description of optical tweezers: Ponderomotive force?

by pjbeierle
Tags: description, force, optical, ponderomotive, tweezers
pjbeierle is offline
Oct18-13, 05:01 PM
P: 6
It is mentioned that in optical tweezers the dielectric particles are attracted to the gradient of the laser's electric field.
Is this mechanism the same as the ponderomotive force?
If so, why is this connection not made directly?

Phys.Org News Partner Physics news on
Researchers develop scalable methods for manufacturing metamaterials
Researchers find tin selenide shows promise for efficiently converting waste heat into electrical energy
After 13 years, progress in pitch-drop experiment (w/ video)
UltrafastPED is offline
Oct19-13, 09:46 AM
P: 1,310
Ponderomotive force:

Optical tweezers:

So ponderomotive force is due to the oscillating electric fields, while optical tweezers depend upon the average electric field gradient. These are different physical processes.
Astronuc is offline
Oct19-13, 12:16 PM
Astronuc's Avatar
P: 21,634
Under certain conditions, ponderomotive force plays a role.

Trapping in the Rayleigh Regime (Origin of Pondermotive Force)

pjbeierle is offline
Oct19-13, 12:31 PM
P: 6

description of optical tweezers: Ponderomotive force?

Ah, i see. Thanks!

Register to reply

Related Discussions
Linear Optical Tweezers Atomic, Solid State, Comp. Physics 0
Optical tweezers question Atomic, Solid State, Comp. Physics 40
Optical tweezers General Physics 5
Optical Tweezers Academic Guidance 1
Optical Tweezers Help Wanted: General Physics 0