Simulation and optimization of polymer-coated microsphere resonators in chemical vapor sensing

Nai Lin, Lan Jiang, Sumei Wang, Qianghua Chen, Hai Xiao, Yongfeng Lu, Hailung Tsai

Research output: Contribution to journalArticle

19 Scopus citations


This study presents a chemical vapor sensor based on polymer-coated microsphere resonators. A theoretical simulation of the sensor response is performed, and optimization of the polymer layer thickness is investigated. Results show that the sensor exhibits a good linearity and a low detection limit of the refractive index change. Especially at the thermostable thickness of the polymer layer, the refractive index detection limit of the wavelength around 780nm can be as low as ∼2 × 10-8 refractive index unit for a spectral resolution of 10 fm, without any temperature control. Because of the good sensing performance and simple manipulation, the proposed sensor is a very promising platform for chemical vapor detections.

Original languageEnglish (US)
Pages (from-to)5465-5472
Number of pages8
JournalApplied optics
Issue number28
Publication statusPublished - Oct 1 2011


ASJC Scopus subject areas

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

Cite this