The nonlinear susceptibility is a measure of a material's nonlinear response to an applied electric field. It determines the strength of the nonlinear effects and is related to the crystal's symmetry ...

This study comes from Prof. Duanduan Wan and Prof. Meng Xiao group at the School of Physics of Wuhan University. This work provides a simple while intuitive example by demonstrating with both theory ...

Topological photonics promises robust light transport immune to disorder, but existing linear systems are essentially static ...