Third-order optical nonlinearity of multi-armed CdS nanorods measured by the Z-scan method - Tingyin Ning; Peng Gao; Wenlong Wang; Heng Lu; Wangyang Fu; Yueliang Zhou; Dongxiang Zhang; Xuedong Bai; Enge Wang; Guozhen Yang (Physica E: Low-Dimensional Systems and Nanostructures, 2009)