We present an optical cavity with deep sub-wavelength confinement of light in a region that simultaneously works as a quantum dot. The design is based on a dielectric membrane with a buried quantum well and restricts the electron and hole wave functions to the area of the optical hotspot in order to overcome the challenge of co-locating an optical cavity with a quantum emitter. Combined with proper surface passivation, this geometry points towards the deterministic fabrication of functional quantum dots in optical cavities by lithographic means.
@article{arxiv.2312.03637,
title = {A lithographically-defined quantum dot with sub-wavelength confinement of light},
author = {George Kountouris and Anne Sofie Darket and Lea Vestergaard and Emil Vosmar Denning and Jesper Mørk and Philip Trøst Kristensen},
journal= {arXiv preprint arXiv:2312.03637},
year = {2023}
}