Electro-optical graphene plasmonic logic gates

The versatile control of graphene's plasmonic modes via an external gate-voltage inspires us to design efficient electro-optical graphene plasmonic logic gates at the midinfrared wavelengths. We show that these devices are superior to the conventional optical logic gates because the former poss...

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Bibliographic Details
Published in:Optics letters 2014-03, Vol.39 (6), p.1629-1632
Main Authors: Ooi, Kelvin J A, Chu, Hong Son, Bai, Ping, Ang, Lay Kee
Format: Article
Language:English
Subjects:
Devices
Electronics - instrumentation
Electrooptical
Equipment Design
Equipment Failure Analysis
Gates
Graphene
Graphite - chemistry
Graphite - radiation effects
Light
Logic
Micro-Electrical-Mechanical Systems - instrumentation
Nanostructure
Noise levels
Optical Devices
Plasmonics
Signal Processing, Computer-Assisted - instrumentation
Surface Plasmon Resonance - instrumentation
Wavelengths
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Summary:The versatile control of graphene's plasmonic modes via an external gate-voltage inspires us to design efficient electro-optical graphene plasmonic logic gates at the midinfrared wavelengths. We show that these devices are superior to the conventional optical logic gates because the former possess cut-off states and interferometric effects. Moreover, the designed six basic logic gates (i.e., NOR/AND, NAND/OR, XNOR/XOR) achieved not only ultracompact size lengths of less than λ/28 with respect to the operating wavelength of 10 μm, but also a minimum extinction ratio as high as 15 dB. These graphene plasmonic logic gates are potential building blocks for future nanoscale midinfrared photonic integrated circuits.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.001629