Surface-plasmonic sensor using a columnar thin film in the grating-coupled configuration [Invited]

The excitation of a surface-plasmon-polariton (SPP) wave guided by a columnar thin film (CTF) deposited on a one-dimensional metallic surface-relief grating was investigated for sensing the refractive index of a fluid infiltrating that CTF. The Bruggemann homogenization formalism was used to determine the relative permittivity scalars of the CTF infiltrated by the fluid. The change in the refractive index of the fluid was sensed by determining the change in the incidence angle for which an SPP wave was excited on illumination by a p-polarized plane wave, when the plane of incidence was taken to coincide with the grating plane but not with the morphologically significant plane of the CTF. Multiple excitations of the same SPP wave were found to be possible, depending on the refractive index of the fluid, which can help increase the reliability of results by sensing the same fluid with more than one excitation of the SPP wave.

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Work Title Surface-plasmonic sensor using a columnar thin film in the grating-coupled configuration [Invited]
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Open Access
Creators
  1. Kiran Mujeeb
  2. Muhammad Faryad
  3. Akhlesh Lakhtakia
  4. Julio V. Urbina
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Chinese Optics Letters
Publication Date August 1, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.3788/COL202119.083601
Deposited November 15, 2021

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  • Created
  • Added Mujeeb_20_2v30A.pdf
  • Added Creator Kiran Mujeeb
  • Added Creator Muhammad Faryad
  • Added Creator Akhlesh Lakhtakia
  • Added Creator Julio V. Urbina
  • Published
  • Updated
  • Updated