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Seeing through chaos in multimode fibres
In a similar fashion to diffusers or other highly scattering media, multimode fibres deliver coherent light signals in the form of apparently random speckled patterns. In contrast to other optically random...
PublicationsSub-micron particle organization by self-imaging of non-diffracting beams
We present the first theoretical and experimental study of dielectric sub- micron particle behaviour in an optical field generated by interference of co- propagating non- diffracting beams of different...
PublicationsSurface delivery of a single nanoparticle under moving evanescent standing-wave illumination
We study the delivery of a submicrometre-sized spherical dielectric particle suspended in water and confined in an evanescent field in the proximity of a glass-water interface. When illuminated by a single...
PublicationsFormation of long and thin polymer fiber using nondiffracting beam
We present a unique method that utilizes high intensity core of the zero-order nondiffracting beam (NDB) to fabricate a homogeneous polymer fiber as narrow as 2 mu m and as long as centimeters. The constant...
PublicationsOptical tracking of spherical micro-objects in spatially periodic interference fields
We present a new method that provides precise detection of micro-object position with respect to a spatially periodic illumination field. Altering the mutual position of the object and the illumination...
PublicationsFibre based cellular transfection
Optically assisted transfection is emerging as a powerful and versatile method for the delivery of foreign therapeutic agents to cells at will. In particular the use of ultrashort pulse lasers has proved...
PublicationsGeneration of multiple Bessel beams for a biophotonics workstation
We present a simple method using an axicon and spatial light modulator to create multiple parallel Bessel beams and precisely control their individual positions in three dimensions. This technique is tested...
PublicationsHigh quality quasi-Bessel beam generated by round-tip axicon
We study theoretically and experimentally the spatial intensity distribution of the zero-order Bessel beam formed by the axicon which possess a rounded tip. Such a tip generates a refracted beam that interferes...
PublicationsOptical micromanipulation using supercontinuum Laguerre-Gaussian and Gaussian beams
We characterize a single beam supercontinuum "white light" trap and determine the trap stiffness in the transverse trapping plane. We realize a holographic white light trapping system using a spatial light...
PublicationsTunable Bessel light modes: engineering the axial propagation
Due to their immunity to diffraction, Bessel light modes potentially offer advantages in various applications. However, they do exhibit significant intensity variations along their axial propagation length...
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