Enhanced Single-Photon Emission from Carbon-Nanotube Dopant States Coupled to Silicon Microcavities.
Nano Lett
; 18(6): 3873-3878, 2018 06 13.
Article
em En
| MEDLINE
| ID: mdl-29781621
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 â¼50, and cavity-enhanced radiative decay is confirmed using time-resolved measurements, in which a â¼30% 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 â¼1.7 × 107 Hz.
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MEDLINE
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En
Ano de publicação:
2018
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Article