A Nanoscale Coherent Light Source
Quantum Physics
2020-07-01 v1
Abstract
Generically, a laser is composed of an optical resonator coupled to a gain medium. If the light amplification via stimulated emission dominates the mirror losses, the emitted light is coherent. Recent studies have shown that sub-wavelength sized rings of quantum emitters possess subradiant eigenmodes which mimic high-Q optical resonators. We add a continuously pumped atom as a gain medium in the ring's center creating a minimalistic coherent light source. The system behaves like a thresholdless laser, featuring a narrow linewidth well below the natural linewidth of the constituent atoms.
Cite
@article{arxiv.2003.07352,
title = {A Nanoscale Coherent Light Source},
author = {Raphael Holzinger and David Plankensteiner and Laurin Ostermann and Helmut Ritsch},
journal= {arXiv preprint arXiv:2003.07352},
year = {2020}
}
Comments
7 pages, 7 figures