biostudies-literatureUnknown6Lee EJActive manipulation of light in optical fibres has been extensively studied with great interest because of its compatibility with diverse fibre-optic systems. While graphene exhibits a strong electro-optic effect originating from its gapless Dirac-fermionic band structure, electric control of all-fibre graphene devices remains still highly challenging. Here we report electrically manipulable in-line graphene devices by integrating graphene-based field effect transistors on a side-polished fibre. Ion liquid used in the present work critically acts both as an efficient gating medium with wide electrochemical windows and transparent over-cladding facilitating light-matter interaction. Combined study of unique features in gate-variable electrical transport and optical transition at monolayer aNature communications6851https://www.ebi.ac.uk/biostudies/studies/S-EPMC4410643biostudies-literatureActive control of all-fibre graphene devices with electrical gating.PMC4410643Park NHSon SChoi SYJeong HYim WPark JKLee KYeom DIHong BHAhn KJLee EJPark JYRotermund FBae SKim MHKim SJAhn YHfalseActive control of all-fibre graphene devices with electrical gating.Active manipulation of light in optical fibres has been extensively studied with great interest because of its compatibility with diverse fibre-optic systems. While graphene exhibits a strong electro-optic effect originating from its gapless Dirac-fermionic band structure, electric control of all-fibre graphene devices remains still highly challenging. Here we report electrically manipulable in-line graphene devices by integrating graphene-based field effect transistors on a side-polished fibre. Ion liquid used in the present work critically acts both as an efficient gating medium with wide electrochemical windows and transparent over-cladding facilitating light-matter interaction. Combined study of unique features in gate-variable electrical transport and optical transition at monolayer a2015-01-01T00:00:00Z2015 Apr2025-04-18T17:30:28.995Z2019-03-27T01:50:33ZS-EPMC44106432589768710.1038/ncomms7851