Efficient plasmonic emission by the quantum Č erenkov effect from hot carriers in graphene

Ido Kaminer, Yaniv Tenenbaum Katan, Hrvoje Buljan, Yichen Shen, Ognjen Ilic, Josue J. Lopez, Liang Jie Wong, John D. Joannopoulos, Marin Soljacic

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

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, Č 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 Č erenkov effect offers a direct and ultrafast energy conversion scheme from charge particles to photons. The requirement for relativistic particles, however, makes Č 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 Č erenkov emission, giving a versatile, tunable and ultrafast conversion mechanism from electrical signal to plasmonic excitation.

Original languageEnglish (US)
Article numberncomms11880
JournalNature communications
Volume7
DOIs
StatePublished - Jun 13 2016
Externally publishedYes

Bibliographical note

Funding Information:
The work was supported by the US Army Research Laboratory and the US Army Research Office through the Institute for Soldier Nanotechnologies (contract number W911NF-13-D-0001). H.B. acknowledges support from the QuantiXLie and G2D Center of Excellence. The research of L.J.W. was supported by the Science and Engineering Research Council (SERC; grant number 1426500054) of the Agency for Science, Technology and Research (ASTAR), Singapore. J.J.L. was supported in part by the MRSEC Program of the National Science Foundation under award number DMR-1419807. The research of I.K. was partially supported by the Seventh Framework Programme of the European Research Council (FP7-Marie Curie IOF) under grant agreement number 328853-MC-BSiCS

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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