
Open access
Date
2015-12Type
- Journal Article
Citations
Cited 49 times in
Web of Science
Cited 56 times in
Scopus
ETH Bibliography
no
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Abstract
Optical trapping is an indispensable tool in physics and the life sciences. However, there is a clear trade off between the size of a particle to be trapped, its spatial confinement, and the intensities required. This is due to the decrease in optical response of smaller particles and the diffraction limit that governs the spatial variation of optical fields. It is thus highly desirable to find techniques that surpass these bounds. Recently, a number of experiments using nanophotonic cavities have observed a qualitatively different trapping mechanism described as `self-induced back-action trapping' (SIBA). In these systems, the particle motion couples to the resonance frequency of the cavity, which results in a strong interplay between the intra-cavity field intensity and the forces exerted. Here, we provide a theoretical description that for the first time captures the remarkable range of consequences. In particular, we show that SIBA can be exploited to yield dynamic reshaping of trap potentials, strongly subwavelength trap features, and significant reduction of intensities seen by the particle, which should have important implications for future trapping technologies. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000425501Publication status
publishedExternal links
Journal / series
New Journal of PhysicsVolume
Pages / Article No.
Publisher
Institute of PhysicsSubject
Optical trapping; Back-action; Nano-photonicOrganisational unit
09698 - Quidant, Romain / Quidant, Romain
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Show all metadata
Citations
Cited 49 times in
Web of Science
Cited 56 times in
Scopus
ETH Bibliography
no
Altmetrics