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Anomalous vibrational dispersion in holographically trapped colloidal arrays
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Polin, Marco, Grier, David and Quake, Stephen (2006) Anomalous vibrational dispersion in holographically trapped colloidal arrays. Physical Review Letters, Volume 96 (number 8). Article number 088101 . doi:10.1103/PhysRevLett.96.088101 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.96.088101
Abstract
Colloidal spheres localized in an array of harmonic wells form a thermally excited, viscously damped dynamical system capable of supporting propagating elastic waves. Experimentally realized with micrometer-scale polystyrene spheres localized in a line of holographic optical traps, the hydrodynamically coupled array’s behavior is quantitatively explained by a model based on the Oseen superposition approximation. The spheres’ purely dissipative coupling is predicted to mediate a crossover to a regime of underdamped propagating elastic waves with uniformly negative group velocities that has yet to be verified experimentally.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Journal or Publication Title: | Physical Review Letters | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 0031-9007 | ||||||
Official Date: | 1 March 2006 | ||||||
Dates: |
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Volume: | Volume 96 | ||||||
Number: | number 8 | ||||||
Article Number: | Article number 088101 | ||||||
DOI: | 10.1103/PhysRevLett.96.088101 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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