K.R. Asanov - Master Student, Department «Radiotechnique and Electrodynamics», Saratov State University named after N.G. Chernyshevsky O.E. Glukhova - Dr.Sc. (Phys.-Math.), Professor, Head of Department «Radiotechnique and Electrodynamics», Saratov State University named after N.G. Chernyshevsky E-mail: graphene@yandex.ru

The paper is devoted to the theoretical study of the electronic and optical properties of armchair graphene nanoribbons. As the research tools, we used the software products KVAZAR and MIZAR. One of the problems, which we solved in this paper, was to identify the laws of change in optical properties of graphene nanoribbons with increasing the width. To solve this problem we considered ribbons of different width with step of change equal to 0,246 nm and 4,92 nm. In the result of the calculations, it was revealed that the optical properties of armchair graphene nanoribbons are reduced with increasing the width. The type of nanoribbon electronic conduction is also changed. It was shown that the nanoribbon of 0,492 nm in width has maximum optical conductive at the frequency of 1585 THz (6,55 eV). It is assumed that this nanoribbon can be used at designing optical antennas of UV-range.

 

1. Lebedev A.A., Lebedev S.P., Novikov S.N., Davydov V.Yu., Smirnov A.N., Litvin D.P., Makarov Yu.N., Levitskii V.S. Supersensitive graphene-based gas sensor // Technical Physics. 2016. V. 61. № 3. P. 453-457.
2. Eletskii A.V., Iskandarova I.M., Knizhnik A.A., Krasikov D.N. Graphene: fabrication methods and thermophysical properties // Physics-Uspekhi. 2011. V. 54. № 3. P. 227-258.
3. Perreault F., de Faria A.F., Elimelech M. Environmental applications of graphene-based nanomaterials // Chem. Soc. Rev. 2015. V. 44. P. 5861-5896.
4. Higgins D., Zamani P., Yu A., Chen Z. The application of graphene and its composites in oxygen reduction electrocatalysis: a perspective and review of recent progress // Energy Environ. Sci. 2016. V. 9. P. 357-390.
5. Chee W.K., Lim H.N., Zainal Z., Huang N.M., Harrison I., Andou Y. Flexible graphene-based supercapacitors: a review // J. Phys. Chem. C. 2016. V. 120. № 8. P. 4153-4172.
6. Bal R., Marwaha A. Investigation of graphene based miniaturized terahertz antenna for novel substrate materials // Engineering science and technology, an international journal. 2016. V. 19. № 1. P. 531-537.
7. Falkovsky L.A. Optical properties of graphene and IV-VI semiconductors // Physics-Uspekhi. 2008. V. 51. № 9. P. 887-898.
8. Aradi B., Horahine B., Frauenheim Th. DFTB+, a spanse matrix-based implementation of the DFTB method // J. Phys. Chem. A. 2007. V. 111. P. 5578-5684.
9. Yen T.W., Lai S.K. Use of density functional theory method to calculate structures of neutral carbon clusters Cn (3 ≤ n ≤ 24) and study their variability of structural forms // J. Chem. Phys. 2015. V. 142. P. 084313-1?13.
10. Marder M.P. Condensed Matter Physics. New Jersey. Wiley. 2011.
11. Glukhova Research Group. URL: http://nanokvazar.ru (data obrashhenija 21.03.2016)
12. Sorokin P.B., Chernozatonskii L.A. Graphene-based semiconductor nanostructures // Physics-Uspekhi. 2013. V. 56. № 2. P. 105-122.