1943-0655', '1943-0647']
DOI: https://doi.org/10.1109/jphot.2021.3070880