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arXiv · 1706.00577

Nanoscale Control over Optical Dislocations

Evgeny Ostrovsky·Kobi Cohen·Bergin Gjonaj·Guy Bartal
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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.

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Evgeny Ostrovsky, Kobi Cohen, Bergin Gjonaj, Guy Bartal. 2017-06-02. Nanoscale Control over Optical Dislocations. https://arxiv.org/abs/1706.00577

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