Home > Seminars > Année 2020 > Conférence de Juan José SAENZ ANNULE
Conférence de Juan José SAENZ ANNULE
Ikerbasque Research Professor, DIPC - Donostia International Physics Center
by - 9 March 2020 (modifié le 14 March 2020)
Optical forces on small particles: From optical tweezers to light induced “Mock-Gravity” interactions
Appropriate combinations of laser beams can be used to trap and manipulate small particles with “optical tweezers” as well as to induce significant “optical binding” forces between particles.
Optical forces between small particles are usually strongly anisotropic depending on the interference landscape of the external fields. This is in contrast with the familiar isotropic van der Waals-Casimir-Lifshitz interactions between neutral bodies arising from random electromagnetic waves generated by equilibrium quantum and thermal fluctuations.
We will discuss how non-equilibrium randomly fluctuating light fields can be used to induce and control isotropic, translational invariant, dispersion forces between small colloidal particles. When the light frequency is tuned near an absorption resonance, the interaction forces between particles follow a long-range gravity like inverse square distance law.
HORAIRE INHABITUEL
La conférence sera suivie d’une collation dans le hall de l’ISMO pour poursuivre la discussion de manière informelle.
Conférence de Juan José Saenz - 106.7 KiB 24 mars 2020 |