Opto-thermoelectric pulling of light-absorbing particles.

ABSTRACT: Optomechanics arises from the photon momentum and its exchange with low-dimensional objects. It is well known that optical radiation exerts pressure on objects, pushing them along the light path. However, optical pulling of an object against the light path is still a counter-intuitive phenomenon. Herein, we present a general concept of optical pulling-opto-thermoelectric pulling (OTEP)-where the optical heating of a light-absorbing particle using a simple plane wave can pull the particle itself against the light path. This irradiation orientation-directed pulling force imparts self-restoring behaviour to the particles, and three-dimensional (3D) trapping of single particles is achieved at an extremely low optical intensity of 10^-2 mW μm^-2. Moreover, the OTEP force can

SUBMITTER: Lin L 

PROVIDER: S-EPMC7058623 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature