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Subgap optical conductivity in semihydrogenated graphene
Faculty of Engineering - Papers (Archive)
  • Yee Sin Ang
  • Chao Zhang, University of Wollongong
Publication Date
Publication Details

Ang, Y. & Zhang, C. (2011). Subgap optical conductivity in semihydrogenated graphene. Applied Physics Letters, 98 (4), 1-3.

We report that for graphene with a finite band gap (such as semihydrogenated graphene or graphene with spin-orbit coupling), there exists a strong nonlinear optical response for energies lower than the band gap where the linear response is forbidden. At low temperatures, the nonlinear current in graphene with a gap is much stronger than that in gapless graphene. Our result suggests that semihydrogenated graphene can have a unique potential as a two-color nonlinear material in the terahertz frequency region. The relative intensity of the two colors can be tuned with the electric field.
Citation Information
Yee Sin Ang and Chao Zhang. "Subgap optical conductivity in semihydrogenated graphene" (2011)
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