Please use this identifier to cite or link to this item:
|Title:||Enhanced optical dichroism of graphene nanoribbons|
|Citation:||Hipolito, F., Chaves, A.J., Ribeiro, R.M., Vasilevskiy, M.I., Pereira, V.M., Peres, N.M.R. (2012-09-19). Enhanced optical dichroism of graphene nanoribbons. Physical Review B - Condensed Matter and Materials Physics 86 (11) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.86.115430|
|Abstract:||The optical conductivity of graphene nanoribbons is analytical and exactly derived. It is shown that the absence of translational invariance along the transverse direction allows considerable intraband absorption in a narrow frequency window that varies with the ribbon width, and lies in the THz range domain for ribbons 10-100 nm wide. In this spectral region the absorption anisotropy can be as high as two orders of magnitude, which renders the medium strongly dichroic, and allows for a very high degree of polarization (up to ∼85%) with just a single layer of graphene. Using a cavity for impedance enhancement, or a stack of few layer nanoribbons, these values can reach almost 100%. This opens a potential prospect of employing graphene ribbon structures as efficient polarizers in the far IR and THz frequencies. © 2012 American Physical Society.|
|Source Title:||Physical Review B - Condensed Matter and Materials Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 15, 2019
WEB OF SCIENCETM
checked on Jan 7, 2019
checked on Dec 21, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.