117 citations · 539 across the 15 of their papers we have counts for
4 papers · 1 filter
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…
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…
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…