Title
Plasmonic Resonance Absorption Spectra In Mid-Infrared In An Array Of Graphene Nanoresonators
Keywords
Graphene plasmonics; mid-infrared; resonant absorption
Abstract
We experimentally demonstrated graphene plasmon resonant absorption in mid-IR by utilizing an array of graphene nanoribbon resonators on SiO2 substrate. By tuning resonator width we probed the graphene plasmons with λp ≤ λ0/100 and plasmon resonances as high as 0.240 eV (2100 cm-1) for 40 nm wide nanoresonators. Resonant absorption spectra revealed plasmon dispersion as well as plasmon damping due to the interaction of graphene plasmons with the surface polar phonons in SiO 2 substrate and intrinsic graphene optical phonons. Graphene nanoribbons with varying widths enabled us to identify the damping mechanisms of graphene plasmons and much reduced damping was observed when the plasmon resonance frequencies were close to the substrate polar phonon frequencies. Then, by direct ebeam exposure of graphene nanoresonators, we effectively changed the carrier density and caused red-shift of the plasmon spectra. This work will provide insight into light-sensitive, frequency-Tunable photodetectors based on graphene's plasmonic excitations.. © 2014 SPIE.
Publication Date
1-1-2014
Publication Title
Proceedings of SPIE - The International Society for Optical Engineering
Volume
8993
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1117/12.2045723
Copyright Status
Unknown
Socpus ID
84897445247 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84897445247
STARS Citation
Abeysinghe, Don C.; Myers, Joshua; Nader Esfahani, Nima; Hendrickson, Joshua R.; and Cleary, Justin W., "Plasmonic Resonance Absorption Spectra In Mid-Infrared In An Array Of Graphene Nanoresonators" (2014). Scopus Export 2010-2014. 9890.
https://stars.library.ucf.edu/scopus2010/9890