Far-Field Spectroscopy and Near-Field Optical Imaging of Coupled Plasmon-Phonon Polaritons in 2D van der Waals Heterostructures

Xiaoxia Yang, Feng Zhai, Hai Hu, Debo Hu, Ruina Liu, Shunping Zhang, Mengtao Sun, Zhipei Sun*, Jianing Chen, Qing Dai

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

51 Citations (Scopus)

Abstract

A new hybridized plasmon-phonon polariton mode in graphene/h-BN van der Waals heterostructures is presented, featuring the ultrahigh field confinement characteristic of the graphene plasmon and the long lifetime property of the h-BN transverse optical phonon. This enables an ultralong hybrid plasmon lifetime of up to 1.6 ps (with ultrahigh mode confinement up to >l0 2/7000 and ultrasmall group velocity down to 0.001c, where c is the speed of light in vacuum), superior to any localized plasmon ever demonstrated.

Original languageEnglish
Pages (from-to)2931–2938
Number of pages8
JournalAdvanced Materials
Volume28
Issue number15
DOIs
Publication statusPublished - 10 Apr 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Graphene
  • Monolayer h-BN
  • Plasmon-phonon polaritons
  • Van der Waals heterostructures

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