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NOEKS – Invited Article

Hot carrier cooling by acoustic phonons in epitaxial graphene by ultrafast pump-probe spectroscopy

  1. Dong Sun1,
  2. Charles Divin1,
  3. Claire Berger2,
  4. Walt A. de Heer2,
  5. Phillip N. First2,
  6. Theodore B. Norris1,*

Article first published online: 18 FEB 2011

DOI: 10.1002/pssc.201001134

Issue

physica status solidi (c)

physica status solidi (c)

Special Issue: 10th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors (NOEKS 10) • International Workshop Beam Injection Assessment of Microstructures in Semicondutors (BIAMS 2010)

Volume 8, Issue 4, pages 1194–1197, April 2011

Additional Information

How to Cite

Sun, D., Divin, C., Berger, C., de Heer, W. A., First, P. N. and Norris, T. B. (2011), Hot carrier cooling by acoustic phonons in epitaxial graphene by ultrafast pump-probe spectroscopy. Phys. Status Solidi C, 8: 1194–1197. doi: 10.1002/pssc.201001134

Author Information

  1. 1

    Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Blvd., 48109 Ann Arbor, USA

  2. 2

    School of Physics, Georgia Institute of Technology, 30332 Atlanta, USA

*Phone: +001 734 764 9269, Fax: +001 734 763 4876

Publication History

  1. Issue published online: 5 APR 2011
  2. Article first published online: 18 FEB 2011
  3. Manuscript Revised: 10 JAN 2011
  4. Manuscript Accepted: 10 JAN 2011
  5. Manuscript Received: 4 OCT 2010

Funded by

  • NSF MRSEC. Grant Number: 0820382

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Keywords:

  • graphene;
  • acoustic phonons;
  • hot carrier cooling;
  • pump-probe spectroscopy

Abstract

We report the application nondegenerate ultrafast mid-infrared spectroscopy to investigate the acoustic phonon cooling process in epitaxial graphene. We show that the power-dependent experimental results match theoretical predictions of the low temperature acoustic cooling process. The hot phonon effect in acoustic phonon cooling is observed experimentally, and a deformation potential of 30 eV can be determined from fitting the data. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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