Graphene Quantum Capacitors for High Frequency Tunable Analog Applications

Graphene quantum capacitors (GQC) are demonstrated to be enablers of radio-frequency (RF) functions through voltage-tuning of their capacitance. We show that GQC complements MEMS and MOSFETs in terms of performance for high frequency analog applications and tunability. We propose a CMOS compatible fabrication process and report the first experimental assessment of their performance at microwaves frequencies (up to 10 GHz), demonstrating experimental GQCs in the pF range with a tuning ratio of 1.34:1 within 1.25 V, and Q-factors up to 12 at 1 GHz. The figures of merit of graphene variable capacitors are studied in detail from 150 to 350 K. Furthermore, we describe a systematic, graphene specific approach to optimize their performance and predict the figures of merit achieved if such a methodology is applied.


Published in:
Nano Letters, 16, 8, 4746-4753
Year:
2016
Publisher:
Washington, American Chemical Society
ISSN:
1530-6992
Keywords:
Laboratories:




 Record created 2016-10-17, last modified 2018-03-18


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