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Graphene Terahertz Modulators by Ionic Liquid Gating
Author(s) -
Wu Yang,
Laovorakiat Chan,
Qiu Xuepeng,
Liu Jingbo,
Deorani Praveen,
Banerjee Karan,
Son Jaesung,
Chen Yuanfu,
Chia Elbert E. M.,
Yang Hyunsoo
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201405251
Subject(s) - graphene , terahertz radiation , materials science , ionic liquid , gating , modulation (music) , broadband , optoelectronics , nanotechnology , computer science , telecommunications , physics , chemistry , physiology , biochemistry , biology , catalysis , acoustics
Excellent‐performance terahertz (THz) modulators based on graphene/ionic liquid/graphene sandwich structures are demonstrated. The modulation covers a broadband frequency range from 0.1 to 2.5 THz with a modulation depth of up to 99% by applying a small gate voltage of 3 V. The outstanding performance of the proposed devices is due to the conical band structure of the graphene and the powerful gating effect of the ionic liquid in proximity to the graphene.