Scalable and Tunable Periodic Graphene Nanohole Arrays for Mid-Infrared Plasmonics

Kavitha K. Gopalan, Bruno Paulillo, David M. A. Mackenzie, Daniel Rodrigo, Nestor Bareza, Patrick R. Whelan, Abhay Shivayogimath, Valerio Pruneri*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Despite its great potential for a wide variety of devices, especially mid-infrared biosensors and photodetectors, graphene plasmonics is still confined to academic research. A major reason is the fact that, so far, expensive and low-throughput lithography techniques are needed to fabricate graphene nanostructures. Here, we report for the first time a detailed experimental study on electrostatically tunable graphene nanohole array surfaces with periods down to 100 nm, showing clear plasmonic response in the range similar to 1300-1600 cm-1, which can be fabricated by a scalable nanoimprint technique. Such large area plasmonic nanostructures are suitable for industrial applications, for example, surface-enhanced infrared absorption (SEIRA) sensing, as they combine easy design, extreme field confinement, and the possibility to excite multiple plasmon modes enabling multiband sensing, a feature not readily available in nanoribbons or other localized resonant structures.
Original languageEnglish
JournalNano letters
Volume18
Issue number9
Pages (from-to)5913-5918
ISSN1530-6984
DOIs
Publication statusPublished - 2018

Keywords

  • Graphene plasmonics
  • Plasmonic crystals
  • SEIRA
  • Large-scale nanopatterning
  • Nanoimprint lithography

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