Real-time observation of interlayer vibrations in bilayer and few-layer graphene

Davide Boschetto, Leandro Malard, Chun Hung Lui, Kin Fai Mak, Zhiqiang Li, Hugen Yan, Tony F. Heinz

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We report real-time observation of the interlayer shearing mode, corresponding to the lateral oscillation of graphene planes, for bi- and few-layer graphene. Using a femtosecond pump-probe technique, we have followed coherent oscillations of this vibrational mode directly in the time domain. The shearing-mode frequency, as expected for an interlayer mode, exhibits a strong and systematic dependence on the number of layers, varying from 1.32 THz for the bulk limit to 0.85 THz for bilayer graphene. We explored the role of interactions with the external environment on this vibrational mode by comparing the response observed for graphene layers supported by different substrates and suspended in free space. No significant frequency shifts were observed.

Original languageEnglish (US)
Pages (from-to)4620-4623
Number of pages4
JournalNano letters
Volume13
Issue number10
DOIs
StatePublished - Oct 18 2013

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Graphite
Graphene
interlayers
graphene
vibration
shearing
Shearing
vibration mode
lateral oscillation
frequency shift
Pumps
pumps
oscillations
probes
Substrates
interactions

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Boschetto, D., Malard, L., Lui, C. H., Mak, K. F., Li, Z., Yan, H., & Heinz, T. F. (2013). Real-time observation of interlayer vibrations in bilayer and few-layer graphene. Nano letters, 13(10), 4620-4623. https://doi.org/10.1021/nl401713h
Boschetto, Davide ; Malard, Leandro ; Lui, Chun Hung ; Mak, Kin Fai ; Li, Zhiqiang ; Yan, Hugen ; Heinz, Tony F. / Real-time observation of interlayer vibrations in bilayer and few-layer graphene. In: Nano letters. 2013 ; Vol. 13, No. 10. pp. 4620-4623.
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Boschetto, D, Malard, L, Lui, CH, Mak, KF, Li, Z, Yan, H & Heinz, TF 2013, 'Real-time observation of interlayer vibrations in bilayer and few-layer graphene', Nano letters, vol. 13, no. 10, pp. 4620-4623. https://doi.org/10.1021/nl401713h

Real-time observation of interlayer vibrations in bilayer and few-layer graphene. / Boschetto, Davide; Malard, Leandro; Lui, Chun Hung; Mak, Kin Fai; Li, Zhiqiang; Yan, Hugen; Heinz, Tony F.

In: Nano letters, Vol. 13, No. 10, 18.10.2013, p. 4620-4623.

Research output: Contribution to journalArticle

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T1 - Real-time observation of interlayer vibrations in bilayer and few-layer graphene

AU - Boschetto, Davide

AU - Malard, Leandro

AU - Lui, Chun Hung

AU - Mak, Kin Fai

AU - Li, Zhiqiang

AU - Yan, Hugen

AU - Heinz, Tony F.

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AB - We report real-time observation of the interlayer shearing mode, corresponding to the lateral oscillation of graphene planes, for bi- and few-layer graphene. Using a femtosecond pump-probe technique, we have followed coherent oscillations of this vibrational mode directly in the time domain. The shearing-mode frequency, as expected for an interlayer mode, exhibits a strong and systematic dependence on the number of layers, varying from 1.32 THz for the bulk limit to 0.85 THz for bilayer graphene. We explored the role of interactions with the external environment on this vibrational mode by comparing the response observed for graphene layers supported by different substrates and suspended in free space. No significant frequency shifts were observed.

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Boschetto D, Malard L, Lui CH, Mak KF, Li Z, Yan H et al. Real-time observation of interlayer vibrations in bilayer and few-layer graphene. Nano letters. 2013 Oct 18;13(10):4620-4623. https://doi.org/10.1021/nl401713h