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physics.optics2024★ 3 cited
Probing the chirality of a single microsphere trapped by a focused vortex beam through their orbital period
Kainã Diniz, Tanja Schoger, Arthur L. Fonseca +6
When microspheres are illuminated by tightly focused vortex beams, they can be trapped in a non-equilibrium steady state where they orbit around the optical axis. By using the Mie-…
physics.optics2023★ 4 cited
Precise in situ radius measurement of individual optically trapped microspheres using negative optical torque exerted by focused vortex beams
Kainã Diniz, Tanja Schoger, Guilherme T. Moura +6
We demonstrate a new method for determining the radius of micron-sized particles trapped by a vortex laser beam. The technique is based on measuring the rotation experienced by the…