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Part-per-trillion trace gas detection using frequency-locked whispering gallery mode microtoroids

Li, Cheng and Lohrey, Trevor and Nguyen, Phuong-Diem and Min, Zhouyang and Stoltz, Brian and Su, Judith (2021) Part-per-trillion trace gas detection using frequency-locked whispering gallery mode microtoroids. In: Integrated Optics: Devices, Materials, and Technologies XXV. Proceedings of SPIE. No.11689. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 116890B. ISBN 9781510642133. https://resolver.caltech.edu/CaltechAUTHORS:20220421-197072600

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Abstract

We use a system known as FLOWER (frequency locked optical whispering evanescent resonator) to rapidly detect trace amounts of the chemical warfare agent surrogates DIMP and DMMP. We use sorbent polymer layers covalently bound to the surface of the microtoroid cavity to selectively adsorb target gases. As the target gas diffuses into the polymer layer, a measurable change in the resonance frequency of the toroid occurs. We demonstrate 80 ppt (part per trillion) sensing of DIMP; two orders of magnitude better than what can be achieved using mass spectroscopy.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2578032DOIConference Presentation
https://resolver.caltech.edu/CaltechAUTHORS:20220427-196780100Related ItemDiscussion Paper
ORCID:
AuthorORCID
Lohrey, Trevor0000-0003-3568-7861
Stoltz, Brian0000-0001-9837-1528
Additional Information:© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:11689
DOI:10.1117/12.2578032
Record Number:CaltechAUTHORS:20220421-197072600
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20220421-197072600
Official Citation:Cheng Li, Trevor Lohrey, Phuong-Diem Nguyen, Zhouyang Min, Brian Stoltz, and Judith Su "Part-per-trillion trace gas detection using frequency-locked whispering gallery mode microtoroids", Proc. SPIE 11689, Integrated Optics: Devices, Materials, and Technologies XXV, 116890B (5 March 2021); https://doi.org/10.1117/12.2578032
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114408
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Apr 2022 21:24
Last Modified:27 Apr 2022 14:45

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