Journal
OPTICS EXPRESS
Volume 20, Issue 28, Pages 29426-29446Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.029426
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Funding
- National Science Foundation [0954941]
- Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Japan Science and Technology Agency (JST)
- NSF [ECS-0335765]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0954941] Funding Source: National Science Foundation
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We, for the first time, report the detection and the size measurement of single nanoparticles (i.e. polystyrene) in aquatic environment using mode splitting in a whispering gallery mode (WGM) optical resonator, namely a microtoroid resonator. Using this method we achieved detecting and measuring individual synthetic hemozoin nanocrystals-a hemoglobin degradation by-product of malarial parasites-dispersed in a solution or in air. The results of size measurement in solution and in air agree with each other and with those obtained using scanning electron microscope and dynamic light scattering. Moreover, we compare the sensing capabilities of the degenerate (single resonance) and non-degenerate (split mode, doublet) operation regimes of the WGM resonator. (C)2012 Optical Society of America
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