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?

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UltrafastPED is offline
Oct19-13, 09:46 AM
P: 1,364
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 online now
Oct19-13, 12:16 PM
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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!

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