Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling
Light-matter interactions in two-dimensional transition metal dichalcogenides (TMDs) are sensitive to the surrounding dielectric environment. Depending on the interacting strength, weak and strong exciton-photon coupling effects can occur when the exciton energy is resonant with the one of photon. H...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2022
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| Online Access: | https://hdl.handle.net/10356/156050 |
| _version_ | 1824456470805086208 |
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| author | Zhang, Xuewen Wu, Lishu Wang, Xu He, Silin Hu, Hanwei Shi, Guangchao Zhang, Xingwang Shang, Jingzhi Yu, Ting |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhang, Xuewen Wu, Lishu Wang, Xu He, Silin Hu, Hanwei Shi, Guangchao Zhang, Xingwang Shang, Jingzhi Yu, Ting |
| author_sort | Zhang, Xuewen |
| collection | NTU |
| description | Light-matter interactions in two-dimensional transition metal dichalcogenides (TMDs) are sensitive to the surrounding dielectric environment. Depending on the interacting strength, weak and strong exciton-photon coupling effects can occur when the exciton energy is resonant with the one of photon. Here we report angle-resolved spectroscopic signatures of monolayer tungsten disulfide (1L-WS2) in weak and strong exciton-photon coupling environments. Inherent optical response of 1L-WS2 in the momentum space is uncovered by employing a dielectric mirror as substrate, where the energy dispersion is angle-independent while the amplitudes increase at high detection angles. When 1L-WS2 sits on top of a dielectric layer on silicon, the resonant trapped photon weakly couples with the exciton, in which the minimum of reflection dip shifts at both sides of the crossing angle while the emitted exciton energy remains unchanged. The unusual shift of reflection dip is attributed to the presence of Fano resonance under white-light illumination. By embedding 1L-WS2 into a dielectric microcavity, strong exciton-photon coupling results in the formation of lower and upper polariton branches with an appreciable Rabi splitting of 34 meV at room temperature, where the observed blueshift of the lower polariton branch is indicative of the enhanced polariton-polariton scattering. Our findings highlight the effect of dielectric environment on angle-resolved optical response of exciton-photon interactions in a two-dimensional semiconductor, which is helpful to develop practical TMD-based architectures for photonic and polaritonic applications. [Figure not available: see fulltext.] |
| first_indexed | 2025-02-19T03:54:37Z |
| format | Journal Article |
| id | ntu-10356/156050 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:54:37Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1560502023-02-28T20:02:52Z Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling Zhang, Xuewen Wu, Lishu Wang, Xu He, Silin Hu, Hanwei Shi, Guangchao Zhang, Xingwang Shang, Jingzhi Yu, Ting School of Physical and Mathematical Sciences Science::Physics::Optics and light Science::Physics::Atomic physics::Solid state physics Light-Matter Coupling Fano Resonance Light-matter interactions in two-dimensional transition metal dichalcogenides (TMDs) are sensitive to the surrounding dielectric environment. Depending on the interacting strength, weak and strong exciton-photon coupling effects can occur when the exciton energy is resonant with the one of photon. Here we report angle-resolved spectroscopic signatures of monolayer tungsten disulfide (1L-WS2) in weak and strong exciton-photon coupling environments. Inherent optical response of 1L-WS2 in the momentum space is uncovered by employing a dielectric mirror as substrate, where the energy dispersion is angle-independent while the amplitudes increase at high detection angles. When 1L-WS2 sits on top of a dielectric layer on silicon, the resonant trapped photon weakly couples with the exciton, in which the minimum of reflection dip shifts at both sides of the crossing angle while the emitted exciton energy remains unchanged. The unusual shift of reflection dip is attributed to the presence of Fano resonance under white-light illumination. By embedding 1L-WS2 into a dielectric microcavity, strong exciton-photon coupling results in the formation of lower and upper polariton branches with an appreciable Rabi splitting of 34 meV at room temperature, where the observed blueshift of the lower polariton branch is indicative of the enhanced polariton-polariton scattering. Our findings highlight the effect of dielectric environment on angle-resolved optical response of exciton-photon interactions in a two-dimensional semiconductor, which is helpful to develop practical TMD-based architectures for photonic and polaritonic applications. [Figure not available: see fulltext.] National Research Foundation (NRF) Submitted/Accepted version J. Z. S. thanks the support of the Fundamental Research Funds for the Central Universities of China, the National Natural Science Foundation of China (No. 61904151), the Natural Science Foundation of Shaanxi (No. 2020JM-108), the Joint Research Funds of the Department of Science & Technology of Shaanxi Province and Northwestern Polytechnical University (No. 2020GXLH-Z-020). T. Y thanks the support of the Singapore National Research Foundation (NRF) under the Competitive Research Programs (No. NRF-CRP-21-2018-0007). X. W. Z. thanks the support of National Natural Science Foundation of China (No. 12174422). 2022-04-01T05:04:14Z 2022-04-01T05:04:14Z 2022 Journal Article Zhang, X., Wu, L., Wang, X., He, S., Hu, H., Shi, G., Zhang, X., Shang, J. & Yu, T. (2022). Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling. Nano Research. https://dx.doi.org/10.1007/s12274-022-4143-7 1998-0124 https://hdl.handle.net/10356/156050 10.1007/s12274-022-4143-7 2-s2.0-85126282407 en NRF-CRP-21-2018-0007 Nano Research © 2022 Tsinghua University Press. All rights reserved. This paper was published in Nano Research and is made available with permission of Tsinghua University Press application/pdf |
| spellingShingle | Science::Physics::Optics and light Science::Physics::Atomic physics::Solid state physics Light-Matter Coupling Fano Resonance Zhang, Xuewen Wu, Lishu Wang, Xu He, Silin Hu, Hanwei Shi, Guangchao Zhang, Xingwang Shang, Jingzhi Yu, Ting Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling |
| title | Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling |
| title_full | Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling |
| title_fullStr | Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling |
| title_full_unstemmed | Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling |
| title_short | Monolayer tungsten disulfide in photonic environment : angle-resolved weak and strong light-matter coupling |
| title_sort | monolayer tungsten disulfide in photonic environment angle resolved weak and strong light matter coupling |
| topic | Science::Physics::Optics and light Science::Physics::Atomic physics::Solid state physics Light-Matter Coupling Fano Resonance |
| url | https://hdl.handle.net/10356/156050 |
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