Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots

• Main Authors: Wang, Y., Yang, X., He, T. C., Gao, Yuan, Demir, Hilmi Volkan, Sun, Xiaowei, Sun, Handong
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/96530; http://hdl.handle.net/10220/9874
• Institution: Nanyang Technological University

We have investigated the third-order optical nonlinearities of high-quality colloidal InP/ZnS core-shell quantum dots (QDs) using Z-scan technique with femtosecond pulses. The two-photon absorption cross-sections as high as 6.2 x10^3 GM are observed at 800 nm (non-resonant regime) in InP/ZnS QDs...