Séminaire de l'Institut Fresnel

Prof. Jeong Weon WU, Director of CNRS - Ewha International Research Center,
Physics Department, Ewha Womans University, Seoul, Korea

Photonic bandgap (PBG) material and metamaterial (MM) are artificially structured materials, which can exhibit optical properties not readily observed in natural materials. Depending on the size of individual constituents when compared with the wavelength of relevant electromagnetic wave, either diffraction/interference or effective medium description is employed to describe the optical phenomena. Examples of nonlinear optical process and lasing operation will be presented in PBG. Further, Pancharatnam-Berry phase will be discussed in manipulation of angular momentum of light in holographically generated PBG. MM is an important material system, which can be designed to show optical phenomena such as Fano resonance, optical chirality, generalized Snell's law, and spin Hall effect of light associated with Berry phase. Experimental demonstration of these phenomena in MM will be presented. 

Contacts : S. Enoch, F. Fages - Entrée libre