Controlled assembly of organic whispering-gallery-mode microlasers as highly sensitive chemical vapor sensors. Issue 21 (28th February 2017)

• Record Type: Journal Article
• Authors: Gao, Miaomiao; Wei, Cong; Lin, Xianqing; Liu, Yuan; Hu, Fengqin; Zhao, Yong Sheng
• Is Part Of: Chemical communications. Volume 53:Issue 21(2017)
• Page Start: 3102
• Page End: 3105
• Publication Date: 2017-02-28
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc08094d
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Organic whispering-gallery-mode lasers, assembled from π-conjugated polymers, can be used for highly sensitive detection of trace amounts of chemical gases by monitoring the shift of the lasing mode, paving a new way to design novel photonic sensing devices. Abstract : We demonstrate the fabrication of organic high Q active whispering-gallery-mode (WGM) resonators from π-conjugated polymer by a controlled emulsion-solvent-evaporation method, which can simultaneously provide optical gain and act as an effective resonant cavity. By measuring the shift of their lasing modes on exposure to organic vapor, we successfully monitored the slight concentration variation in the chemical gas. These microlaser sensors demonstrated high detection sensitivity and good signal repeatability under continuous chemical gas treatments. The results offer an effective strategy to design miniaturized optical sensors.