Ultrasensitive Chemical Sensors Based on Whispering Gallery Modes in a Microsphere Coated with Zeolite
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.
Recommended Citation
N. Lin et al., "Ultrasensitive Chemical Sensors Based on Whispering Gallery Modes in a Microsphere Coated with Zeolite," Applied Optics, Optical Society of America, Jan 2010.
The definitive version is available at https://doi.org/10.1364/AO.49.006463
Department(s)
Mechanical and Aerospace Engineering
Second Department
Electrical and Computer Engineering
International Standard Serial Number (ISSN)
1559-128X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2010 Optical Society of America, All rights reserved.
Publication Date
01 Jan 2010
