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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 33 — Nov. 20, 2010
  • pp: 6463–6471

Ultrasensitive chemical sensors based on whispering gallery modes in a microsphere coated with zeolite

Nai Lin, Lan Jiang, Sumei Wang, Lei Yuan, Hai Xiao, Yongfeng Lu, and Hailung Tsai  »View Author Affiliations


Applied Optics, Vol. 49, Issue 33, pp. 6463-6471 (2010)
http://dx.doi.org/10.1364/AO.49.006463


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Abstract

We propose a highly sensitive chemical sensor by functionally coating a zeolite film on the external surface of an optical microsphere. Using the perturbation theory, a model is developed to calculate sensor sensitivity and analyze the impact of the zeolite film thickness. The quality factor and detection limit are also investigated by using an approximate model. Simulations show that a zeolite coating can effectively increase sensitivity. The results provide physical insights for the design and optimization of various parameters for desired sensor performance.

© 2010 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(230.5750) Optical devices : Resonators
(140.3948) Lasers and laser optics : Microcavity devices
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 12, 2010
Revised Manuscript: October 6, 2010
Manuscript Accepted: October 15, 2010
Published: November 16, 2010

Citation
Nai Lin, Lan Jiang, Sumei Wang, Lei Yuan, Hai Xiao, Yongfeng Lu, and Hailung Tsai, "Ultrasensitive chemical sensors based on whispering gallery modes in a microsphere coated with zeolite," Appl. Opt. 49, 6463-6471 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-33-6463


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