Our paper entitled “Distinct Roles of Mg and Li in Affecting the Electro-optic Properties of Wurtzite ZnO Thin Films” has been published in Appl. Phys. Lett. Increasing the Mg content in ZnO significantly enhances internal parameter u and reduces the anion–cation bond lengths along the c-axis direction. This facilitates Zn displacement along the c-axis direction and increases electric susceptibility, enhancing the ionic contribution to rc. As opposite to Mg, Li incorporation produces slight lattice expansion and increases anion–cation bond lengths along the c-axis orientation. Larger rc could be reached by optimizing the Mg and Li content as well as the thickness. These findings suggest the great potential of widegap ZnMgO:Li thin films for applications to EO modulation in ultraviolet band.
