Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 4: Plasmonics and nanooptics: Fabrication and characterization

O 4.8: Vortrag

Montag, 12. März 2018, 12:15–12:30, MA 041

Nano-forging of Gold Rods with Light — •Francis Schuknecht, Christoph Maier, Anastasia Babynina, and Theobald Lohmüller — Ludwig Maximilians Universität München, Deutschland

V-shaped plasmonic nanoantennas display useful properties as building blocks for meta- surfaces and flat optical devices. Yet, the fabrication of such particles is not a simple task. E-beam lithography is widely used, but shows limitations when it comes to the fabrication of very small nanostructures with high crystallinity. The bending and printing of straight nanorods into desired patterns with light has shown to be a valid alternative approach [1].

Here, we discuss the physical processes governing the bending and orientation of gold nanorods with widths between 8 and 50nm and a length of up to 300nm for varying laser intensities. Additionally to the usage of the particle longitudinal surface plasmon resonance, the transverse plasmonic mode is employed for particle manipulation to examine localised heating effects as a function of the nanorod geometry. The understanding, and parameterisation of the nano-forging process represents a first step to the in-situ creation of efficient ultrathin optical devices.

[1] A. Babynina et al.: Bending Gold Nanorods with Light; Nano Lett, 2016 16(10), pp 6485-6490