Enhancing the optical excitation efficiency of a single self-assembled quantum dot with a plasmonic nanoantenna.
We demonstrate how the controlled positioning of a plasmonic nanoparticle modifies the photoluminescence of a single epitaxial GaAs quantum dot. The antenna particle leads to an increase of the luminescence intensity by about a factor of 8. Spectrally and temporally resolved photoluminescence measurements prove an increase of the quantum dot’s excitation rate.
4th Physics Institute and Research Center SCOPE, University of Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany.
Markus
M
Pfeiffer
Klas
K
Lindfors
Christian
C
Wolpert
Paola
P
Atkinson
Mohamed
M
Benyoucef
Armando
A
Rastelli
Oliver G
OG
Schmidt
Harald
H
Giessen
Markus
M
Lippitz
D003460:Crystallization / Q000379:methods*; D008027:Light; D008029:Lighting / Q000379:methods*; D008422:Materials Testing; D045663:Quantum Dots; D011829:Radiation Dosage; D020349:Surface Plasmon Resonance / Q000379:methods*