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Laser fabrication of plasmonic nanostructures with controllable chirality by spiral-shape and vortex beams
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Paper Abstract

Recently, chiral mass transfer on the surface of plasmonic-active metals appeared upon their ablation with vortex laser pulses was found to be driven by a helical-shape temperature and corresponding surface tension gradients rather than optical angular momentum transfer from the incident beam. Here, we demonstrate that using of perfect optical vortices with different topological charges for direct single-pulse laser ablation of noble-metal films don't allow to change the helicity of produced nanoneedles (also called nanojets). Meanwhile, the chirality of laser-induced nanojets can be tuned in a wide range of parameter by properly designing and tailoring the spiral-shape intensity patterns. Such optimization of the laser intensity profile governing the helical movement of the transiently molten metal allows to produce nanostructures with controlled chirality suited for various nanophotonics and biosensing applications.

Paper Details

Date Published: 4 March 2019
PDF: 9 pages
Proc. SPIE 10907, Synthesis and Photonics of Nanoscale Materials XVI, 109070R (4 March 2019); doi: 10.1117/12.2507382
Show Author Affiliations
Sergey A. Syubaev, Institute for Automation and Control Processes (Russian Federation)
Far Eastern Federal Univ. (Russian Federation)
Aleksandr A. Kuchmizhak, Institute for Automation and Control Processes (Russian Federation)
Far Eastern Federal Univ. (Russian Federation)
Aleksey P. Porfirev, Samara Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 10907:
Synthesis and Photonics of Nanoscale Materials XVI
Andrei V. Kabashin; Jan J. Dubowski; David B. Geohegan, Editor(s)

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