10.1021/nl4005892.s003
Yoshito Tanaka
Yoshito
Tanaka
Shogo Kaneda
Shogo
Kaneda
Keiji Sasaki
Keiji
Sasaki
Nanostructured Potential of Optical Trapping Using
a Plasmonic Nanoblock Pair
American Chemical Society
2013
Plasmonic Nanoblock PairWe
incident polarization
Optical Trapping
pair axis
trap stiffness
nanoblock pair
diffraction limit
3 orders
potential
100 nm dielectric particle
2013-05-08 00:00:00
Dataset
https://acs.figshare.com/articles/dataset/Nanostructured_Potential_of_Optical_Trapping_Using_a_Plasmonic_Nanoblock_Pair/2417137
We
performed two-dimensional mapping of optical trapping potentials experienced
by a 100 nm dielectric particle above a plasmon-resonant gold nanoblock
pair with a gap of several nanometers. Our results demonstrate that
the potentials have nanoscale spatial structures that reflect the
near-field landscape of the nanoblock pair. When an incident polarization
parallel to the pair axis is rotated by 90°, a single potential
well turns into multiple potential wells separated by a distance smaller
than the diffraction limit; this is associated with super-resolution
optical trapping. In addition, we show that the trap stiffness can
be enhanced by approximately 3 orders of magnitude compared to that
with conventional far-field trapping.