Graphene Terahertz Modulators by Ionic Liquid Gating

Graphene Terahertz Modulators by Ionic Liquid Gating

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 performan...

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Veröffentlicht in:Advanced materials (Weinheim) 2015-03, Vol.27 (11), p.1874-1879
Hauptverfasser: Wu, Yang, La-o-vorakiat, Chan, Qiu, Xuepeng, Liu, Jingbo, Deorani, Praveen, Banerjee, Karan, Son, Jaesung, Chen, Yuanfu, Chia, Elbert E. M., Yang, Hyunsoo
Format: Artikel
Sprache:eng
Schlagworte:
Band structure of solids
Electric potential
Gating and risering
Graphene
Ionic liquids
Modulation
Modulators
optoelectronics
terahertz modulators
Voltage
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Zusammenfassung: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201405251