Émilie Absil

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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(More)
In phase-shifting interferometry experiments, the accuracy of the phase shift is a major issue. Many experimental and data analyses are done to cancel phase-shift errors inherent to the modulation techniques used. We propose to remove most of the phase-shift error by recourse to a frequency-shifting method. This approach can be applied to both holography(More)
We report experimental results on heterodyne holographic microscopy of subwavelength-size gold particles. The apparatus uses continuous green-laser illumination of the metal beads in a total internal reflection configuration for dark-field operation. Detection of the scattered light at the illumination wavelength on a charge-coupled-device array detector(More)
We have compared the respective efficiencies of off-axis and phase-shifting holography in terms of noise and aliases removal. The comparison is made by analyzing holograms of a USAF target backlit with laser illumination, recorded with a charge-coupled device camera. We show that it is essential to remove the local oscillator beam noise, especially at low(More)
Michael Atlan, Michel Gross, Pierre Desbiolles, Émilie Absil, Gilles Tessier, and Mäıté Coppey-Moisan Laboratoire Kastler-Brossel de l’École Normale Supérieure, CNRS UMR 8552, Université Pierre et Marie Curie Paris 6, 24 rue Lhomond 75231 Paris cedex 05. France École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris, CNRS UPR 5,(More)
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