Simultaneous Measurement of Refractive Index and Temperature using LMR on planar waveguide

  • Omar Fuentes*
  • , Jesus M. Corres
  • , Ismel Dominguez
  • , Ignacio Del Villar
  • , Ignacio R. Matias
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

In this work a simultaneous refractive index and temperature sensor is presented. The optical structure consists of a soda-lime planar waveguide coated with CuO thin film for the generation of two separated Lossy Mode Resonances (LMRs). One section of the CuO thin film is in contact with the external medium while the other part is coated with a thick layer of PDMS. As result of this, two different resonances are obtained, centered at 600 nm and 1000 nm respectively. The first resonance wavelength is modified by the external medium refractive index, while the second one is only affected by the PDMS refractive index, that due to the thermo-optic effect can be used to measure the ambient temperature. Using this simple structure, a dual sensor has been obtained, showing an RI sensitivity of 1600 nm/RIU and a temperature sensitivity of 1.12 nm/C.

Original languageEnglish
Title of host publicationIEEE Sensors, SENSORS 2020 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728168012
DOIs
Publication statusPublished - 25 Oct 2020
Externally publishedYes
Event2020 IEEE Sensors, SENSORS 2020 - Virtual, Rotterdam, Netherlands
Duration: 25 Oct 202028 Oct 2020

Publication series

NameProceedings of IEEE Sensors
Volume2020-October
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229

Conference

Conference2020 IEEE Sensors, SENSORS 2020
Country/TerritoryNetherlands
CityVirtual, Rotterdam
Period25/10/2028/10/20

Keywords

  • lossy mode resonances
  • optical sensor
  • planar waveguide
  • refractive index
  • temperature

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