Carbon nanotube color centers in plasmonic nanocavities: A path to photon indistinguishability at telecom bands

Yue Luo, Xiaowei He, Younghee Kim, Jeffrey L. Blackburn, Stephen K. Doorn, Han Htoon, Stefan Strauf

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Indistinguishable single photon generation at telecom wavelengths from solid-state quantum emitters remains a significant challenge to scalable quantum information processing. Here we demonstrate efficient generation of "indistinguishable" single photons directly in the telecom O-band from aryl-functionalized carbon nanotubes by overcoming the emitter quantum decoherence with plasmonic nanocavities. With an unprecedented single-photon spontaneous emission time down to 10 ps (from initially 0.7 ns) generated in the coupling scheme, we show a two-photon interference visibility at 4 K reaching up to 0.79, even without applying post selection. Cavity-enhanced quantum yields up to 74% and Purcell factors up to 415 are achieved with single-photon purities up to 99%. Our results establish the capability to fabricate fiber-based photonic devices for quantum information technology with coherent properties that can enable quantum logic.

Original languageEnglish
Pages (from-to)9037-9044
Number of pages8
JournalNano Letters
DOIs
StatePublished - 2019

Keywords

  • Plasmonic nanocavities
  • carbon nanotubes
  • indistinguishable single photons
  • telecommunication bands

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