Graphene terahertz modulators by ionic liquid gating
Journal article published in 2015 by
Yang Wu,
Chan La-O.-Vorakiat,
Xuepeng Qiu,
Jingbo Liu,
Praveen Deorani,
Karan Banerjee,
Jaesung Son,
Yuanfu Chen,
Elbert Ee Min Chia,
Hyunsoo Yang 
This paper is available in a repository.
Full text: Download
Published version:
archiving forbidden
Data provided by 
Abstract
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.