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Proceedings Paper

Optical trapping, excitation, and detection of polystyrene beads in a fiber-based silicon V-groove system
Author(s): Cynthia Jensen McMullin; Edward R. Lyons; Yan Jiang; Henry P. Lee
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Paper Abstract

A four-fiber optical trapping/detection system build on silicon, utilizing the natural alignment of anisotropically etched Si V-grooves for positioning of the optical fibers, has been demonstrated. Two, pigtailed laser diodes emitting at 830 nm are connected to cleaved, single-mode, counter- propagating fibers, which are used for trapping polystyrene beads. Orthogonal to the trapping fibers are two additional fibers: one fiber is connected to a laser diode emitting at 660 nm (excitation source) and the opposing detection fiber is connected to a spectrometer. Changes in the relative intensity of the trapping light and the excitation light are used to indicate the capture and position of a bead in the trap. The spectrometer may be interfaced with a computer allowing for complete automation for position, size and fluorescence detection of the trap with an eventual goal of integration with MEMS (Micro ElectroMechanical Systems) and lab on a chip (LOC) technology.

Paper Details

Date Published: 4 June 2001
PDF: 7 pages
Proc. SPIE 4253, Optical Fibers and Sensors for Medical Applications, (4 June 2001); doi: 10.1117/12.427914
Show Author Affiliations
Cynthia Jensen McMullin, Univ. of California/Irvine (United States)
Edward R. Lyons, Univ. of California/Irvine (United States)
Yan Jiang, Univ. of California/Irvine (United States)
Henry P. Lee, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 4253:
Optical Fibers and Sensors for Medical Applications
Israel Gannot, Editor(s)

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