Year: 2023
Type: article
Abstract: Two-dimensional (2D) materials have attracted attention for quantum information science due to their ability to host single-photon emitters (SPEs). Although the properties of atomically thin materials are highly sensitive to surface modification, chemical functionalization remains unexplored in the design and control of 2D material SPEs. Here, we report a chemomechanical approach to modify SPEs in monolayer WSe2 through the synergistic combination of localized mechanical strain and noncovalent surface functionalization with aryl diazonium chemistry. Following the deposition of an aryl oligomer adlayer, the spectrally complex defect-related emission of strained monolayer WSe2 is simplified into spectrally isolated SPEs with high single-photon purity. Density functional theory calculations reveal energetic alignment between WSe2 defect states and adsorbed aryl oligomer energy levels, thus providing insight into the observed chemomechanically modified quantum emission. By revealing conditions under which chemical functionalization tunes SPEs, this work broadens the parameter space for controlling quantum emission in 2D materials.
Source: Nature Communications
Institutions: Northwestern University, SRM Institute of Science and Technology, Argonne National Laboratory, Center for Nanoscale Materials, Northwestern + Argonne Institute for Scientific and Engineering Excellence, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,290
Funders: National Science Foundation, U.S. Department of Energy, Northwestern University, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Office of Science, Materials Research Science and Engineering Center, Harvard University, Materials Research Science and Engineering Center, Northwestern University, Japan Society for the Promotion of Science, Division of Materials Research, Division of Electrical, Communications and Cyber Systems, Basic Energy Sciences
Awards: G102163711, G1169090945, NNCI: Soft Hybrid Nanotechnology Experimental (SHyNE) Resource, G1286251239, G1290118369, G1329306526, G1454922299, G1505794299, CENTER FOR MOLECULAR QUANTUM TRANSDUCTION (CMQT), G1952722069, G2101401529, G2233802770, G2287611682, G262962599, G2639066229, G2714387552, G2818701550, G3010471893, G316399430, CENTER FOR MOLECULAR QUANTUM TRANSDUCTION (CMQT), G3454132534, G3589692066, G3873851634, G3954585026, G4120964173, G4207708471, G426311843, G4285583887, G4289625387, MRSEC: Center for Multifunctional Materials, G4778125835, G4912152698, G4958141111, G498139845, G5106849484, G513797252, G5218300437, G5387317844, G5705301974, G5910536577, G6101976803, G6540817556, G6664495284, G6848031779, G6918803902, G7304483037, G7368700025, G7583137537, G7661097341, G801469781, G8084486007, Synthesis of high quality single crystals for sience of Boron Nitride, Nanoscale understanding and chemical functionalization of phosphorene and 2D InSe semiconductors, G898758523, G969889393, G993149817
OpenAlex ID: W4366204970