Resonant radiation pressure on neutral particles in a waveguide

Citation
R. Gomez-medina et al., Resonant radiation pressure on neutral particles in a waveguide, PHYS REV L, 86(19), 2001, pp. 4275-4277
Citations number
19
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
19
Year of publication
2001
Pages
4275 - 4277
Database
ISI
SICI code
0031-9007(20010507)86:19<4275:RRPONP>2.0.ZU;2-P
Abstract
A theoretical analysis of electromagnetic forces on neutral particles in a hollow waveguide is presented. We show that the effective scattering cross section of a very small (Rayleigh) particle can be strongly modified inside a waveguide. The coupling or the scattered dipolar field with the waveguid e modes induces a resonant enhanced backscattering state of the scatterer-g uide system close to the onset of new modes. The particle effective cross s ection can then be as large as the wavelength even far from any transition resonance. As we will show, a small particle can be strongly accelerated al ong the guide axis while being highly confined in a narrow zone of the cros s section of the guide.