119 citations · 402 across the 7 of their papers we have counts for
7 papers
Probing the screening of the Casimir interaction with optical tweezers
L. B. Pires, D. S. Ether, B. Spreng +13
We measure the colloidal interaction between two silica microspheres in aqueous solution in the distance range from m to m with the help of optical tweezers. When e…
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…
Probing the Casimir force with optical tweezers
D. S. Ether, L. B. Pires, S. Umrath +10
We propose to use optical tweezers to probe the Casimir interaction between microspheres inside a liquid medium for geometric aspect ratios far beyond the validity of the widely em…
Optical tweezers absolute calibration
R S Dutra, N B Viana, P A Maia Neto +1
Optical tweezers are highly versatile laser traps for neutral microparticles, with fundamental applications in physics and in single molecule cell biology. Force measurements are p…
Angular momentum of focused beams: beyond the paraxial approximation
Paula B. Monteiro, Paulo A. Maia Neto, H. Moyses Nussenzveig
We investigate in detail the focusing of a circularly polarized Laguerre-Gaussian laser beam ( orbital angular momentum per photon; for left/right-handed polar…
Towards absolute calibration of optical tweezers
N. B. Viana, M. S. Rocha, O. N. Mesquita +3
Aiming at absolute force calibration of optical tweezers, following a critical review of proposed theoretical models, we present and test the results of MDSA (Mie-Debye-Spherical A…
Theory of Optical Tweezers
P. A. Maia Neto, H. M. Nussenzveig
We derive a partial-wave (Mie) expansion of the axial force exerted on a transparent sphere by a laser beam focused through a high numerical aperture objective. The results hold th…