Ajou University repository

Enhanced third-harmonic generation by manipulating the twist angle of bilayer grapheneoa mark
  • Ha, Seongju ;
  • Park, Nam Hun ;
  • Kim, Hyeonkyeong ;
  • Shin, Jiseon ;
  • Choi, Jungseok ;
  • Park, Sungmin ;
  • Moon, Ji Yun ;
  • Chae, Kwanbyung ;
  • Jung, Jeil ;
  • Lee, Jae Hyun ;
  • Yoo, Youngdong ;
  • Park, Ji Yong ;
  • Ahn, Kwang Jun ;
  • Yeom, Dong Il
Citations

SCOPUS

36

Citation Export

DC Field Value Language
dc.contributor.authorHa, Seongju-
dc.contributor.authorPark, Nam Hun-
dc.contributor.authorKim, Hyeonkyeong-
dc.contributor.authorShin, Jiseon-
dc.contributor.authorChoi, Jungseok-
dc.contributor.authorPark, Sungmin-
dc.contributor.authorMoon, Ji Yun-
dc.contributor.authorChae, Kwanbyung-
dc.contributor.authorJung, Jeil-
dc.contributor.authorLee, Jae Hyun-
dc.contributor.authorYoo, Youngdong-
dc.contributor.authorPark, Ji Yong-
dc.contributor.authorAhn, Kwang Jun-
dc.contributor.authorYeom, Dong Il-
dc.date.issued2021-12-01-
dc.identifier.issn2047-7538-
dc.identifier.urihttps://aurora.ajou.ac.kr/handle/2018.oak/31802-
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85099876651&origin=inward-
dc.description.abstractTwisted bilayer graphene (tBLG) has received substantial attention in various research fields due to its unconventional physical properties originating from Moiré superlattices. The electronic band structure in tBLG modified by interlayer interactions enables the emergence of low-energy van Hove singularities in the density of states, allowing the observation of intriguing features such as increased optical conductivity and photocurrent at visible or near-infrared wavelengths. Here, we show that the third-order optical nonlinearity can be considerably modified depending on the stacking angle in tBLG. The third-harmonic generation (THG) efficiency is found to significantly increase when the energy gap at the van Hove singularity matches the three-photon resonance of incident light. Further study on electrically tuneable optical nonlinearity reveals that the gate-controlled THG enhancement varies with the twist angle in tBLG, resulting in a THG enhanced up to 60 times compared to neutral monolayer graphene. Our results prove that the twist angle opens up a new way to control and increase the optical nonlinearity of tBLG, suggesting rotation-induced tuneable nonlinear optics in stacked two-dimensional material systems.-
dc.description.sponsorshipThis work was financially supported by the National Research Foundation of Korea (NRF, 2019R1A2C1006119) and Korea Institute of Energy Technology Evaluation and Planning (KETEP) (20184030202220).-
dc.language.isoeng-
dc.publisherSpringer Nature-
dc.subject.meshElectronic band structure-
dc.subject.meshInterlayer interactions-
dc.subject.meshNear-infrared wavelength-
dc.subject.meshOptical nonlinearity-
dc.subject.meshThird-order optical nonlinearities-
dc.subject.meshThree-photon resonances-
dc.subject.meshTwo-dimensional materials-
dc.subject.meshVan Hove singularities-
dc.titleEnhanced third-harmonic generation by manipulating the twist angle of bilayer graphene-
dc.typeArticle-
dc.citation.number1-
dc.citation.titleLight: Science and Applications-
dc.citation.volume10-
dc.identifier.bibliographicCitationLight: Science and Applications, Vol.10 No.1-
dc.identifier.doi10.1038/s41377-020-00459-5-
dc.identifier.scopusid2-s2.0-85099876651-
dc.identifier.urlwww.nature.com/lsa/-
dc.type.otherArticle-
dc.identifier.pissn2095-5545-
dc.description.isoatrue-
dc.subject.subareaElectronic, Optical and Magnetic Materials-
dc.subject.subareaAtomic and Molecular Physics, and Optics-
Show simple item record

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Yoo, Youngdong Image
Yoo, Youngdong유영동
Department of Chemistry
Read More

Total Views & Downloads

File Download