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Self-induced transparency in colloidal liquids by -scan-based optical trapping
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic description of the principle for the creation of a close-packed array by utilizing a -scan-based optical trapping. The change in the particle concentration within the beam waist at three places (before, after, and at the focus point) is shown.

Image of FIG. 2.
FIG. 2.

Evolution of the transmission behavior of the sample cell with increasing trapping power in the -scan trapping experiments. (a) , (b) , and (c) . For each trapping power, the first five consecutive scans (separated by dotted lines) are presented. For each curve, the central position where a valley (or a peak) appears corresponds to the focus point of the scanning process.

Image of FIG. 3.
FIG. 3.

Evolution of the transmitted light recorded by a CCD in the -scan trapping process performed at a trapping power of . The images were taken at different sample positions where the sample cell was [(a)–(c)] before and far from the focus point, [(d) and (e)] before and close to the focus point, (f) at the focus point, (g) just after the focus point, and [(h)–(l)] after and far from the focus point.

Image of FIG. 4.
FIG. 4.

Evolution of the diffraction pattern of the trapping region in the first half-scan at a trapping power of . The photographs were taken at different sample positions corresponding to those shown in Figs. 3(a)–3(f).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Self-induced transparency in colloidal liquids by Z-scan-based optical trapping