(Português) Divulgação da relação dos candidatos e a situação de inscrição no Processo Seletivo para ingresso no PPGFSC/UFSC 2015-2
Seminário con el prof. Mikhail Igorevich Vasilevskiy – 18 de june de 2015 – 10h15min
EL PROGRAMA DE POSGRADO EN FÍSICA invita a todos para lo seminario:
GRAPHENE-BASED NANOSTRUCTURES: PLASMONICS IN THE THZ RANGE
Mikhail Igorevich Vasilevskiy
Universidade do Minho – Portugal
Resumen:
The talk will consist of two parts dedicated, respectively, to linear and non-linear optical properties of graphene in the terahertz (THz) spectral range, related to its unique electronic spectrum (gapless and linear in momentum).
In the first part, surface plasmon-polaritons (SPPs) in graphene will be discussed along with several possible ways of their coupling to propagating electromagnetic waves in the THz range, such as (i) the attenuated total reflection (ATR) method employing a prism, (ii) graphene-based gratings or graphene monolayers with modulated conductivity, (iii) a metallic stripe or a needle tip on top of the graphene layer. Potentially interesting for applications SPP effects, such as switching, modulation and polarization of THz radiation will be considered.
In the second part some effects of the optical non-linearity of the surrounding medium or of graphene itself will be considered, including mixed polariton solitons of TE type, optical bistability of a graphene layer, and lattice solitons in a multilayer stack of graphene sheets.
