High purcell factor due to coupling of a single emitter to a dielectric slot waveguide.

Kolchin, Pavel; Pholchai, Nitipat; Mikkelsen, Maiken H; Oh, Jinyong; Ota, Sadao; Islam, M Saif; Yin, Xiaobo; Zhang, Xiang · Nano Lett · 2015

basic_science · Level V

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Abstract

We demonstrate an all-dielectric quantum electrodynamical nanowire-slab system with a single emitter that concentrates the extremely intense light at the scale of 10 × 75 nm(2). The quantum dot exhibits a record high 31-fold spontaneous decay rate enhancement, its optical saturation and blinking are strongly suppressed, and 80% of emission couples into a waveguide mode.