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, Hailung Tsai

Research output: Contribution to journalArticle

27 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)6463-6471
Number of pages9
JournalApplied optics
Volume49
Issue number33
DOIs
StatePublished - Nov 20 2010

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Whispering gallery modes
whispering gallery modes
Chemical sensors
Microspheres
Coatings
sensors
Sensors
Film thickness
coatings
Q factors
film thickness
perturbation theory
optimization
sensitivity
simulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

Ultrasensitive chemical sensors based on whispering gallery modes in a microsphere coated with zeolite. / Lin, Nai; Jiang, Lan; Wang, Sumei; Yuan, Lei; Xiao, Hai; Lu, Yongfeng; Tsai, Hailung.

In: Applied optics, Vol. 49, No. 33, 20.11.2010, p. 6463-6471.

Research output: Contribution to journalArticle

Lin, Nai ; Jiang, Lan ; Wang, Sumei ; Yuan, Lei ; Xiao, Hai ; Lu, Yongfeng ; Tsai, Hailung. / Ultrasensitive chemical sensors based on whispering gallery modes in a microsphere coated with zeolite. In: Applied optics. 2010 ; Vol. 49, No. 33. pp. 6463-6471.
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