Related Experiment Video
Updated: Apr 26, 2026
Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis
Published on: March 7, 2018
Ultrasensitive diagnostic analysis of Au nanoparticles optically trapped in silicon photonic circuits at
S Hamed Mirsadeghi1, Jeff F Young
1Department of Physics and Astronomy, Advanced Materials and Process Engineering Laboratory, University of British Columbia , Vancouver, British Columbia V6T 1Z4, Canada.
Abstract:
Silicon microcavity-based optical trapping of Au nanoparticles with diameters as small as ≈24 nm is achieved using optical powers <1 mW. By comparing measured and modeled histograms of transmission time series data obtained when a particle is trapped in the cavity, it is shown that the influence of backaction on the transmitted light dynamics alone can be used to determine the size of trapped particles with nanometer precision.
