Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene

Nonlinear optics: When graphene ‘does the twist’ Modifying the angle between the two layers of twisted bilayer graphene can considerably improve how photons interact with it to generate higher-energy photons. Dong-Il Yeom of Ajou University and colleagues in Korea shined laser light onto twisted bil...

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Main Authors: Seongju Ha, Nam Hun Park, Hyeonkyeong Kim, Jiseon Shin, Jungseok Choi, Sungmin Park, Ji-Yun Moon, Kwanbyung Chae, Jeil Jung, Jae-Hyun Lee, Youngdong Yoo, Ji-Yong Park, Kwang Jun Ahn, Dong-Il Yeom
Format: Article
Language:English
Published: Nature Publishing Group 2021-01-01
Series:Light: Science & Applications
Online Access:https://doi.org/10.1038/s41377-020-00459-5
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spelling doaj-d955a95760b2410db370c13bdc49e1662021-01-24T12:14:20ZengNature Publishing GroupLight: Science & Applications2047-75382021-01-0110111010.1038/s41377-020-00459-5Enhanced third-harmonic generation by manipulating the twist angle of bilayer grapheneSeongju Ha0Nam Hun Park1Hyeonkyeong Kim2Jiseon Shin3Jungseok Choi4Sungmin Park5Ji-Yun Moon6Kwanbyung Chae7Jeil Jung8Jae-Hyun Lee9Youngdong Yoo10Ji-Yong Park11Kwang Jun Ahn12Dong-Il Yeom13Department of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Physics, University of SeoulDepartment of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Physics, University of SeoulDepartment of Energy Systems Research, Ajou UniversityDepartment of Chemistry, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityDepartment of Energy Systems Research, Ajou UniversityNonlinear optics: When graphene ‘does the twist’ Modifying the angle between the two layers of twisted bilayer graphene can considerably improve how photons interact with it to generate higher-energy photons. Dong-Il Yeom of Ajou University and colleagues in Korea shined laser light onto twisted bilayer graphene stacked at various angles, and measured the outcoming optical signals. Twisted bilayer graphene is made by stacking two monolayer graphenes at an angle. The interlayer interaction in this material leads to intriguing properties. The scientists found that changing the angle could enhance a nonlinear optical property, called third-harmonic generation, by 60 times compared to monolayer graphene. The team then conducted Raman measurements and modeling calculations to understand how this process occurs. They say their findings could pave the way towards novel designs for enhancing optical nonlinearity in two-dimensional stacked materials.https://doi.org/10.1038/s41377-020-00459-5
collection DOAJ
language English
format Article
sources DOAJ
author Seongju Ha
Nam Hun Park
Hyeonkyeong Kim
Jiseon Shin
Jungseok Choi
Sungmin Park
Ji-Yun Moon
Kwanbyung Chae
Jeil Jung
Jae-Hyun Lee
Youngdong Yoo
Ji-Yong Park
Kwang Jun Ahn
Dong-Il Yeom
spellingShingle Seongju Ha
Nam Hun Park
Hyeonkyeong Kim
Jiseon Shin
Jungseok Choi
Sungmin Park
Ji-Yun Moon
Kwanbyung Chae
Jeil Jung
Jae-Hyun Lee
Youngdong Yoo
Ji-Yong Park
Kwang Jun Ahn
Dong-Il Yeom
Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
Light: Science & Applications
author_facet Seongju Ha
Nam Hun Park
Hyeonkyeong Kim
Jiseon Shin
Jungseok Choi
Sungmin Park
Ji-Yun Moon
Kwanbyung Chae
Jeil Jung
Jae-Hyun Lee
Youngdong Yoo
Ji-Yong Park
Kwang Jun Ahn
Dong-Il Yeom
author_sort Seongju Ha
title Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
title_short Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
title_full Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
title_fullStr Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
title_full_unstemmed Enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
title_sort enhanced third-harmonic generation by manipulating the twist angle of bilayer graphene
publisher Nature Publishing Group
series Light: Science & Applications
issn 2047-7538
publishDate 2021-01-01
description Nonlinear optics: When graphene ‘does the twist’ Modifying the angle between the two layers of twisted bilayer graphene can considerably improve how photons interact with it to generate higher-energy photons. Dong-Il Yeom of Ajou University and colleagues in Korea shined laser light onto twisted bilayer graphene stacked at various angles, and measured the outcoming optical signals. Twisted bilayer graphene is made by stacking two monolayer graphenes at an angle. The interlayer interaction in this material leads to intriguing properties. The scientists found that changing the angle could enhance a nonlinear optical property, called third-harmonic generation, by 60 times compared to monolayer graphene. The team then conducted Raman measurements and modeling calculations to understand how this process occurs. They say their findings could pave the way towards novel designs for enhancing optical nonlinearity in two-dimensional stacked materials.
url https://doi.org/10.1038/s41377-020-00459-5
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