期刊
NANO LETTERS
卷 14, 期 7, 页码 4102-4106出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl501648f
关键词
Quantum dot; nanowire; single photon emission; waveguide modes; Fourier microscopy
类别
资金
- The Netherlands Organization for Scientific Research (NWO)
- Dutch Organization for Fundamental Research on Matter (FOM)
- European Research Council
- European Union [601126]
Quantum communication as well as integrated photonic circuits require single photons propagating in a well-defined Gaussian mode. However, tailoring the emission mode to a Gaussian remains an unsolved challenge for solid-state quantum emitters due to their random positioning in the host material or photonic structure. Here, we overcome these limitations by embedding a semiconductor quantum dot in a tapered nanowire waveguide. Owing to the deterministic positioning of the emitter in the waveguide, we demonstrate a Gaussian emission profile in the far field. Hence, we further couple the emission into a single-mode optical fiber with a record efficiency of 93%, thereby addressing a major hurdle for practical implementation of single photon sources in emerging photonic technologies.
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