Dresden 2014 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 28: Nanomaterials I - Synthesis of advanced nanostructures

MM 28.3: Talk

Tuesday, April 1, 2014, 12:30–12:45, IFW A

Optical printing of gold nano resonators — •Andreas Graw, Spas Nedev, Theobald Lohmüller, and Jochen Feldmann — Photonics and Optoelectronics Group, Physics Department and CeNS, Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 München, Germany

Plasmonic coupling between two closely apposed gold nanoparticles leads to a strong enhancement of the electromagnetic field in the nanoparticle gap. Such strongly coupled nanostructures, or plasmonic nanoantennas, offer outstanding capabilities for label-free sensing, spectroscopy, and optical manipulation at the nanoscale [1].

However, the exact positioning of individual nanoparticles right next to each other is challenging and requires high-end nanofabrication methods such as eBeam lithography or manipulation with an AFM tip. Here, we introduce an all optical approach to pattern gold nanoparticles with nanoscale accuracy by optical forces [2]. In this context, we will demonstrate how individual gold particles can be printed on a glass substrate with light and discuss strategies to apply this approach for the fabrication of plasmonic nanoantennas.

[1] Ringler, M.; Nano Lett. 2008, 8(2), 485-490

[2] Urban, A; Nano Lett. 2010, 10(12), 4794-4798