| Autor: |
Regler, A., Schraml, K., Lyamkina, A., Spiegl, M., Müller, K., Vuckovic, J., Finley, J. J., Kaniber, M. |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
J. Nanophoton. 10, 033509 (2016) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1117/1.JNP.10.033509 |
| Popis: |
We present a combined experimental and simulation study of a single self-assembled InGaAs quantum dot coupled to a nearby ($\sim 25nm$) plasmonic antenna. Micro-photoluminescence spectroscopy shows a $\sim 2.4\times$ 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 $2.5\mu W$ 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 to an uncoupled dot, yielding comparable exciton lifetimes of $\tau\sim0.5ns$. This observation is supported by numerical simulations, suggesting only minor Purcell-effects of $<2\times$ for emitter-antenna separations $>25nm$. 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 novel semiconductor-plasmonic hybrid systems |
| Databáze: |
arXiv |
| Externí odkaz: |
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