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Issue 13, 2021
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Control of light–valley interactions in 2D transition metal dichalcogenides with nanophotonic structures

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Abstract

Electronic valley in two-dimensional transition-metal dichalcogenides (2D TMDCs) offers a new degree of freedom for information storage and processing. The valley pseudospin can be optically encoded by photons with specific helicity, enabling the construction of electronic information devices with both high performance and low power consumption. Robust detection, manipulation and transport of the valley pseudospins at room temperature are still challenging because of the short lifetime of valley-polarized carriers and excitons. Integrating 2D TMDCs with nanophotonic objects such as plasmonic nanostructures provides a competitive solution to address the challenge. The research in this field is of practical interest and can also present rich physics of light–matter interactions. In this minireview, recent progress on using nanophotonic strategies to enhance the valley polarization degree, especially at room temperature, is highlighted. Open questions, major challenges, and interesting future developments in manipulating the valley information in 2D semiconductors with the help of nanophotonic structures will also be discussed.

Graphical abstract: Control of light–valley interactions in 2D transition metal dichalcogenides with nanophotonic structures

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Article information


Submitted
09 Nov 2020
Accepted
02 Mar 2021
First published
02 Mar 2021

Nanoscale, 2021,13, 6357-6372
Article type
Minireview

Control of light–valley interactions in 2D transition metal dichalcogenides with nanophotonic structures

S. Li, H. Wang, J. Wang, H. Chen and L. Shao, Nanoscale, 2021, 13, 6357 DOI: 10.1039/D0NR08000D

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