Dynamic Photonic Crystal Creation by Means of Non-Coplanar Laser Beams Interference in Colloidal CdSe/ZnS Quantum Dots Solution

摘要

We demonstrated a simple way to create 1D, 2D and 3D dynamic photonic crystals with different lattice symmetry by interference of two, three or four non-coplanar laser beams in colloidal solution of CdSe/ZnS quantum dots. Dynamic photonic crystal was formed due to the periodical changing of refraction and/or absorbtion of resonantly excited electron-hole transitions (excitons) in CdSe/ZnS quantum dots. The formation of dynamic photonic crystals was confirmed by the observed diffraction of the beams that have excited photonic crystal at the angles equal to that calculated for the corresponding two-dimensional lattice (self-diffraction regime).