Ultrathin WS2 Polariton Waveguide for Efficient Light Guiding

Seong Won Lee; Jong Seok Lee; Woo Hun Choi; Su Hyun Gong

doi:10.1002/adom.202300069

Ultrathin WS₂ Polariton Waveguide for Efficient Light Guiding

Seong Won Lee, Jong Seok Lee, Woo Hun Choi, Su Hyun Gong

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Light confinement to sub-wavelength scales is actively studied for nanophotonic applications because it gives rise to intriguing optical properties with enhanced light-matter interaction. Herein, an ultrathin exciton–polariton waveguide based on a WS₂ multilayer is proposed for sub-wavelength light guiding. A WS₂ waveguide supports guided exciton–polariton modes even with a few tens of nanometers of thickness. It is theoretically confirmed that the WS₂ waveguide has significantly lower propagation loss than a plasmonic mode, although its thickness may be similar to that of a plasmonic waveguide. By injecting white light into a fabricated WS₂ waveguide, light guiding is experimentally demonstrated through a 20 nm thick WS₂ waveguide. Notably, this study integrated the WS₂ waveguide with a WSe₂ monolayer to demonstrate the coupling of monolayer emission to the polariton waveguide. The results suggest that WS₂ multilayers provide a novel material platform with potential for nanophotonic applications, including ultrathin optical integrated circuits.

Original language	English
Article number	2300069
Journal	Advanced Optical Materials
Volume	11
Issue number	16
DOIs	https://doi.org/10.1002/adom.202300069
Publication status	Published - 2023 Aug 21

Bibliographical note

Funding Information:
The authors acknowledge the support from Prof. J. Joo and S. Lee for the fabrication process. This work was supported by the National Research Foundation of Korea (NRF‐2019R1A2C2003313 and NRF‐2022R1A4A1034315) and the National R&D Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3F3A2A03017083). The authors acknowledge support provided by the Samsung Science and Technology Foundation (SSTF‐BA1902‐03) and the Korea University Grant.

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

exciton–polariton waveguides
transition metal dichalcogenides waveguides
ultrathin waveguides
WS2 multilayer

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

Access to Document

10.1002/adom.202300069

Cite this

@article{ad764a37f78e420f9a76ec7a200e5fc8,

title = "Ultrathin WS2 Polariton Waveguide for Efficient Light Guiding",

abstract = "Light confinement to sub-wavelength scales is actively studied for nanophotonic applications because it gives rise to intriguing optical properties with enhanced light-matter interaction. Herein, an ultrathin exciton–polariton waveguide based on a WS2 multilayer is proposed for sub-wavelength light guiding. A WS2 waveguide supports guided exciton–polariton modes even with a few tens of nanometers of thickness. It is theoretically confirmed that the WS2 waveguide has significantly lower propagation loss than a plasmonic mode, although its thickness may be similar to that of a plasmonic waveguide. By injecting white light into a fabricated WS2 waveguide, light guiding is experimentally demonstrated through a 20 nm thick WS2 waveguide. Notably, this study integrated the WS2 waveguide with a WSe2 monolayer to demonstrate the coupling of monolayer emission to the polariton waveguide. The results suggest that WS2 multilayers provide a novel material platform with potential for nanophotonic applications, including ultrathin optical integrated circuits.",

keywords = "exciton–polariton waveguides, transition metal dichalcogenides waveguides, ultrathin waveguides, WS2 multilayer",

author = "Lee, {Seong Won} and Lee, {Jong Seok} and Choi, {Woo Hun} and Gong, {Su Hyun}",

note = "Funding Information: The authors acknowledge the support from Prof. J. Joo and S. Lee for the fabrication process. This work was supported by the National Research Foundation of Korea (NRF‐2019R1A2C2003313 and NRF‐2022R1A4A1034315) and the National R&D Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3F3A2A03017083). The authors acknowledge support provided by the Samsung Science and Technology Foundation (SSTF‐BA1902‐03) and the Korea University Grant. Publisher Copyright: {\textcopyright} 2023 Wiley-VCH GmbH.",

year = "2023",

month = aug,

day = "21",

doi = "10.1002/adom.202300069",

language = "English",

volume = "11",

journal = "Advanced Optical Materials",

issn = "2195-1071",

publisher = "John Wiley and Sons Inc.",

number = "16",

}

TY - JOUR

T1 - Ultrathin WS2 Polariton Waveguide for Efficient Light Guiding

AU - Lee, Seong Won

AU - Lee, Jong Seok

AU - Choi, Woo Hun

AU - Gong, Su Hyun

N1 - Funding Information: The authors acknowledge the support from Prof. J. Joo and S. Lee for the fabrication process. This work was supported by the National Research Foundation of Korea (NRF‐2019R1A2C2003313 and NRF‐2022R1A4A1034315) and the National R&D Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3F3A2A03017083). The authors acknowledge support provided by the Samsung Science and Technology Foundation (SSTF‐BA1902‐03) and the Korea University Grant. Publisher Copyright: © 2023 Wiley-VCH GmbH.

PY - 2023/8/21

Y1 - 2023/8/21

N2 - Light confinement to sub-wavelength scales is actively studied for nanophotonic applications because it gives rise to intriguing optical properties with enhanced light-matter interaction. Herein, an ultrathin exciton–polariton waveguide based on a WS2 multilayer is proposed for sub-wavelength light guiding. A WS2 waveguide supports guided exciton–polariton modes even with a few tens of nanometers of thickness. It is theoretically confirmed that the WS2 waveguide has significantly lower propagation loss than a plasmonic mode, although its thickness may be similar to that of a plasmonic waveguide. By injecting white light into a fabricated WS2 waveguide, light guiding is experimentally demonstrated through a 20 nm thick WS2 waveguide. Notably, this study integrated the WS2 waveguide with a WSe2 monolayer to demonstrate the coupling of monolayer emission to the polariton waveguide. The results suggest that WS2 multilayers provide a novel material platform with potential for nanophotonic applications, including ultrathin optical integrated circuits.

AB - Light confinement to sub-wavelength scales is actively studied for nanophotonic applications because it gives rise to intriguing optical properties with enhanced light-matter interaction. Herein, an ultrathin exciton–polariton waveguide based on a WS2 multilayer is proposed for sub-wavelength light guiding. A WS2 waveguide supports guided exciton–polariton modes even with a few tens of nanometers of thickness. It is theoretically confirmed that the WS2 waveguide has significantly lower propagation loss than a plasmonic mode, although its thickness may be similar to that of a plasmonic waveguide. By injecting white light into a fabricated WS2 waveguide, light guiding is experimentally demonstrated through a 20 nm thick WS2 waveguide. Notably, this study integrated the WS2 waveguide with a WSe2 monolayer to demonstrate the coupling of monolayer emission to the polariton waveguide. The results suggest that WS2 multilayers provide a novel material platform with potential for nanophotonic applications, including ultrathin optical integrated circuits.

KW - exciton–polariton waveguides

KW - transition metal dichalcogenides waveguides

KW - ultrathin waveguides

KW - WS2 multilayer

UR - http://www.scopus.com/inward/record.url?scp=85159716452&partnerID=8YFLogxK

U2 - 10.1002/adom.202300069

DO - 10.1002/adom.202300069

M3 - Article

AN - SCOPUS:85159716452

SN - 2195-1071

VL - 11

JO - Advanced Optical Materials

JF - Advanced Optical Materials

IS - 16

M1 - 2300069

ER -