Enhanced Single-Photon Emission from Carbon-Nanotube Dopant States Coupled to Silicon Microcavities

Nano Letters
Akihiro IshiiY K Kato

Abstract

Single-walled carbon nanotubes are a promising material as quantum light sources at room temperature and as nanoscale light sources for integrated photonic circuits on silicon. Here, we show that the integration of dopant states in carbon nanotubes and silicon microcavities can provide bright and high-purity single-photon emitters on a silicon photonics platform at room temperature. We perform photoluminescence spectroscopy and observe the enhancement of emission from the dopant states by a factor of ∼50, and cavity-enhanced radiative decay is confirmed using time-resolved measurements, in which a ∼30% decrease of emission lifetime is observed. The statistics of photons emitted from the cavity-coupled dopant states are investigated by photon-correlation measurements, and high-purity single photon generation is observed. The excitation power dependence of photon emission statistics shows that the degree of photon antibunching can be kept high even when the excitation power increases, while the single-photon emission rate can be increased to ∼1.7 × 107 Hz.

References

Oct 31, 2003·Nature·Yoshihiro AkahaneSusumu Noda
May 10, 2005·Science·Feng WangTony F Heinz
Jun 4, 2008·Physical Review Letters·Alexander HögeleAtac Imamoğlu
Jun 14, 2012·Nature Communications·P GallikerD Poulikakos
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Citations

Jul 31, 2019·Nanoscale·Lucas LangeAchim Hartschuh
Feb 23, 2020·Advanced Materials·Zhongjie HuangYuHuang Wang
Apr 8, 2020·Advanced Materials·William A Gaviria Rojas, Mark C Hersam
Sep 26, 2019·Advanced Materials·Yani ChenNedjma Bendiab
Jul 27, 2021·ACS Nano·Surendra B AnantharamanDeep Jariwala
May 8, 2019··Y. K. Kato, Y. K. Kato

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