Bosonic condensation of exciton-polaritons in an atomically thin crystal
Abstract
The emergence of two-dimensional crystals has revolutionized modern solid-state physics. From a fundamental point of view, the enhancement of charge carrier correlations has sparked enormous research activities in the transport- and quantum optics communities. One of the most intriguing effects, in this regard, is the bosonic condensation and spontaneous coherence of many-particle complexes. Here, we find compelling evidence of bosonic condensation of exciton-polaritons emerging from an atomically thin crystal of MoSe2 embedded in a dielectric microcavity under optical pumping. The formation of the condensate manifests itself in a sudden increase of luminescence intensity in a threshold-like manner, and a significant spin-polarizability in an externally applied magnetic field. Spatial coherence is mapped out via highly resolved real-space interferometry, revealing a spatially extended condensate. Our device represents a decisive step towards the implementation of coherent light-sources based on atomically thin crystals, as well as non-linear, valleytronic coherent devices.
Keywords
Cite
@article{arxiv.2009.11885,
title = {Bosonic condensation of exciton-polaritons in an atomically thin crystal},
author = {Carlos Anton-Solanas and Maximilian Waldherr and Martin Klaas and Holger Suchomel and Hui Cai and Evgeny Sedov and Alexey V. Kavokin and Sefaattin Tongay and Kenji Watanabe and Takashi Taniguchi and Sven Höfling and Christian Schneider},
journal= {arXiv preprint arXiv:2009.11885},
year = {2021}
}
Comments
Main text: 11 pages, 5 figures, Supplementary Materials: 4 pages, 5 figures