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An embedded optical nanowire loop resonator refractometric sensor.

Fei Xu1, Valerio Pruneri, Vittoria Finazzi

  • 1Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, United Kingdom. fex@orc.soton.ac.uk

Optics Express
|June 11, 2008
PubMed
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A new optical sensor using a nanowire loop resonator offers sensitive detection. Its performance is optimized by controlling nanowire size and coating thickness for refractometric measurements.

Area of Science:

  • Optoelectronics
  • Nanophotonics
  • Sensor Technology

Background:

  • Refractive index sensing is crucial for various applications.
  • Optical resonators offer high sensitivity for refractive index detection.
  • Nanowire-based devices provide miniaturization and enhanced light-matter interaction.

Purpose of the Study:

  • To present a novel refractometric sensor.
  • To investigate the sensor's sensitivity in different configurations.
  • To determine the influence of physical parameters on sensor performance.

Main Methods:

  • Fabrication of an optical sensor utilizing an embedded optical nanowire loop resonator.
  • Experimental characterization of the sensor's sensitivity.
  • Systematic analysis of the impact of nanowire diameter and coating thickness.

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Main Results:

  • The developed sensor demonstrates effective refractometric sensing capabilities.
  • Sensitivity was evaluated across two distinct operational configurations.
  • A clear dependence of sensitivity on nanowire diameter and coating thickness was established.

Conclusions:

  • The embedded optical nanowire loop resonator is a promising platform for refractometric sensing.
  • Optimizing nanowire dimensions and coating is key to maximizing sensor sensitivity.
  • This work provides insights for designing advanced optical nanosensors.