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Optical forces in lossless arbitrary refractive index optical trapping and micromanipulation.
- Source :
- Metamaterials; Nov2012, Vol. 6 Issue 1/2, p51-63, 13p
- Publication Year :
- 2012
-
Abstract
- Abstract: This paper shows, using both a ray optics approach and in the framework of the generalized Lorenz–Mie theory (GLMT), what happens to the optical forces exerted on a lossless spherical particle with an arbitrary (positive or negative) relative refractive index, allowing the external medium also to be metamaterial. It is shown that the anti-parallelism between the linear momentum p of each photon and the Poynting vector S associated with the propagating wave, observed in negative refractive index media, leads to shifts in the direction of the optical force of a single ray and, consequently, to the total optical force exerted by an arbitrary-shaped laser beam. This extends the possible realizable traps and reveals how arbitrary-shaped laser beams can be used to trap particles with arbitrary refractive indices. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 18731988
- Volume :
- 6
- Issue :
- 1/2
- Database :
- Supplemental Index
- Journal :
- Metamaterials
- Publication Type :
- Academic Journal
- Accession number :
- 83450941
- Full Text :
- https://doi.org/10.1016/j.metmat.2012.09.001