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.