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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 6 — Mar. 24, 2014
  • pp: 6881–6898

Quasi-droplet microbubbles for high resolution sensing applications

Yong Yang, Jonathan Ward, and Síle Nic Chormaic  »View Author Affiliations


Optics Express, Vol. 22, Issue 6, pp. 6881-6898 (2014)
http://dx.doi.org/10.1364/OE.22.006881


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Abstract

Optical properties and sensing capabilities of fused silica microbubbles were studied numerically using a finite element method. Mode characteristics, such as quality factor (Q) and effective refractive index, were determined for different bubble diameters and shell thicknesses. For sensing applications with whispering gallery modes (WGMs), thinner shells yield improved sensitivity. However, the Q-factor decreases with reduced thickness and this limits the final resolution. Three types of sensing applications with microbubbles, based on their optimized geometrical parameters, were studied. Herein the so-called quasi-droplet regime is defined and discussed. It is shown that best resolution can be achieved when microbubbles act as quasi-droplets, even for water-filled cavities at the telecommunications C-band.

© 2014 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(140.3948) Lasers and laser optics : Microcavity devices
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Sensors

History
Original Manuscript: February 3, 2014
Revised Manuscript: March 7, 2014
Manuscript Accepted: March 7, 2014
Published: March 17, 2014

Citation
Yong Yang, Jonathan Ward, and Síle Nic Chormaic, "Quasi-droplet microbubbles for high resolution sensing applications," Opt. Express 22, 6881-6898 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-6-6881


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