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

doi:10.1002/adma.201505765

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

Adv Mater. 2016 Apr 20;28(15):2931-8. doi: 10.1002/adma.201505765. Epub 2016 Feb 18.

Authors

Xiaoxia Yang¹, Feng Zhai², Hai Hu¹, Debo Hu¹, Ruina Liu¹, Shunping Zhang³, Mengtao Sun⁴, Zhipei Sun⁵, Jianing Chen⁴, Qing Dai¹

Affiliations

¹ National Center for Nanoscience and Technology, Beijing, 100190, China.
² Department of Physics, Zhejiang Normal University, Jinhua, 321004, China.
³ Department of Physics, Wuhan University, Wuhan, 430072, China.
⁴ Institute of Physics, Chinese Academy of Science, and Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China.
⁵ Department of Micro- and Nanosciences, Aalto University, Tietotie 3, FI-02150, Espoo, Finland.

PMID: 26889663
DOI: 10.1002/adma.201505765

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.

Keywords: graphene; monolayer h-BN; plasmon-phonon polaritons; van der Waals heterostructures.

Publication types

Research Support, Non-U.S. Gov't