Bowtie plasmonic nanoantenna arrays for polarimetric optical biosensing

Jonathan Calderón, Jesús Álvarez, Juan Martínez-Pastor, Daniel Hill

Research output: Contribution to journalConference articlepeer-review


We report on the first polarimetric plasmonic biosensor based on arrays of bowtie nanoantennas. Using the Finite Element Method (FEM) the phase retardation between the components of light polarized parallel and perpendicular to the axis of the nanoantennas is studied. After optimizing them for high volumetric sensitivity at a wavelength of 780 nm, sensitivities ~5 rad/RIU are obtained, corresponding to a detection limit ~10-7 RIU when using the polarimetric readout platform. Surface sensitivity values resulted from studies of phase retardation changes from a coverage of bioreceptors and analytes.

Original languageEnglish
Article number89330I
JournalProceedings of SPIE - International Society for Optical Engineering
Publication statusPublished - 5 Mar 2014
EventFrontiers in Biological Detection: From Nanosensors to Systems VI - San Francisco, CA, United States
Duration: 1 Feb 20142 Feb 2014

Bibliographical note

Copyright 2014 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • FEM simulations
  • gold bowties
  • LSPR
  • nanoantenna arrays
  • optical sensing and biosensing
  • phase retardation
  • polarimetry
  • surface plasmon polaritons


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