Photon antibunching in the photoluminescence spectra of a single carbon nanotube |
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Authors: | Högele Alexander Galland Christophe Winger Martin Imamoğlu Atac |
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Affiliation: | Institute of Quantum Electronics, ETH H?nggerberg, Wolfgang-Pauli-Strasse 16, CH-8093 Zürich, Switzerland. |
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Abstract: | We report the first observation of photon antibunching in the photoluminescence from single carbon nanotubes. The emergence of a fast luminescence decay component under strong optical excitation indicates that Auger processes are partially responsible for inhibiting two-photon generation. Additionally, the presence of exciton localization at low temperatures ensures that nanotubes emit photons predominantly one by one. The fact that multiphoton emission probability can be smaller than 5% suggests that carbon nanotubes could be used as a source of single photons for applications in quantum cryptography. |
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