Demonstration of ultra-small MIR acoustic-graphene-plasmon cavities based on magnetic resonators

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 publication2D Photonic Materials and Devices IV
EditorsArka Majumdar, Carlos M. Torres, Hui Deng
ISBN (Electronic)9781510642119
StatePublished - 2021
Event2D Photonic Materials and Devices IV 2021 - Virtual, Online, United States
Duration: 6 Mar 202111 Mar 2021

Publication series

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


Conference2D Photonic Materials and Devices IV 2021
Country/TerritoryUnited States
CityVirtual, Online


  • Acoustic graphene plasmons
  • MIR cavities
  • Magnetic resonance


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