Carbon Nanotube Color Centers in Plasmonic Nanocavities: A Path to Photon Indistinguishability at Telecom Bands
Carbon Nanotube Color Centers in Plasmonic Nanocavities: A Path to Photon Indistinguishability at Telecom Bands
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DOI：
10.1021/acs.nanolett.9b04069
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发表时间：
2019-12-01
期刊：
影响因子：
10.8
通讯作者：
Strauf, Stefan
中科院分区：
文献类型：
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作者：
Luo, Yue;He, Xiaowei;Strauf, Stefan
从固态量子发射器在电信波长处产生不可区分的单光子仍然是可扩展量子信息处理的重大挑战。在这里，我们证明了有效的产生“不可区分的”单光子直接在电信O-波段从芳基官能化的碳纳米管通过克服发射量子退相干与等离子体纳米腔。随着前所未有的单光子自发辐射时间下降到10 ps（从最初的0.7 ns）在耦合方案中产生的，我们表明在4 K的双光子干涉能见度达到0.79，即使没有应用后选择。腔增强量子产额高达74%，珀塞尔因子高达415，单光子纯度高达99%。我们的研究结果建立了为量子信息技术制造基于光纤的光子器件的能力，这些光子器件具有可以实现量子逻辑的相干特性。
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 nano tubes 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.