Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.32: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

Hybrid Plasmonic Nanostructures: Characterization of Coupled Quantum Dot - Nanoantenna Systems — •Cody Friesen, Manuel Peter, and Stefan Linden — Physikalisches Institut, Universität Bonn, Nußallee 12, 53115 Bonn, Germany

This poster will provide an overview of the fabrication and characterization methods we use to investigate hybrid plasmonic nanostructures. Specifically, our structures consist of a quantum dot strongly coupled to a nanoscale gold dipole antenna.

The fabrication utilizes electron beam lithography, with a PMMA resist. First a PMMA mask defining the antennas is created, and gold evaporation is used to deposit the actual material. Following the structure fabrication a second PMMA mask is created that describes the areas for quantum dot deposition. A chemical linking process binds the quantum dots to the exposed substrate.

The antennas have resonances tuned to the excitation wavelength of the quantum dots (λ=780 nm), which are pumped via a green laser. The red-shifted emission light of the dots is collected using a confocal microscope and fiber coupled either into a spectrometer or into a lifetime measurement device which uses a photodiode. The diode is used for dot lifetime and emission intensity measurements, while the spectrometer allows for the measurement of spectral shifts and changes in the spectral structure.