A realistic fabrication and design concept for quantum gates based on single emitters integrated in plasmonic-dielectric waveguide structures

Abstract

Tremendous enhancement of light-matter interaction in plasmonic-dielectric hybrid devices allows for non-linearities at the level of single emitters and few photons, such as single photon transistors. However, constructing integrated components for such devices is technologically extremely challenging. We tackle this task by lithographically fabricating an on-chip plasmonic waveguide-structure connected to far-field in- and out-coupling ports via low-loss dielectric waveguides. We precisely describe our lithographic approach and characterize the fabricated integrated chip. We find excellent agreement with rigorous numerical simulations. Based on these findings we perform a numerical optimization and calculate concrete numbers for a plasmonic single-photon transistor.

Silver nanowires with optimized silica coating as versatile plasmonic resonators

“…We conclude that our modified synthesis method opens the door for the construction of welldefined coupled systems of quantum emitters and plasmonic resonators and their usage in integrated optical devices [19][20][21] , i.e. all-optical transistors 52,53 or active plasmonic sensors 54 . Such coatings have been frequently used for gold nanoparticles so far but are now accessible to silver nanostructures like nanowires, too.…”

On-chip integration of single solid-state quantum emitters with a SiO2 photonic platform

“…For demanding applications, e.g. the experimental realization of a single photon non-linear device [28], an increased coupling efficiency between emitter and guided mode would be desirable. In the following we will comment on some prospects for increasing the coupling efficiency far beyond the theoretical value of ∼ 5% of our fabricated device, but at the same time have higher manufacturing and/or assembly requirements.…”

Light–Matter Interaction of Single Quantum Emitters with Dielectric Nanostructures

“…QDs are much more photostable than organic molecules, but they still face a blinking issue, in other words, the strong fluctuations of the luminescence, and require working conditions of a low temperature [15]. Furthermore, beside the emitters in this review, different quantum systems have also been proposed by doping single organic molecules into crystalline thin film, such as dibenzoterrylene molecules horizontally aligned with the plane of the thin film of anthracene, which have showed the near-infrared single photon emission stable and bright at room temperature [49,50].…”