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Observation of a single-beam gradient force optical trap for dielectric particles (1986)
| Venue: | Opt.Lett |
| Citations: | 253 - 0 self |
BibTeX
@ARTICLE{Ashkin86observationof,
author = {A. Ashkin and J. M. Dziedzic and J. E. Bjorkholm and Steven Chu},
title = {Observation of a single-beam gradient force optical trap for dielectric particles},
journal = {Opt.Lett},
year = {1986},
pages = {288--290}
}
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Abstract
Optical trapping of dielectric particles by a single-beam gradient force trap was demonstrated for the first reported time. This confirms the concept of negative light pressure due to the gradient force. Trapping was observed over the entire range of particle size from 10 um to-25 nm in water. Use of the new trap extends the size range of macroscopic particles accessible to optical trapping and manipulation well into the Rayleigh size regime. Application of this trapping principle to atom trapping is considered. We report the first experimental observation to our knowledge of a single-beam gradient force radiationpressure particle trap. ' With such traps dielectric particles in the size range from 10 Am down to-25 nm were stably trapped in water solution. These results confirm the principles of the single-beam gradient force trap and in essence demonstrate the existence of negative radiation pressure, or a backward force component, that is due to an axial intensity gradient. They also open a new size regime to optical trapping
Keyphrases
dielectric particle single-beam gradient force optical trap optical trapping size range single-beam gradient force trap trap dielectric particle axial intensity gradient um to-25 nm to-25 nm gradient force entire range negative light pressure negative radiation pressure backward force component new size regime new trap particle size rayleigh size regime water solution first experimental observation macroscopic particle
