Quantum light generation with ultra-high spatial resolution in 2D semiconductors via ultra-low energy electron irradiation

Single photon emitters (SPEs) are building blocks of quantum technologies. Defect engineering of 2D materials is ideal to fabricate SPEs, wherein spatially deterministic and quality-preserving fabrication methods are critical for integration into quantum devices and cavities. Existing methods use co...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Dash, Ajit Kumar, Yadav, Sharad Kumar, Roux, Sebastien, Singh, Manavendra Pratap, Watanabe, Kenji, Taniguchi, Takashi, Naik, Akshay, Cedric, Robert, Xavier, Marie, Singh, Akshay
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 16.09.2024
Subjects
Defects
Density
Electron beams
Electron irradiation
Emitters
Emitters (electron)
Ion irradiation
Molybdenum disulfide
Photoluminescence
Radiation damage
Spatial resolution
Two dimensional materials
Zeeman effect
Online AccessGet full text

Cover

More Information
Summary:Single photon emitters (SPEs) are building blocks of quantum technologies. Defect engineering of 2D materials is ideal to fabricate SPEs, wherein spatially deterministic and quality-preserving fabrication methods are critical for integration into quantum devices and cavities. Existing methods use combination of strain and electron irradiation, or ion irradiation, which make fabrication complex, and limited by surrounding lattice damage. Here, we utilise only ultra-low energy electron beam irradiation (5 keV) to create dilute defect density in hBN-encapsulated monolayer MoS2, with ultra-high spatial resolution (< 50 nm, extendable to 10 nm). Cryogenic photoluminescence spectra exhibit sharp defect peaks, following power-law for finite density of single defects, and characteristic Zeeman splitting for MoS2 defect complexes. The sharp peaks have low spectral jitter (< 200 {\mu}eV), and are tuneable with gate-voltage and electron beam energy. Use of low-momentum electron irradiation, ease of processing, and high spatial resolution, will disrupt deterministic creation of high-quality SPEs.
ISSN:2331-8422