AI Article Synopsis
- The study explores the generation of double-layer hybrid plasmonic modes using the finite element method, confirming the presence of standing even and odd modes.
- Advances are noted over Si grating, as the metallic grating addresses phase mismatch and functions as a magnetic polariton.
- The findings indicate that with oblique light, hybrid modes split spectra and that an efficiency of up to 90% can be achieved with the inclusion of a Salisbury screen, enabling the design of various graphene-based plasmonic devices.
Article Abstract
The excitation of double-layer hybrid plasmonic modes is investigated by the finite element method. The hybrid modes, verified as the standing even order of both symmetric and anti-symmetric modes, are effectively generated. There are several advances in comparison with using the Si grating: the metallic grating not only compensates phase mismatch, but also acts as a magnetic polariton. The dependences of each hybrid mode on the geometric parameters are analyzed respectively. Interestingly, a second spectra splitting occurs at each hybrid resonant mode with an obliquely incident light. At last, the excitation efficiency can be further enhanced to 90% using the Salisbury screen. The proposed hybrid system can be utilized to design various double-layer graphene-based plasmonic devices, including tunable optical switches, thermal emitters, multiband absorbers, sensors, etc.
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| http://dx.doi.org/10.1364/AO.416918 | DOI Listing |
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