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Graphene nano-ribbon waveguides of recordsmall mode area and ultra-high effective refractive indices for future VLSI
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
2013 (English)In: Optics Express, ISSN 1094-4087, Vol. 21, no 25, 30664-30673 p.Article in journal (Refereed) Published
Abstract [en]

Electronics circuits keep shrinking in dimensions, as requested by Moore's law. In contrast, photonic waveguides and circuit elements still have lateral dimensions on the order of the wavelength. A key to make photonics have a microelectronics-like development is a drastic reduction of size. To achieve this, we need a low-loss nanoscale waveguide with a drastically reduced mode area and an ultra-high effective refractive index. For this purpose, we propose here several low-loss waveguide structures based on graphene nano-ribbons. An extremely small mode area (∼10-7λ0 2, one order smaller than the smallest mode area of any waveguide that has ever been reported in the literature; here λ0 is the operating wavelength in vacuum) and an extremely large effective refractive index (several hundreds) are achieved. As a device example, a nano-ring cavity of ultrasmall size (with a diameter of ∼10-2λ0) is designed. Our study paves the way for future VLSI (very-large-scale integration) optoelectronics.

Place, publisher, year, edition, pages
2013. Vol. 21, no 25, 30664-30673 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-139419DOI: 10.1364/OE.21.030664ISI: 000328575700051ScopusID: 2-s2.0-84890512529OAI: diva2:688365

QC 20140116

Available from: 2014-01-16 Created: 2014-01-13 Last updated: 2014-05-23Bibliographically approved

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He, Sailing
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