Special Section on Optics, Spectroscopy, and Nanophotonics of Quantum Dots

Emission redistribution from a quantum dot-bowtie nanoantenna

[+] Author Affiliations
Armin Regler

Technische Universität München, Walter Schottky Institut and Physik Department, Am Coulombwall 4, Garching 85748, Germany

Technische Universität München, Institute for Advanced Study, Lichtenbergstrasse 2a, Garching 85748, Germany

Konrad Schraml, Matthias Spiegl, Kai Müller, Michael Kaniber

Technische Universität München, Walter Schottky Institut and Physik Department, Am Coulombwall 4, Garching 85748, Germany

Anna A. Lyamkina

A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Pr. Lavrentieva 13, Novosibirsk 630090, Russia

Jelena Vuckovic

Technische Universität München, Institute for Advanced Study, Lichtenbergstrasse 2a, Garching 85748, Germany

Stanford University, E. L. Ginzton Laboratory, 348, Via Pueblo Mall, Stanford, California 94305, United States

Jonathan J. Finley

Technische Universität München, Walter Schottky Institut and Physik Department, Am Coulombwall 4, Garching 85748, Germany

Nanosystems Initiative Munich, Schellingstraße 4, München 85748, Germany

J. Nanophoton. 10(3), 033509 (Mar 11, 2016). doi:10.1117/1.JNP.10.033509
History: Received December 21, 2015; Accepted February 16, 2016
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Abstract.  We present a combined experimental and simulation study of a single self-assembled InGaAs quantum dot coupled to a nearby (25  nm) plasmonic antenna. Microphotoluminescence spectroscopy shows a 2.4× increase of intensity, which is attributed to spatial far-field redistribution of the emission from the quantum dot-antenna system. Power-dependent studies show similar saturation powers of 2.5  μW for both coupled and uncoupled quantum dot emission in polarization-resolved measurements. Moreover, time-resolved spectroscopy reveals the absence of Purcell enhancement of the quantum dot coupled to the antenna as compared with an uncoupled dot, yielding comparable exciton lifetimes of τ0.5  ns. This observation is supported by numerical simulations, suggesting only minor Purcell-effects of <2× for emitter–antenna separations >25  nm. The observed increased emission from a coupled quantum dot–plasmonic antenna system is found to be in good qualitative agreement with numerical simulations and will lead to a better understanding of light–matter coupling in such semiconductor–plasmonic hybrid systems.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Armin Regler ; Konrad Schraml ; Anna A. Lyamkina ; Matthias Spiegl ; Kai Müller, et al.
"Emission redistribution from a quantum dot-bowtie nanoantenna", J. Nanophoton. 10(3), 033509 (Mar 11, 2016). ; http://dx.doi.org/10.1117/1.JNP.10.033509


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