TY - JOUR
T1 - Modulation of curved graphene nanoribbon optical absorption spectra by an electric field
AU - Li, T. S.
AU - Lin, M. F.
AU - Chang, S. C.
PY - 2012/11/27
Y1 - 2012/11/27
N2 - The optical absorption spectra of curved graphene nanoribbons exhibit rich dependence on the magnitude and direction of the electric field. The wave functions have spatial symmetry originating from the equivalence of the two sublattices. There exists an optical selection rule caused by the special structure of the Hamiltonian matrix and the wave function spatial symmetry. An electric field may or may not disrupt such spatial symmetry depending on its direction and magnitude. Therefore, the optical selection rule can be controlled. In addition, the two-fold degeneracy of the optical absorption peaks is lifted by the electric field, and the variations of the absorption peak energies with the field are explored.
AB - The optical absorption spectra of curved graphene nanoribbons exhibit rich dependence on the magnitude and direction of the electric field. The wave functions have spatial symmetry originating from the equivalence of the two sublattices. There exists an optical selection rule caused by the special structure of the Hamiltonian matrix and the wave function spatial symmetry. An electric field may or may not disrupt such spatial symmetry depending on its direction and magnitude. Therefore, the optical selection rule can be controlled. In addition, the two-fold degeneracy of the optical absorption peaks is lifted by the electric field, and the variations of the absorption peak energies with the field are explored.
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U2 - 10.1080/14786435.2012.705913
DO - 10.1080/14786435.2012.705913
M3 - Article
AN - SCOPUS:84870296599
VL - 92
SP - 4376
EP - 4388
JO - Philosophical Magazine
JF - Philosophical Magazine
SN - 1478-6435
IS - 34
ER -