Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4804243
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Funding
- Australian Research Council [DP0987146]
- Australian Research Council [DP0987146] Funding Source: Australian Research Council
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We detect 39 nm x 10 nm gold nanorods using a microtoroid stabilized via the Pound-Drever-Hall method. Real-time detection is achieved with signal-to-noise ratios up to 12.2. These nanoparticles are a factor of three smaller in volume than any other nanoparticle detected using whispering gallery mode sensing to date. We show through repeated experiments that the measurements are reliable and verify the presence of single nanorods on the microtoroid surface using electron microscopy. At our current noise level, the plasmonic enhancement of these nanorods could enable detection of proteins with radii as small as a = 2 nm. (C) 2013 AIP Publishing LLC.
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