Ultra-thin grating coupler for guided exciton-polaritons in WS2multilayers

Hyun Hee Cho; Dong Jin Shin; Junghyun Sung; Su Hyun Gong

doi:10.1515/nanoph-2022-0791

Ultra-thin grating coupler for guided exciton-polaritons in WS₂multilayers

Hyun Hee Cho, Dong Jin Shin, Junghyun Sung, Su Hyun Gong

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

Abstract

An ultra-thin transition metal dichalcogenide (TMDC) layer can support guided exciton-polariton modes due to the strong coupling between excitons and photons. Herein, we report the guided mode resonance in an ultra-thin TMDC grating structure. Owing to the strong exciton resonances in TMDCs, a TMDC grating structure shows guided-mode resonance even at a thickness limit of ∼10 nm and is capable of realizing polaritonic dispersion in a monolithic grating structure. We investigated the polarization and thickness dependence of the optical dispersion relations of the tungsten disulfide (WS2) grating structure. In addition, we confirmed that the monolithic WS2 grating coupler can be used to couple the near-field guided exciton-polariton out into the far field. We believe that ultra-thin TMDC layers can facilitate sub-wavelength nanophotonic applications.

Original language	English
Journal	Nanophotonics
DOIs	https://doi.org/10.1515/nanoph-2022-0791
Publication status	Accepted/In press - 2023

Keywords

1D photonic crystal
exciton-polariton
grating coupler
guided mode resonance
transition metal dichalcogenide
tungsten disulfide

ASJC Scopus subject areas

Biotechnology
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.1515/nanoph-2022-0791

Cite this

@article{823c6933cf80491dbcb8ad09df82f749,

title = "Ultra-thin grating coupler for guided exciton-polaritons in WS2multilayers",

abstract = "An ultra-thin transition metal dichalcogenide (TMDC) layer can support guided exciton-polariton modes due to the strong coupling between excitons and photons. Herein, we report the guided mode resonance in an ultra-thin TMDC grating structure. Owing to the strong exciton resonances in TMDCs, a TMDC grating structure shows guided-mode resonance even at a thickness limit of ∼10 nm and is capable of realizing polaritonic dispersion in a monolithic grating structure. We investigated the polarization and thickness dependence of the optical dispersion relations of the tungsten disulfide (WS2) grating structure. In addition, we confirmed that the monolithic WS2 grating coupler can be used to couple the near-field guided exciton-polariton out into the far field. We believe that ultra-thin TMDC layers can facilitate sub-wavelength nanophotonic applications.",

keywords = "1D photonic crystal, exciton-polariton, grating coupler, guided mode resonance, transition metal dichalcogenide, tungsten disulfide",

author = "Cho, {Hyun Hee} and Shin, {Dong Jin} and Junghyun Sung and Gong, {Su Hyun}",

note = "Funding Information: Research funding: This work was supported by the National Research Foundation of Korea (NRF-2019R1A2C2003313, NRF-2022R1A4A1034315) and National R & D Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3F3A2A03017083). We acknowledge support provided by Samsung Science and Technology Foundation (SSTF-BA1902-03) and a Korea University Grant. Publisher Copyright: {\textcopyright} 2023 the author(s), published by De Gruyter, Berlin/Boston 2023.",

year = "2023",

doi = "10.1515/nanoph-2022-0791",

language = "English",

journal = "Nanophotonics",

issn = "2192-8606",

publisher = "Walter De Gruyter",

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TY - JOUR

T1 - Ultra-thin grating coupler for guided exciton-polaritons in WS2multilayers

AU - Cho, Hyun Hee

AU - Shin, Dong Jin

AU - Sung, Junghyun

AU - Gong, Su Hyun

N1 - Funding Information: Research funding: This work was supported by the National Research Foundation of Korea (NRF-2019R1A2C2003313, NRF-2022R1A4A1034315) and National R & D Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3F3A2A03017083). We acknowledge support provided by Samsung Science and Technology Foundation (SSTF-BA1902-03) and a Korea University Grant. Publisher Copyright: © 2023 the author(s), published by De Gruyter, Berlin/Boston 2023.

PY - 2023

Y1 - 2023

N2 - An ultra-thin transition metal dichalcogenide (TMDC) layer can support guided exciton-polariton modes due to the strong coupling between excitons and photons. Herein, we report the guided mode resonance in an ultra-thin TMDC grating structure. Owing to the strong exciton resonances in TMDCs, a TMDC grating structure shows guided-mode resonance even at a thickness limit of ∼10 nm and is capable of realizing polaritonic dispersion in a monolithic grating structure. We investigated the polarization and thickness dependence of the optical dispersion relations of the tungsten disulfide (WS2) grating structure. In addition, we confirmed that the monolithic WS2 grating coupler can be used to couple the near-field guided exciton-polariton out into the far field. We believe that ultra-thin TMDC layers can facilitate sub-wavelength nanophotonic applications.

AB - An ultra-thin transition metal dichalcogenide (TMDC) layer can support guided exciton-polariton modes due to the strong coupling between excitons and photons. Herein, we report the guided mode resonance in an ultra-thin TMDC grating structure. Owing to the strong exciton resonances in TMDCs, a TMDC grating structure shows guided-mode resonance even at a thickness limit of ∼10 nm and is capable of realizing polaritonic dispersion in a monolithic grating structure. We investigated the polarization and thickness dependence of the optical dispersion relations of the tungsten disulfide (WS2) grating structure. In addition, we confirmed that the monolithic WS2 grating coupler can be used to couple the near-field guided exciton-polariton out into the far field. We believe that ultra-thin TMDC layers can facilitate sub-wavelength nanophotonic applications.

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