Journal Article

DESY-2014-02778

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fundamental limits and near-optimal design of graphene modulators and non-reciprocal devices

Tamagnone, M. ; Fallahi, A.DESY*>CFEL* ; Mosig, J. R. ; Perruisseau-Carrier, J. (Corresponding Author)

2014
Macmillan Publishers Limited London [u.a.]

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Please use a persistent id in citations: doi:10.1038/nphoton.2014.109

Abstract: The potential of graphene for photonic applications was evidenced by recent demonstrations of modulators, polarizationrotators and isolators. These promising yet preliminary results raise crucial questions: what is the optimal performanceachievable by more complex designs and how can this optimum be achieved in practice? We answer by first demonstratingthat the relevant figures of merit for the devices above are subject to absolute theoretical upper bounds. Strikingly, theselimits are related only to the conductivity tensor of graphene; thus, we can provide essential roadmap information such asthe best possible device performance versus wavelength and graphene quality. Second, based on the theory developed,physical insight and detailed simulations, we demonstrate how structures closely approaching these fundamental limitscan be designed, demonstrating the possibility of significant improvement. These results are believed to be of paramountimportance for the design of modulators, rotators and isolators using graphene or other two-dimensional materials.

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Contributing Institute(s):

1. Ultrafast Lasers & X-rays Division (FS-CFEL-2)

Research Program(s):

1. Experiments at CFEL (POF2-544) (POF2-544)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2014

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Database coverage:
; BIOSIS Previews ; Current Contents - Physical, Chemical and Earth Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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