Abstract
It is shown theoretically and numerically that a metal-dielectric or an all-dielectric side-by-side gratings structure can support non-degenerate guided modes coupled to the same radation mode. This realizes an easy to fabricate, simple system supporting a nearly degenerate, efficiently coupled, double Fano resonance. The ensuing relatively narrow and high-visibility spectral line-shape can be useful for realizing ultra-thin optical filters.
Original language | English |
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Article number | 085002 |
Journal | Journal of Optics (United Kingdom) |
Volume | 20 |
Issue number | 8 |
DOIs | |
State | Published - 16 Jul 2018 |
Keywords
- double Fano resonance
- optics
- plasmons