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Multi-channel plasmonic waveguide filters with disk-shaped nanocavities

Lu, Hua, Liu, Xueming, Gong, Yongkang, Wang, Leiran and Mao, Dong 2011. Multi-channel plasmonic waveguide filters with disk-shaped nanocavities. Optics Communications 284 (10-11) , pp. 2613-2616. 10.1016/j.optcom.2011.01.046

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Abstract

A kind of multi-channel plasmonic filters based on metal–insulator–metal waveguides with disk-shaped nanocavities is proposed and numerically investigated. By calculating the resonant mode of disk-shaped nanocavity, it is found that the radius and refractive index of the nanocavity effectively control the resonance wavelength, which is consistent with the results obtained by finite-difference time-domain method. The characteristics of resonance spectra are influenced by the gap width between the cavity and waveguide, as can be exactly analyzed by temporal coupled mode theory. In addition, multi-channel plasmonic filters are achieved by increasing the number of nanocavity.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Elsevier
ISSN: 0030-4018
Date of Acceptance: 17 January 2011
Last Modified: 15 May 2019 13:00
URI: http://orca.cf.ac.uk/id/eprint/119615

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