Open AccessStochastic 3D optical mapping by holographic localization of Brownian scatterers
Author(s) -
Ariadna Martinez-Marrades,
Jean-François Rupprecht,
Michel Gross,
Gilles Tessier
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.029191
Subject(s) - holography , optics , optical tweezers , brownian motion , characterization (materials science) , physics , microscopy , quantum mechanics
We present a wide-field microscopy technique for the 3D mapping of optical intensity distributions using Brownian gold nanopar-ticles as local probes, which are localized by off-axis holography. Fast computation methods allow us to localize hundreds of particles per minute with accuracies as good as 3 × 3 × 10nm³ for immobilized particles. Factors limiting this accuracy are discussed and the possibilities of the technique are illustrated through the 3D optical mapping of an evanescent and a propagative wave. Our results pave the way for a new stochastic imaging technique, well adapted to subwavelength optical characterization in water-based systems.