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We have proposed surface scanning measurement based on the laser trapping based probe with the standing wave scale (SWS). A scale resolution of SWS is subject to the wavelength of laser and of the hundred nm order, so the interpolation of the SWS is required. The microsphere used for probe, which is the sensor to read the SWS, is located where the forces by the laser trapping and by the standing wave...
We demonstrated three-dimensional (3D) position measurements of a gold nanoparticle held in optical tweezers in water. The position measurements were performed with an in-line, low-coherence digital holographic microscope with the twilight-field technique. The position of the optically-trapped nanoparticle with a diameter of 60 nm had an axial variation of 7.6 nm in the standard deviation when a 1070...
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