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

Mandeep Singh, Arnab Datta

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number8680060
Pages (from-to)6119-6125
Number of pages7
JournalIEEE Sensors Journal
Volume19
Issue number15
DOIs
Publication statusPublished - 01-08-2019

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Nanorings
Surface plasmon resonance
surface plasmon resonance
Waveguides
Methanol
methyl alcohol
apertures
Infrared radiation
waveguides
Porous silicon
porous silicon
figure of merit
excitation
sensors
Sensors
Porosity
porosity
Silicon
dosage
sensitivity

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

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title = "LSPR Excitation on Au Nanorings From Integrated Hybrid Plasmonic Aperture Waveguide and Its Application in Methanol Detection in the IR-Band",
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.",
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LSPR Excitation on Au Nanorings From Integrated Hybrid Plasmonic Aperture Waveguide and Its Application in Methanol Detection in the IR-Band. / Singh, Mandeep; Datta, Arnab.

In: IEEE Sensors Journal, Vol. 19, No. 15, 8680060, 01.08.2019, p. 6119-6125.

Research output: Contribution to journalArticle

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