Chinese Journal of Quantum Electronics, Volume. 37, Issue 2, 138(2020)

Modulation of coupling between grapheneplasmon and substrate′s phonon by changing dielectric environment

Kai ZENG1,*... Xiaodong FAN1, Dongli WANG1, Xiaoguang LI2 and Changgan ZENG1 |Show fewer author(s)
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • show less

    Graphene plasmons have tremendous potential applications in middle-infrared to terahertz frequencies. Previous studies mainly focused on the coupling between graphene plasmon and phonon of substrate, while the approach to modulate such coupling has been rarely reported. One possible approach to modulate such coupling is to change the dielectric environment around graphene nanoribbons (GNRs). Numerical simulation indicates that compared with GNRs on flat SiO2 substrate, GNRs in grooves demonstrate stronger coupling between plasmon and phonon. In addition, the dispersion curve of plasmons shifts down when the frequency is away from the frequency of phonon, and the maximum absorption of the two dispersion curve branches at low frequency is also significantly improved. On the contrary, GNRs on the SiO2 protruding platform lead to contrary results. Such observations reveal that the coupling between graphene plasmon and phonon of substrate can be efficiently modulated by simply changing the edge dielectric environment of GNRs.

    Tools

    Get Citation

    Copy Citation Text

    ZENG Kai, FAN Xiaodong, WANG Dongli, LI Xiaoguang, ZENG Changgan. Modulation of coupling between grapheneplasmon and substrate′s phonon by changing dielectric environment[J]. Chinese Journal of Quantum Electronics, 2020, 37(2): 138

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Apr. 4, 2019

    Accepted: --

    Published Online: Apr. 3, 2020

    The Author Email: Kai ZENG (zengkai@mail.ustc.edu.cn)

    DOI:10.3969/j.issn.1007-5461. 2020.02.002

    Topics