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Efficient plasmonic emission by the quantum Cerenkov effect from hot carriers in graphene.


ABSTRACT: Graphene plasmons have been found to be an exciting plasmonic platform, thanks to their high field confinement and low phase velocity, motivating contemporary research to revisit established concepts in light-matter interaction. In a conceptual breakthrough over 80 years old, ?erenkov showed how charged particles emit shockwaves of light when moving faster than the phase velocity of light in a medium. To modern eyes, the ?erenkov effect offers a direct and ultrafast energy conversion scheme from charge particles to photons. The requirement for relativistic particles, however, makes ?erenkov emission inaccessible to most nanoscale electronic and photonic devices. Here we show that graphene plasmons provide the means to overcome this limitation through their low phase velocity and high field confinement. The interaction between the charge carriers flowing inside graphene and the plasmons enables a highly efficient two-dimensional ?erenkov emission, giving a versatile, tunable and ultrafast conversion mechanism from electrical signal to plasmonic excitation.

SUBMITTER: Kaminer I 

PROVIDER: S-EPMC4910017 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Efficient plasmonic emission by the quantum Čerenkov effect from hot carriers in graphene.

Kaminer Ido I   Katan Yaniv Tenenbaum YT   Buljan Hrvoje H   Shen Yichen Y   Ilic Ognjen O   López Josué J JJ   Wong Liang Jie LJ   Joannopoulos John D JD   Soljačić Marin M  

Nature communications 20160613


Graphene plasmons have been found to be an exciting plasmonic platform, thanks to their high field confinement and low phase velocity, motivating contemporary research to revisit established concepts in light-matter interaction. In a conceptual breakthrough over 80 years old, Čerenkov showed how charged particles emit shockwaves of light when moving faster than the phase velocity of light in a medium. To modern eyes, the Čerenkov effect offers a direct and ultrafast energy conversion scheme from  ...[more]

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