38 citations · 61 across the 4 of their papers we have counts for
6 papers · 1 filter
Enantioselection and chiral sorting of single microspheres using optical pulling forces
R. Ali, R. S. Dutra, F. A. Pinheiro +1
We put forward a novel, twofold scheme that enables at the same time all-optical enantioselection and sorting of single multipolar chiral microspheres based on optical pulling forc…
Theory of optical tweezing of dielectric microspheres in chiral host media and its applications
Rfaqat Ali, R. S. Dutra, F. A. Pinheiro +2
We report for the first time the theory of optical tweezers of spherical dielectric particles embedded in a chiral medium. We develop a partial-wave (Mie) expansion to calculate th…
Tailoring optical pulling forces with composite microspheres
R. Ali, F. A. Pinheiro, R. S. Dutra +1
Optical pulling forces or tractor beams can pull particles against light propagation by redirecting the incident photons forward. This is typically achieved using Bessel beams with…
Enantioselective manipulation of chiral nanoparticles using optical tweezers
R. Ali, F. A. Pinheiro, F. S. S. Rosa +2
We put forward an enantioselective method for chiral nanoparticles using optical tweezers. We demonstrate that the optical trapping force in a typical, realistic optical tweezing s…
Negative optical torque on a microsphere in optical tweezers
K. Diniz, R. S. Dutra, L. B. Pires +3
We show that the optical force field in optical tweezers with elliptically polarized beams has the opposite handedness for a wide range of particle sizes and for the most common co…
Optimizing optical tweezing with directional scattering in composite microspheres
R. Ali, F. A. Pinheiro, F. S. S. Rosa +2
Trapping of microspheres with a single focused laser beam is usually limited to materials with relative refractive indexes slightly larger than one. We show that directional light…