Nano Lett
Nanoscale Quantum Photonics Laboratory, RIKEN , Saitama 351-0198 , Japan.
Published: June 2018
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 × 10 Hz.
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http://dx.doi.org/10.1021/acs.nanolett.8b01170 | DOI Listing |
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Towson University, 8000 York Road, SC 3301B, 21252, Towson, UNITED STATES OF AMERICA.
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School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China.
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Liquid Crystal Research Laboratory, Department of Physics, University of Lucknow, Lucknow, Uttar Pradesh 226007, India.
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Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
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