Optical properties of armchair Graphene nanoribbons under strain
Paper ID : 1193-ICNS
Authors:
Seyed Ahmad Ketabi *, Maryam Shahrezaei
School of Physics, Damghan University, Damghan, Iran
Abstract:
In this paper, using the Tight-Binding approximation (TB), the influence of uniaxial strain is studied on the band structure and optical properties of Graphene nanoribbons with armchair edges (AGNRs). Furthermore, with the dielectric function of the system, we obtain the imaginary part of the dielectric function, absorption and reflectance coefficients of the nanoribbons. Our results indicate that the presence of the uniaxial strain induces the increase of the energy band gap in the band structure of the Graphene nanoribbons. We found, under the uniaxial strain, the optical absorption of AGNRs increases.It should be noted that the absorption coefficient and other optical coefficients affected by the variation of nanoribbon width. Our results show, the increasing of the nanoribbon width causes the wider ranges for the incident photons and also the absorption edge inclined toward the zero energy similar to the case of zigzag Graphene nanoribbons with 8 Benzene rings in width.
Keywords:
Armchair Graphene nanoribbon; Optical properties; Dielectric function
Status : Abstract Accepted (Poster Presentation)