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Paper detail

Label-free detection of single nanoparticles with disordered nanoisland surface plasmon sensor

We report sensing of single nanoparticles using disordered metallic nanoisland substrates supporting surface plasmon polaritons (SPPs). Speckle patterns arising from leakage radiation of elastically scattered SPPs provides a unique fingerprint of the scattering microstructure at the sensor surface. Experimental measurements of the speckle decorrelation are presented and shown to enable detection of sorption of individual gold nanoparticles and polystyrene beads. Our approach is verified through bright-field and fluorescence imaging of particles adhering to the nanoisland substrate.

preprint2022arXivOpen access
Hongki LeeJoel BerkAaron WebsterDonghyun KimMatthew R Foreman
physics.app-phphysics.optics
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Hongki LeeJoel BerkAaron WebsterDonghyun KimMatthew R Foreman

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