Berlin 2015 – scientific programme

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O: Fachverband Oberflächenphysik

O 75: Plasmonics and Nanooptics

O 75.7: Poster

Wednesday, March 18, 2015, 18:15–21:00, Poster A

Positioning colloidal nanocrystals next to plasmonic nanostructures using electron-beam lithography — •Marvin Berger^1,3,4, Daniela Wolf¹, Thorsten Schumacher¹, Stuart Earl^2,3, Daniel Gomez^3,4, and Markus Lippitz¹ — ¹Experimentalphysik III, Universität Bayreuth, Germany — ²School of Physics, The University of Melbourne, Parkville, Victoria, 3010, Australia — ³The Melbourne Centre for Nanofabrication (MCN), Australian National Fabrication Facility, Clayton, Victoria, 3168, Australia — ⁴CSIRO, Materials Science and Engineering, Private Bag 33, Clayton, Victoria 3168, Australia

The plasmon resonance of a nobel-metal nanoparticle leads to an increased optical near-field. This can be used to enhance nonlinear optical effects such as third-harmonic generation or transient absorption. However, this requires that the nonlinear object is positioned in the plasmonic near-field.

We use semiconducting colloidal CdSe nanocrystals, localised within the range of some tens of nanometers to a gold or silver nanorod. Our approach to create such well defined structures is two-step Electron Beam Lithography (EBL). We discuss details of this process, especially the placement of the colloidal nanocrystals. Moreover we will use data from AFM, SEM and optical measurements to characterize our structures.