Prof. Zhangkai Zhou Profile

Prof. Zhangkai Zhou

at Sun Yat-Sen Univ

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Proceedings Article | 29 August 2017 Paper

Nanophotonic enhanced quantum emitters

Xin Li, Zhang-Kai Zhou, Ying Yu, Malte Gather, Andrea Di Falco

Proceedings Volume 10359, 103590A (2017) https://doi.org/10.1117/12.2273786

KEYWORDS: Quantum dots, Nanophotonics, Single photon, Plasmonics, Electron beams, Metamaterials, Nanotechnology, Nanoplasmonics

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Quantum dots are excellent solid-state quantum sources, because of their stability, their narrow spectral linewidth, and radiative lifetime in the range of 1ns. Most importantly, they can be integrated into more complex nanophononics devices, to realize high quality quantum emitters of single photons or entangled photon sources. Recent progress in nanotechnology materials and devices has opened a number of opportunities to increase, optimize and ultimately control the emission property of single quantum dot. In this work, we present an approach that combines the properties of quantum dots with the flexibility of light control offered by nanoplasmonics and metamaterials structuring. Specifically, we show the nanophotonic enhancement of two types of quantum dots devices. The quantum dots are inserted into optical-positioned micropillar cavities, or decorated on the facets of core-shell GaAs/AlGaAs nanowires, fabricated with a bottom-up approach. In both cases, the metallic nanofeatures, which are designed to control the emission and the polarization state of the emitted light, are realized via direct electron-beam-induced deposition. This approach permits to create three-dimensional features with nanometric resolution and positional accuracy, and does not require wet lithographic steps and previous knowledge of the exact spatial arrangement of the quantum devices.

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