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Proceedings Paper

Optofluidic device for sorting microparticles using optical whispering gallery mode resonances
Author(s): Alexander S. King; Nathan J. Jordan; Yuhe Chang; Kamil Ekinci; Sean B. Andersson; Oleksiy Svitelskiy
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Paper Abstract

We describe the use of resonant amplification of light propelling forces for selective separation of fluid-suspended dielectric microparticles. The force amplification and the selectivity of the method is achieved using the whispering gallery mode resonances of the microparticles. The selectivity is determined by the inverse of the quality factor (Q) of the resonances in liquid (with Q ~ 104-106). We demonstrate that the evanescent field around a tapered optical fiber fed with ~20 mW power from a 1064 nm laser can selectively move polystyrene microspheres of up to 20 μm in diameter through distances of more than 50 μm, thereby establishing that the technique is sufficient for efficient separation.

Paper Details

Date Published: 25 February 2020
PDF: 8 pages
Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 112831W (25 February 2020); doi: 10.1117/12.2543552
Show Author Affiliations
Alexander S. King, Gordon College (United States)
Nathan J. Jordan, Gordon College (United States)
Yuhe Chang, Boston Univ. (United States)
Kamil Ekinci, Boston Univ. (United States)
Sean B. Andersson, Boston Univ. (United States)
Oleksiy Svitelskiy, Gordon College (United States)

Published in SPIE Proceedings Vol. 11283:
Integrated Optics: Devices, Materials, and Technologies XXIV
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

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