Dresden 2014 – wissenschaftliches Programm

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

O: Fachverband Oberflächenphysik

O 98: Plasmonics and Nanooptics V

O 98.4: Vortrag

Freitag, 4. April 2014, 11:15–11:30, TRE Ma

Fabrication of hybrid nanostructures composed of quantum dots and plasmonic nanoparticles — •Manuel Peter, Cody Friesen, and Stefan Linden — Physikalisches Institut, Universität Bonn, Nußallee 12, 53115 Bonn, Germany

In this contribution, we present a two-step electron lithography process for the reliable positioning of colloidal quantum dots in the vicinity of plasmonic nanoparticles with sub-50-nm spatial accuracy. In the first lithography step, gold nanoparticles are fabricated with spectral features at the emission wavelength of the used quantum dots (λ=780 nm). Following this, a second layer of PMMA is deposited on the sample. Then a mask is written with the electron beam to define the positions for the colloidal quantum dots. After development, the surface of the substrate as well as that of the quantum dots are chemically modified such that a linker molecule can bind the quantum dots to the predefined spots. After removing the PMMA mask, we obtain hybrid nanostructures composed of gold nanoparticles and quantum dots. With our fabrication method, we will be able to precisely control all geometrical parameters of the hybrid nanostructures. This opens interesting opportunities to study the interaction of quantum dot with particle plasmon resonances via fluorescence microscopy and life-time measurements.