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Dielectrophoretically tuneable optical waveguides using nanoparticles in microfluidics
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View: Figures


Image of FIG. 1.
FIG. 1.

DEP curved design: (a), (b), and (c) electrode array, curved electrodes, and dimensions of one pair, (d) schematic of the measurement set-up.

Image of FIG. 2.
FIG. 2.

Variations in the DEP forces at different locations of the microchannel.

Image of FIG. 3.
FIG. 3.

DEP manipulation of silica nanoparticles at constant flow rate of and ac potential of 15 V. Frequencies of (a) 250 kHz, (b) 5 MHz for 450 nm, (c) 250 kHz, and (d) 5 MHz for 230 nm particles.

Image of FIG. 4.
FIG. 4.

Output profile observed for 230 nm silica nanoparticles at (a) 0 V, (b) 10 V, (c) 15 V, and for 450 nm particles at (d) 0 V (e) 10 V, and (f) 15 V. The right corner deviation from the scattering and waveguiding effect is due to the deviation caused by the narrowband flowing toward the output reservoir.

Image of FIG. 5.
FIG. 5.

(a) Ratio of core to cladding intensity as a function of the applied voltage for the two intersections shown in the inset. (b) The variations in scattering efficiency vs diameter of silica particles.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dielectrophoretically tuneable optical waveguides using nanoparticles in microfluidics