Interferometric detection of mode splitting for whispering gallery mode biosensors

Knittel, Joachim, McRae, Terry G., Lee, Kwan H. and Bowen, Warwick P. (2010) Interferometric detection of mode splitting for whispering gallery mode biosensors. Applied Physics Letters, 97 12: 123704 - 1-123704 - 3. doi:10.1063/1.3494530

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Author Knittel, Joachim
McRae, Terry G.
Lee, Kwan H.
Bowen, Warwick P.
Title Interferometric detection of mode splitting for whispering gallery mode biosensors
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2010-09
Sub-type Article (original research)
DOI 10.1063/1.3494530
Open Access Status File (Publisher version)
Volume 97
Issue 12
Start page 123704 - 1
End page 123704 - 3
Total pages 3
Place of publication College Park, MD, United States
Publisher American Institute of Physics
Collection year 2011
Language eng
Abstract Sensors based on whispering gallery mode resonators can detect single nanoparticles and even single molecules. Particles attaching to the resonator induce a doublet in the transmission spectrum which provides a self-referenced detection signal. However, in practice this spectral feature is often obscured by the width of the resonance line which hides the doublet structure. This happens particularly in liquid environments that reduce the effective Q factor of the resonator. In this paper we demonstrate an interferometric setup that allows the direct detection of the hidden doublet and thus provides a pathway for developing practical sensor applications. © 2010 American Institute of Physics.
Keyword Biosensors
Signal detection
Whispering gallery modes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article number 123704, pp. 1-3

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2011 Collection
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Citation counts: TR Web of Science Citation Count  Cited 28 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 41 times in Scopus Article | Citations
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Created: Sun, 02 Jan 2011, 00:22:41 EST