Nano antenna-assisted quantum dots emission into high-index planar waveguide
Abstract
Integrated quantum photonic circuits require the efficient coupling of photon sources to photonic waveguides. Hybrid plasmonic/photonic platforms are a promising approach, taking advantage of both plasmon modal confinement for efficient coupling to a nearby emitter and photonic circuitry for optical data transfer and processing. In this work, we established directional quantum dot (QD) emission coupling to a planar TiO waveguide assisted by a Yagi-Uda antenna. Antenna on waveguide is first designed by scaling radio frequency dimensions to nano-optics, taking into account the hybrid plasmonic/photonic platform. Design is then optimized by full numerical simulations. We fabricate the antenna on a TiO planar waveguide and deposit a few QDs close to the Yagi-Uda antenna. The optical characterization shows clear directional coupling originating from antenna effect. We estimate the coupling efficiency and directivity of the light emitted into the waveguide.
Keywords
Cite
@article{arxiv.2402.13557,
title = {Nano antenna-assisted quantum dots emission into high-index planar waveguide},
author = {X. Yu and J. -C. Weeber and L. Markey and J. Arocas and A. Bouhelier and A. Leray and G. Colas des Francs},
journal= {arXiv preprint arXiv:2402.13557},
year = {2024}
}