Nanoscale Control over Optical Dislocations
Optics
2017-06-05 v1
Abstract
High-order optical vortices are inherently unstable, as they tend to split up under perturbation to a series of vortices with unity charge. Control over the perturbation opens up a new degree of freedom to control and tune their location in a 2D-space, with immediate implications on trapping, light-matter interactions and super-resolution imaging. Here, we present a continuous nano-scale tuning of the spatial location of plasmonic vortices on metal-air interface achieved by varying the polarization state of the light coupled to the surface plasmons through a spiral slit. We demonstrate such a control at nano-scale resolution using phase-resolved near-field microscopy.
Cite
@article{arxiv.1706.00577,
title = {Nanoscale Control over Optical Dislocations},
author = {Evgeny Ostrovsky and Kobi Cohen and Bergin Gjonaj and Guy Bartal},
journal= {arXiv preprint arXiv:1706.00577},
year = {2017}
}