Nanomaterials (Nov 2022)

Indefinite Graphene Nanocavities with Ultra-Compressed Mode Volumes

  • Chunchao Wen,
  • Zongyang Wang,
  • Jipeng Xu,
  • Wei Xu,
  • Wei Liu,
  • Zhihong Zhu,
  • Jianfa Zhang,
  • Shiqiao Qin

DOI
https://doi.org/10.3390/nano12224004
Journal volume & issue
Vol. 12, no. 22
p. 4004

Abstract

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Explorations of indefinite nanocavities have attracted surging interest in the past few years as such cavities enable light confinement to exceptionally small dimensions, relying on the hyperbolic dispersion of their consisting medium. Here, we propose and study indefinite graphene nanocavities, which support ultra-compressed mode volumes with confinement factors up to 109. Moreover, the nanocavities we propose manifest anomalous scaling laws of resonances and can be effectively excited from the far field. The indefinite graphene cavities, based on low dimensional materials, present a novel rout to squeeze light down to the nanoscale, rendering a more versatile platform for investigations into ultra-strong light–matter interactions at mid-infrared to terahertz spectral ranges.

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