20 November 2017 Plasmon-induced transparency in a rectangle cavity and an H-shaped structure for sensing and switching applications
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Abstract
An implementation of plasmon-induced transparency (PIT) composed of a bus waveguide coupled to a rectangular nanocavity and an H-shape resonator is studied. It is shown that the wavelength, transmission, and width of the PIT peak can be tuned by adjusting the geometrical parameters of the H-resonator, such as the gap between the resonators, width, and position of the middle slit among the branches. For avoiding oxidization of the structure, the effect of coating a thin graphene layer on the inner walls of the H-resonator is investigated. It is shown that the proposed structure can be used as a nanosensor with a refractive index sensitivity of 1300 nm. RIU 1 and figure of merit equal to 59.1    RIU 1 and also as a compact nanoswitch with transmission 76% and a modulation depth equal to 19.77 dB.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yadollah Shahamat, Mohammad Vahedi, "Plasmon-induced transparency in a rectangle cavity and an H-shaped structure for sensing and switching applications," Journal of Nanophotonics 11(4), 046012 (20 November 2017). https://doi.org/10.1117/1.JNP.11.046012 . Submission: Received: 29 July 2017; Accepted: 6 November 2017
Received: 29 July 2017; Accepted: 6 November 2017; Published: 20 November 2017
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