Phonon-assisted upconversion in twisted two-dimensional semiconductors

Phonon-assisted photon upconversion (UPC) is an anti-Stokes process in which incident photons achieve higher energy emission by absorbing phonons. This letter studies phonon-assisted UPC in twisted 2D semiconductors, in which an inverted contrast between UPC and conventional photoluminescence (PL) o...

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Autores principales: Dai, Yuchen, Qi, Pengfei, Tao, Guangyi, Yao, Guangjie, Shi, Beibei, Liu, Zhixin, Liu, Zhengchang, He, Xiao, Peng, Pu, Dang, Zhibo, Zheng, Liheng, Zhang, Tianhao, Gong, Yongji, Guan, Yan, Liu, Kaihui, Fang, Zheyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
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Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9806105/
https://www.ncbi.nlm.nih.gov/pubmed/36588111
http://dx.doi.org/10.1038/s41377-022-01051-9
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author Dai, Yuchen
Qi, Pengfei
Tao, Guangyi
Yao, Guangjie
Shi, Beibei
Liu, Zhixin
Liu, Zhengchang
He, Xiao
Peng, Pu
Dang, Zhibo
Zheng, Liheng
Zhang, Tianhao
Gong, Yongji
Guan, Yan
Liu, Kaihui
Fang, Zheyu
author_facet Dai, Yuchen
Qi, Pengfei
Tao, Guangyi
Yao, Guangjie
Shi, Beibei
Liu, Zhixin
Liu, Zhengchang
He, Xiao
Peng, Pu
Dang, Zhibo
Zheng, Liheng
Zhang, Tianhao
Gong, Yongji
Guan, Yan
Liu, Kaihui
Fang, Zheyu
author_sort Dai, Yuchen
collection PubMed
description Phonon-assisted photon upconversion (UPC) is an anti-Stokes process in which incident photons achieve higher energy emission by absorbing phonons. This letter studies phonon-assisted UPC in twisted 2D semiconductors, in which an inverted contrast between UPC and conventional photoluminescence (PL) of WSe(2) twisted bilayer is emergent. A 4-fold UPC enhancement is achieved in 5.5° twisted bilayer while PL weakens by half. Reduced interlayer exciton conversion efficiency driven by lattice relaxation, along with enhanced pump efficiency resulting from spectral redshift, lead to the rotation-angle-dependent UPC enhancement. The counterintuitive phenomenon provides a novel insight into a unique way that twisted angle affects UPC and light-matter interactions in 2D semiconductors. Furthermore, the UPC enhancement platform with various superimposable means offers an effective method for lighting bilayers and expanding the application prospect of 2D stacked van der Waals devices.
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spelling pubmed-98061052023-01-03 Phonon-assisted upconversion in twisted two-dimensional semiconductors Dai, Yuchen Qi, Pengfei Tao, Guangyi Yao, Guangjie Shi, Beibei Liu, Zhixin Liu, Zhengchang He, Xiao Peng, Pu Dang, Zhibo Zheng, Liheng Zhang, Tianhao Gong, Yongji Guan, Yan Liu, Kaihui Fang, Zheyu Light Sci Appl Article Phonon-assisted photon upconversion (UPC) is an anti-Stokes process in which incident photons achieve higher energy emission by absorbing phonons. This letter studies phonon-assisted UPC in twisted 2D semiconductors, in which an inverted contrast between UPC and conventional photoluminescence (PL) of WSe(2) twisted bilayer is emergent. A 4-fold UPC enhancement is achieved in 5.5° twisted bilayer while PL weakens by half. Reduced interlayer exciton conversion efficiency driven by lattice relaxation, along with enhanced pump efficiency resulting from spectral redshift, lead to the rotation-angle-dependent UPC enhancement. The counterintuitive phenomenon provides a novel insight into a unique way that twisted angle affects UPC and light-matter interactions in 2D semiconductors. Furthermore, the UPC enhancement platform with various superimposable means offers an effective method for lighting bilayers and expanding the application prospect of 2D stacked van der Waals devices. Nature Publishing Group UK 2023-01-02 /pmc/articles/PMC9806105/ /pubmed/36588111 http://dx.doi.org/10.1038/s41377-022-01051-9 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Dai, Yuchen
Qi, Pengfei
Tao, Guangyi
Yao, Guangjie
Shi, Beibei
Liu, Zhixin
Liu, Zhengchang
He, Xiao
Peng, Pu
Dang, Zhibo
Zheng, Liheng
Zhang, Tianhao
Gong, Yongji
Guan, Yan
Liu, Kaihui
Fang, Zheyu
Phonon-assisted upconversion in twisted two-dimensional semiconductors
title Phonon-assisted upconversion in twisted two-dimensional semiconductors
title_full Phonon-assisted upconversion in twisted two-dimensional semiconductors
title_fullStr Phonon-assisted upconversion in twisted two-dimensional semiconductors
title_full_unstemmed Phonon-assisted upconversion in twisted two-dimensional semiconductors
title_short Phonon-assisted upconversion in twisted two-dimensional semiconductors
title_sort phonon-assisted upconversion in twisted two-dimensional semiconductors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9806105/
https://www.ncbi.nlm.nih.gov/pubmed/36588111
http://dx.doi.org/10.1038/s41377-022-01051-9
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