LSPR Excitation on Au Nanorings From Integrated Hybrid Plasmonic Aperture Waveguide and Its Application in Methanol Detection in the IR-Band

Singh, Mandeep and Datta, Arnab (2019) LSPR Excitation on Au Nanorings From Integrated Hybrid Plasmonic Aperture Waveguide and Its Application in Methanol Detection in the IR-Band. IEEE Sensors Journal, 19 (15). pp. 6119-6125. ISSN 1530-437X

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Abstract

The presented work deals with an infra-red (IR)-band methanol sensor, which has been realized in an integrated device having hybrid plasmonic aperture waveguide and Au-nanoring array over broad wall of it covered by porous silicon clad. Through modeling and numerical simulations, we have shown that suitable synthesized aperture in the waveguide can excite localized surface plasmon resonance (LSPR) on the nanorings of suitable diameter via radiative field coupling, whereas LSPR can be tuned with the received methanol by the porous silicon clad. Thus, by contrasting the power available at the sense port of the waveguide with null and finite methanol doses, we have determined sensitivity (STM) and figure of merit (FOM) of the sensor, and our further analyses suggest that the sensor response can be tailored by diameter of aperture and ring, and by the porosity of the silicon cladding medium. In this respect, we have found that, for 20%–45% clad porosity, STM = 77.95–66.66 nm/RIU and FOM = 17.51–7.66/RIU can be achieved during methanol detection.

Item Type: Article
Uncontrolled Keywords: LSPR, Sensors, Methanol,Optical waveguides, Silicon, Couplings
Subjects: Engineering > MIT Manipal > Electronics and Communication
Depositing User: MIT Library
Date Deposited: 06 Aug 2019 09:43
Last Modified: 06 Aug 2019 09:43
URI: http://eprints.manipal.edu/id/eprint/154316

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