We demonstrate detection and sizing of single nanoparticles down to 30 nm by monitoring the mode splitting induced by a nanoparticle in an ultra-high quality factor (UHQ) microtoroid. Theory and methods are discussed.
© 2010 The Optical Society
(140.0140) Lasers and laser optics : Lasers and laser optics
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(140.3945) Lasers and laser optics : Microcavities
(280.4788) Remote sensing and sensors : Optical sensing and sensors
J. Zhu, S. K. Ozdemir, Y. Xiao, L. Li, L. He, D. Chen, and L. Yang, "Detection and Sizing of Single Nanoparticles by Mode Splitting in an Optical Microresonator," in Conference on Lasers and Electro-Optics 2010, OSA Technical Digest (CD) (Optical Society of America, 2010), paper CTuL4.
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