skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on August 14, 2018

Title: Imaging the Localized Plasmon Resonance Modes in Graphene Nanoribbons

Here, we report a nanoinfrared (IR) imaging study of the localized plasmon resonance modes of graphene nanoribbons (GNRs) using a scattering-type scanning near-field optical microscope (s-SNOM). By comparing the imaging data of GNRs that are aligned parallel and perpendicular to the in-plane component of the excitation laser field, we observed symmetric and asymmetric plasmonic interference fringes, respectively. Theoretical analysis indicates that the asymmetric fringes are formed due to the interplay between the localized surface plasmon resonance (SPR) mode excited by the GNRs and the propagative surface plasmon polariton (SPP) mode launched by the s-SNOM tip. And with rigorous simulations, we reproduce the observed fringe patterns and address quantitatively the role of the s-SNOM tip on both the SPR and SPP modes. Moreover, we have seen real-space signatures of both the dipole and higher-order SPR modes by varying the ribbon width.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [1] ;  [2] ; ORCiD logo [3] ;  [3] ;  [3] ;  [4] ;  [3] ;  [5]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  2. Univ. of California, San Diego, CA (United States). Dept. of Physics; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of California, San Diego, CA (United States). Dept. of Physics
  4. Delft Univ. of Technology (Netherlands). Dept. of Precision and Microsystems Engineering
  5. Univ. of California, San Diego, CA (United States). Dept. of Physics; Columbia Univ., New York, NY (United States). Dept. of Physics
Publication Date:
Report Number(s):
IS-J-9416
Journal ID: ISSN 1530-6984
Grant/Contract Number:
AC02-07CH11358; GBMF4533
Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 17; Journal Issue: 9; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; aymmetric fringes; graphene nanoribbons; s-SNOM; surface plasmon polariton; surface plasmon resonance
OSTI Identifier:
1394811