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Actuation of cantilevers by optical trapping
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10.1063/1.2335983
/content/aip/journal/apl/89/7/10.1063/1.2335983
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/7/10.1063/1.2335983

Figures

Image of FIG. 1.
FIG. 1.

Schematic showing the concept of optically trapped cantilevers.

Image of FIG. 2.
FIG. 2.

Schematic layout of cantilever trapping and detection system. A Raman laser operating at is coupled into port 1 of a fiber optic circulator. The beam at the port 2 output of the circulator is collimated, directed to a standard inverted optical tweezer setup and brought to trapping focus by a 0.65 NA objective lens. Light backscattered from the cantilever is coupled confocally back into port 2 of the circulator and is delivered via port 3 to a detector. The dichroic mirror is a high reflector for the laser light, but transmits visible light from the microscope to the charge-coupled device (CCD) camera.

Image of FIG. 3.
FIG. 3.

Silica cantilever trapping efficiency. Solid line: Trapping efficiency of cantilever as a function of transverse displacement of cantilever from the axis of trapping beam. Dashed line: Theoretical trapping efficiency based on geometrical optics model.

Image of FIG. 4.
FIG. 4.

Confocal backscattered signal from cantilever when excited by laser beam chopped at .

Tables

Generic image for table
Table I.

Physical properties of long cantilevers in water with square cross sections. The trapping spring constant is calculated for a trapping beam.

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/content/aip/journal/apl/89/7/10.1063/1.2335983
2006-08-16
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Actuation of cantilevers by optical trapping
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/7/10.1063/1.2335983
10.1063/1.2335983
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