Nanometer-scale cavities for mid-infrared light based on graphene plasmons

Itai Epstein, David Alcaraz, Zhiqin Huang, Varun Varma Pusapati, Jean Paul Hugonin, Avinash Kumar, Xander Deputy, Tymofiy Khodkov, Tatiana G. Rappoport, Jin Yong Hong, Nuno M.R. Peres, Jing Kong, David R. Smith, Frank H.L. Koppens

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Acoustic-graphene-plasmons (AGPs) are highly confined electromagnetic modes, which carry extreme momentum and low loss in the Mid-infrared (MIR) to Terahertz (THz) spectra. They are therefore enablers of extremely strong light-matter interactions at these long wavelengths. However, owing to their large momentum they are also challenging to excite and detect. Here, we demonstrate a new way to excite AGPs that are confined to nanometric-scale cavities directly from the far-field, via localized graphene-plasmon-magnetic-resonators (GPMRs). This approach enables the efficient excitation of single AGP cavities, which are able to confine MIR light to record-breaking ultra-small mode-volumes, which are over a billion times smaller than their free-space volume.

Original languageEnglish
Title of host publicationOptical Sensors 2021
EditorsFrancesco Baldini, Jiri Homola, Robert A. Lieberman
ISBN (Electronic)9781510643789
StatePublished - 2021
EventOptical Sensors 2021 - Virtual, Online, Czech Republic
Duration: 19 Apr 202123 Apr 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptical Sensors 2021
Country/TerritoryCzech Republic
CityVirtual, Online


  • Acoustic graphene plasmons
  • MIR cavities
  • Magnetic resonance


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