Detection of chemical species using ultraviolet microdisk lasers

W. Fang*, D. B. Buchholz, R. C. Bailey, J. T. Hupp, R. P.H. Chang, H. Cao

*Corresponding author for this work

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

We have utilized hybrid zinc oxide/silica microdisk lasers to sense volatile organic compounds, such as toluene and nitrobenzene. Nonspecific adsorption of these organic molecules onto the microdisk surface causes an increase in the disk refractive index, ultimately resulting in a redshift of the observed lasing wavelengths. The monitoring of these shifts provides the sensing modality. Microdisk lasers were found to respond rapidly and reversibly to the investigated chemicals demonstrating, in principal, the chemical and biological sensing capabilities of such devices.

Original languageEnglish (US)
Pages (from-to)3666-3668
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number17
DOIs
StatePublished - Oct 25 2004

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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