Abstract
Quantum emitters (QEs) in two-dimensional transition metal dichalcogenides (2D TMDCs) have advanced to the forefront of quantum communication and transduction research. To date, QEs capable of operating in O-C telecommunication bands have not been demonstrated in TMDCs. Here we report site-controlled creation of telecom QEs emitting over the 1080 to 1550 nm telecommunication wavelength range via coupling of 2D molybdenum ditelluride (MoTe2) to strain inducing nano-pillar arrays. Hanbury Brown and Twiss experiments conducted at 10 K reveal clear photon antibunching with 90% single-photon purity. The photon antibunching can be observed up to liquid nitrogen temperature (77 K). Polarization analysis further reveals that while some QEs display cross-linearly polarized doublets with ~1 meV splitting resulting from the strain induced anisotropic exchange interaction, valley degeneracy is preserved in other QEs. Valley Zeeman splitting as well as restoring of valley symmetry in cross-polarized doublets are observed under 8 T magnetic field.
| Original language | English |
|---|---|
| Article number | 6753 |
| Journal | Nature Communications |
| Volume | 12 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 2021 |
| Externally published | Yes |
Funding
We acknowledge the helpful discussion and technical support from Dr. Christopher Lane, Dr. Jianxin Zhu, Dr. Andrew Jones, and Mr. John Kevin Scott Baldwin. This work was performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory (LANL), an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy’s NNSA, under contract 89233218CNA000001. Deterministic quantum emitter creation capability was developed under the support of DOE BES, QIS Infrastructure Development Program BES LANL22. H.Z., Y.Z., and H.H. acknowledge partial support form Laboratory Directed Research and Development (LDRD) program 20200104DR. H.H. is also partially supported by Quantum Science Center. M.T.P. is supported by LDRD 20190516ECR. H.Z. also acknowledge a partial support from LANL Director’s Postdoctoral Fellow Award.