Two-photon absorption in ZnO/ZnS and ZnO/ZnS/Ag core-shell quantum dots,LIU Shuyu,ZHONG Mianzeng,We report on large two-photon absorption (TPA) in ZnO/ZnS and ZnO/ZnS/Ag core/shell quantum dots (QDs), determined by both Z-scan and pump-probe techniqu
The nanoparticles ZnO had been prepared on the surface of ZnS:Cu by homogeneous precipitate method. The urea was used as precipitator in the process of hydrolysis reaction. X-ray diffraction (XRD) and infrared (IR) spectra indicated that ZnO was form