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Broadband, electrically tuneable, third harmonic generation in graphene

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Wang, G 
Rostami, H 
Purdie, D 
Fazio, D De 

Abstract

Optical harmonic generation occurs when high intensity light (>1010W/m2) interacts with a nonlinear material. Electrical control of the nonlinear optical response enables applications such as gate-tunable switches and frequency converters. Graphene displays exceptionally strong-light matter interaction and electrically and broadband tunable third order nonlinear susceptibility. Here we show that the third harmonic generation efficiency in graphene can be tuned by over two orders of magnitude by controlling the Fermi energy and the incident photon energy. This is due to logarithmic resonances in the imaginary part of the nonlinear conductivity arising from multi-photon transitions. Thanks to the linear dispersion of the massless Dirac fermions, ultrabroadband electrical tunability can be achieved, paving the way to electrically-tuneable broadband frequency converters for applications in optical communications and signal processing.

Description

Keywords

cond-mat.mes-hall, cond-mat.mes-hall, cond-mat.mtrl-sci, physics.app-ph

Journal Title

Nature Nanotechnology

Conference Name

Journal ISSN

1748-3395
1748-3395

Volume Title

13

Publisher

Springer Nature
Sponsorship
Engineering and Physical Sciences Research Council (EP/G030480/1)
Engineering and Physical Sciences Research Council (EP/G042357/1)
Royal Society (TG102524)
Engineering and Physical Sciences Research Council (EP/K01711X/1)
Engineering and Physical Sciences Research Council (EP/K017144/1)
European Commission (604391)
Engineering and Physical Sciences Research Council (EP/L016087/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
EPSRC (via University of Manchester) (R119256)
The Royal Society (uf072943)
The Royal Society (wm090070)
Royal Society (516002K5698/kk)
European Commission (246026)
European Research Council (319277)
EPSRC (1804146)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (785219)