.png){kind=icon}
Return
Optical pulling force
.png){kind=icon}
PRE
AI
DOI：10.1038/NPHOTON.2011.153.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
A photon carries (h) over bark of momentum, so it may be anticipated that light will 'push' on any object standing in its path by means of the scattering force(1-3). In the absence of an intensity gradient, using a light beam to pull a particle backwards is counter-intuitive. Here, we show that it is possible to realize a backward scattering force that pulls a particle all the way towards the source without an equilibrium point. The underlining physics is the maximization of forward scattering via interference of the radiation multipoles. We show explicitly that the necessary condition to realize a negative (pulling) optical force is the simultaneous excitation of multipoles in the particle, and if the projection of the total photon momentum along the propagation direction is small, an attractive optical force is possible. This possibility adds 'pulling' as an additional degree of freedom to optical micromanipulation.
Keywords:
SCATTERING
MICROMANIPULATION
DIFFRACTION
BEAM
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
32.9
Papers:
4.3K
Citations:
6.1W
Organization
Cited Papers
.png){kind=icon}
ShareSaveShareSaveShareSaveShareSaveShareSaveShareSave
View more