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Article Dans Une Revue Optics Letters Année : 2023

Detection of individual metallic nanoparticles via plasmon-mediated optomechanical coupling

Résumé

Characterization of individual nanoparticles is a challenge due to the diffraction limit. To overcome this constraint we investigate the transfer of their optical properties to a mechanical degree of freedom of a larger object. From finite-difference time-domain computations, we estimate the mechanical frequency shift caused by metallic nanoparticles traveling through a microfluidic channel. Due to plasmonic effects we find relative shifts on the order of 1% for a 1 mW incident optical power for particles with radius ranging from 25 to 150 nm. The extreme sensitivity of this detection scheme enables real-time and in situ observation of optical dynamics at nanoscale.
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Dates et versions

hal-04443031 , version 1 (07-02-2024)

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Thomas Antoni, Kevin Makles, Clément Chardin, Pierre Verlot. Detection of individual metallic nanoparticles via plasmon-mediated optomechanical coupling. Optics Letters, 2023, 48 (23), pp.6140. ⟨10.1364/OL.502011⟩. ⟨hal-04443031⟩
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