Details

Autor(en) / Beteiligte

• Yu ZHANG
• Xin Wang
• Ming MA
• De Gang FU
• Ning GU
• Ju Zheng LIU
• Zu Hong LU
• LING Xu
• Jun XU
• Kun Ji CHEN

Titel

Size Dependence of First-order Hyperpolarizability of CdS Nanoparticles Studied by Hyper-Rayleigh Scattering

Ist Teil von

• 中国化学快报(英文版), 2003-09, Vol.14 (9), p.948-951

Ort / Verlag

National Laboratory of Molecular and Biomolecular Electronics, Southeast University, Nanjing 210096%National Laboratory of Molecular and Biomolecular Electronics, Southeast University, Nanjing 210096%National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093

Erscheinungsjahr

2003

Link zum Volltext

Beschreibungen/Notizen

• O6; The second-order optical nonlinearity of CdS nanoparticles with different diameters of28.0, 30.0, 31.5, 50.0, and 91.0 3 was studied by hyper-Rayleigh scattering technique. Resultsshow that the first-order hyperpolarizability β value per CdS particle decreases as size is reduced todiameter of 31.5 A; however, as CdS size further decreases, this trend is reversed and β valueincreases. Substantially, the normalized β value per CdS formula unit, β0, exhibits systematicenhancement with decreasing size. This phenomenon is interpreted in terms of a so-calledsurface contribution mechanism.