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Article Dans Une Revue Opt Express Année : 2010

Photothermal heterodyne holography of gold nanoparticles.

Résumé

We report a method based on heterodyne numerical holography associated to photothermal excitation for full field and three-dimensional localisation of metallic nanoparticles. A modulated pump laser (lambda = 532 nm) heats several particles, creating local refractive index changes. This modulation is detected using a probe and a local oscillator beam (lambda = 785 nm), frequency-shifted to create a hologram beating at low frequency. Tens of particles, down to diameters of 10 nm, can be localised simultaneously and selectively in three dimensions with near- diffraction resolution by a numerical reconstruction of a single hologram acquired in 5 s.
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Dates et versions

hal-00477176 , version 1 (28-04-2010)

Identifiants

  • HAL Id : hal-00477176 , version 1
  • PUBMED : 20173900

Citer

E. Absil, G. Tessier, M. Gross, Michael Atlan, N. Warnasooriya, et al.. Photothermal heterodyne holography of gold nanoparticles.. Opt Express, 2010, 18 (2), pp.780-6. ⟨hal-00477176⟩
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