Optical trapping, excitation, and detection of polystyrene beads in a fiber-based silicon V-groove system

Cynthia Jensen McMullin; Edward R. Lyons; Yan Jiang; Henry P. Lee

doi:10.1117/12.427914

4 June 2001 Optical trapping, excitation, and detection of polystyrene beads in a fiber-based silicon V-groove system

Cynthia Jensen McMullin, Edward R. Lyons, Yan Jiang, Henry P. Lee

Proceedings Volume 4253, Optical Fibers and Sensors for Medical Applications; (2001) https://doi.org/10.1117/12.427914
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

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.

Citation Download Citation

Cynthia Jensen McMullin, Edward R. Lyons, Yan Jiang, and Henry P. Lee "Optical trapping, excitation, and detection of polystyrene beads in a fiber-based silicon V-groove system", Proc. SPIE 4253, Optical Fibers and Sensors for Medical Applications, (4 June 2001); https://doi.org/10.1117/12.427914

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