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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Series: | Light: Science & Applications |
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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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