Supplementary information
From the following article:
Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides
Allen H. J. Yang, Sean D. Moore, Bradley S. Schmidt, Matthew Klug, Michal Lipson & David Erickson
Nature 457, 71-75(1 January 2009)
doi:10.1038/nature07593
Supplementary Information
This file contains Supplementary Data and Supplementary References
Supplementary Movie 1
Stable nanoparticle trapping and controlled release by the slot waveguide. This movie demonstrates the high stability, long term trapping of many 75nm polystyrene particles by and optically excited 100nm slot waveguide. In this case, the slot waveguide is excited and particles flowing over it are allowed to accumulate for some time. In the first half of the movie the particles are released by removing the excitation power and in the second half they are released by switching polarity. This capture and release is also shown in Figure 2.
Supplementary Movie 2
Nanoparticle capture by the slot waveguide. This movie demonstrates the capture and trapping of two individual 100nm polystyrene particles by an optically excited 120nm slot waveguide. In this movie, the particles are initially flowing from left to right by a microfluidic flow. They are trapped near the stability point and the particle is released when the random thermal energy exceeds the work required to break the trap.
Supplementary Movie 3
Optical force transport of a single nanoparticle inside the slot waveguide. In this movie, we demonstrate the optical force transport of a single 100nm particle inside a 120nm slot waveguide. This transport is also shown in Figure 2.
Supplementary Movie 4
Biomolecular trapping inside the slot waveguide. In this movie, we demonstrate optical trapping of Yo-Yo tagged lambda-DNA by the slot waveguide. The DNA is initially flowing from left to right in the microchannel and becomes trapped on a 60nm slot waveguide. The DNA is released at the end of the movie when the optical power is removed. Note that when no optical power is applied, no DNA is trapped indicating that the effect is entirely optical, not hydrodynamic. This trapping is also shown in Figure 3.
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