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Surface Plasmon Resonance Sensing

  • Ibrahim Abdulhalim
  • Aug 29, 2021
  • 1 min read

Updated: 18 hours ago

A simple phase-shifted polarimetric scheme to extract light polarization changes induced by the sample in surface plasmon resonance (SPR) sensors is presented.

Illustration of surface plasmon resonance sensing showing polarized light interacting with a gold-coated prism and sensor response

Abstract

A simple phase-shifted polarimetric scheme to extract light polarization changes induced by the sample in surface plasmon resonance (SPR) sensors is presented. The proposed method is based on the conventional Kretschmann–Raether configuration in the angular diverging beam mode using a single wavelength and a variable liquid crystal retarder. An experimental demonstration was performed using different aqueous solutions of ethylene glycol showing a sensitivity of 118.7 deg/refractive-index-unit (RIU) and a detection limit of 1.03×10−7  RIU.


© 2019 Optical Society of America


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Phase-shifted polarimetric surface plasmon resonance sensor using a liquid crystal retarder and a diverging beam: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-44-7-1607

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