Large-scale quantum-emitter arrays in atomically thin semiconductors

Nature Communications
Carmen Palacios-BerraqueroMete Atatüre

Abstract

Quantum light emitters have been observed in atomically thin layers of transition metal dichalcogenides. However, they are found at random locations within the host material and usually in low densities, hindering experiments aiming to investigate this new class of emitters. Here, we create deterministic arrays of hundreds of quantum emitters in tungsten diselenide and tungsten disulphide monolayers, emitting across a range of wavelengths in the visible spectrum (610-680 nm and 740-820 nm), with a greater spectral stability than their randomly occurring counterparts. This is achieved by depositing monolayers onto silica substrates nanopatterned with arrays of 150-nm-diameter pillars ranging from 60 to 190 nm in height. The nanopillars create localized deformations in the material resulting in the quantum confinement of excitons. Our method may enable the placement of emitters in photonic structures such as optical waveguides in a scalable way, where precise and accurate positioning is paramount.

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Citations

Jul 20, 2018·Chemical Society Reviews·Victor W BrarDeep Jariwala
Feb 8, 2018·Nature Communications·Lukas MennelThomas Mueller
Jul 5, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jhih-Sian TuBeata E Kardynał
Dec 4, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Sven RodtTobias Heindel
Feb 23, 2020·Advanced Materials·Zhongjie HuangYuHuang Wang
Apr 4, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Thorsten DeilmannUrsula Wurstbauer
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Dec 12, 2020·Advanced Materials·De-Sheng LiuZhiming Wang

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Methods Mentioned

BETA
electron beam lithography
atomic force microscopy
AFM
optical microscopy

Software Mentioned

1L
WS

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