Topic：From chiral to superchiral optical effects, destroying samples on the way
Speaker：Dr. Ventsislav Kolev Valev, University of Bath
Location：化学B楼410A会议室
Time：2016年8月12日上午10:00
Inviter：车顺爱 教授


Abstract：

The development of nanophotonics, nanoelectronics and nanomagnetics could result in new generations of devices, capable to store and process information at increasing speed and decreasing energy cost. 

However, the relationship between these three nanotechnologies is only beginning to be clarified. The influence of magnetic fields on surface plasmons combines aspects of photonics, electronics and magnetics at the nano scale. Surface plasmons are collective excitations of electrons under the influence of light\'s electromagnetic field and, in magnetic materials, these electrons can experience the effects of externally applied magnetic fields as well. 

This seminar will illustrate the interplay between photons, electrons and magnetism in optical metamaterials, the fundamental relationship between chirality and light.

Bio：

Ventsislav Valev graduated from Université de Bretagne Occidentale, Brest, France in 2000 with BS in Physics. He obtained MS in Physics from  University of Wales, Cardiff, United Kingdom. Then he spent 5 years at  Radboud University, Nijmegen, the Netherlands for Junior scientist working and total 6 years for postdoctoral trainings at  the Institute for Nanoscale Physics and Chemistry (INPAC) and he KU Leuven University, respectively. After working in the University of Cambridge, United Kingdom for 2 years, he moved to  the University of Bath, United Kingdom in advanced nanoscale confinment properties in metamaterials. 

His research focuses on the interaction between powerful laser light and nanostructured materials. In particular, he explore the application of chiral plasmonic nano/meta-materials to achieve enhanced chiroptical effects with potential benefits for the pharmaceutical industry. Powerful lasers constitute highly sensitive probes for material properties at the nanoscale, especially through nonlinear optical effect, such as Second Harmonic Generation. But just as light can be used to study nanomaterials, it can also be used to build them. They have thus demonstrated the world\'s smallest nanojets and have shown how light could be employed as a tiny needle threading gold strings through chains of nanoparticles.