Affiliation:
1. University of Michigan, Ann Arbor, MI 48109, USA
2. Southern University of Science and Technology, Shenzhen, People's Republic of China
Abstract
Spoof surface plasmon polariton (SSPP) is an exotic electromagnetic state that confines light at a subwavelength scale at a design-specific frequency. It has been known for a while that spoof plasmon mode can exist in planar, thin structures with dispersion properties similar to that of its wide three-dimensional structure counterpart. We, however, have shown that spoof plasmons in thin structures possess some unique properties that remain unexplored. Our analysis reveals that the field interior to SSPP waveguide can achieve an exceptional hyperbolic spatial dependence, which can explain why spoof plasma resonance incurs red-shift with the reduction of the waveguide thickness, whereas common wisdom suggests frequency blue-shift of a resonant structure with its size reduction. In addition, we show that strong confinement can be achieved over a wide band in thin spoof plasmon structure, ranging from the spoof plasma frequency up to a lower frequency considerably away from the resonant point. The nature of lateral confinement in thin SSPP structures may enable interesting applications involving fast modulation rate due to enhanced sensitivity of optical modes without compromising modal confinement.
Funder
Air Force Office of Scientific Research
National Science Foundation
Subject
General Physics and Astronomy,General Engineering,General Mathematics
Cited by
4 articles.
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1. Spoof surface plasmonics: principle, design, and applications;Journal of Physics: Condensed Matter;2022-04-28
2. Active odd-mode-metachannel for single-conductor systems;Opto-Electronic Advances;2022
3. A Reconfigurable Interconnect Technology based on Spoof Plasmon;2019 IEEE 19th International Conference on Nanotechnology (IEEE-NANO);2019-07
4. Correction to: Properties of spoof plasmon in thin structures;Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences;2019-02