Carbon Nanotube Color Centers in Plasmonic Nanocavities: A Path to Photon Indistinguishability at Telecom Bands

作者：Yue Luo, Xiaowei He, Younghee Kim, Jeffrey L. Blackburn, Stephen K. Doorn, Han Htoon, Stefan Strauf · 发表于：Nano Letters · 年份：2019 · DOI：10.1021/acs.nanolett.9b04069 · 被引用次数：50 · 研究领域：Photonic and Optical Devices、Mechanical and Optical Resonators、Quantum Information and Cryptography

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.