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Enhanced optical conductivity of bilayer graphene nanoribbons in the terahertz regime

Journal Article


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Abstract


  • We reveal that there exists a class of graphene structures (a

    sub-class of bilayer graphene nanoribbons) which has an

    exceptionally strong optical response in the terahertz (THz) and

    far infrared (FIR) regime. The peak conductance of THz/FIR active

    bilayer ribbons is around two orders of magnitude higher than the

    universal conductance of $\sigma_0=e^2/4\hbar$ observed in

    graphene sheets. The criterion for the THz/FIR active sub-class is

    a bilayer graphene nanoribbon with a one-dimensional massless

    Dirac Fermion energy dispersion near the $\Gamma$ point. Our

    results overcome a significant obstacle that hinders potential

    application of graphene in electronics and photonics.

Authors


  •   Wright, A R. (external author)
  •   Cao, Juncheng (external author)
  •   Chao Zhang

Publication Date


  • 2009

Citation


  • Wright, A. R., Cao, J. & Zhang, C. (2009). Enhanced optical conductivity of bilayer graphene nanoribbons in the terahertz regime. Physical Review Letters, 103 (20), 207401-1-207401-4.

Scopus Eid


  • 2-s2.0-70449347866

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1538&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/519

Start Page


  • 207401-1

End Page


  • 207401-4

Volume


  • 103

Issue


  • 20

Abstract


  • We reveal that there exists a class of graphene structures (a

    sub-class of bilayer graphene nanoribbons) which has an

    exceptionally strong optical response in the terahertz (THz) and

    far infrared (FIR) regime. The peak conductance of THz/FIR active

    bilayer ribbons is around two orders of magnitude higher than the

    universal conductance of $\sigma_0=e^2/4\hbar$ observed in

    graphene sheets. The criterion for the THz/FIR active sub-class is

    a bilayer graphene nanoribbon with a one-dimensional massless

    Dirac Fermion energy dispersion near the $\Gamma$ point. Our

    results overcome a significant obstacle that hinders potential

    application of graphene in electronics and photonics.

Authors


  •   Wright, A R. (external author)
  •   Cao, Juncheng (external author)
  •   Chao Zhang

Publication Date


  • 2009

Citation


  • Wright, A. R., Cao, J. & Zhang, C. (2009). Enhanced optical conductivity of bilayer graphene nanoribbons in the terahertz regime. Physical Review Letters, 103 (20), 207401-1-207401-4.

Scopus Eid


  • 2-s2.0-70449347866

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1538&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/519

Start Page


  • 207401-1

End Page


  • 207401-4

Volume


  • 103

Issue


  • 20