Room temperature green light waveguide behavior of micron-sized single-crystalline ZnO rods

Green light waveguide behavior of micron-sized single-crystalline Zinc Oxide (ZnO) rods was for the first time investigated by using far-field and near-field optical systems. Micron-sized hexagonal single-crystalline ZnO rods were synthesized with a simple self-organization growth process by annealing ZnO powders in an electric muffle furnace at 1100 degrees C for 1 hour. The green fluorescence excited by ultraviolet laser may result from the impurities on the surface of ZnO rods. The optical waveguide behavior of single ZnO rods shows its potential applications to future micro-optoelectronic devices.