A facile approach to hetero-nanorods of Ag2Se–MSe (M = Cd, Zn) with enhanced third-order optical nonlinearity

阅读量：

作者：

Z Huang，M Li，D Jia，P Zhong，F Tian，Z Chen，MG Humphrey，C Zhang

展开

摘要：

Semiconductor–semiconductor hetero-nanorods (Ag2Se–CdSe and Ag2Se–ZnSe) with high crystallinity have been synthesized by a facile and low-cost method. High resolution transmission electron microscopy investigations reveal that the growth follows a catalyst-assisted mechanism. A preliminary investigation of nonlinear optical properties shows that the hetero-nanorods exhibit significantly enhanced third-order nonlinear optical properties. The free carrier absorption cross-section of Ag2Se–CdSe hetero-nanorods is one order of magnitude higher than that of the corresponding single component CdSe nanocrystals. The results obtained in this study represent a new approach to the design and construction of metal selenide hetero-nanorods with high crystallinity and enhanced nonlinear optical capabilities.

展开

关键词：

Experimental/ cadmium compounds catalysis II-VI semiconductors nanofabrication nanophotonics nanorods nonlinear optical susceptibility optical materials photoluminescence semiconductor growth silver compounds transmission electron microscopy wide band gap semiconductors zinc compounds/ free carrier absorption cross-section nonlinear optical properties catalyst-assisted mechanism high-resolution transmission electron microscopy crystallinity semiconductor-semiconductor hetero-nanorods third-order optical nonlinearity Ag 2Se-CdSe Ag 2Se-ZnSe / A4265 Nonlinear optics A8116 Methods of nanofabrication and processing A6865 Low-dimensional structures: growth, structure and nonelectronic properties A4284 Nanophotonic devices and technology A4270Y Other optical materials A7855H Photoluminescence in other inorganic materials A8265J Heterogeneous catalysis at surfaces and other surface reactions B4340 Nonlinear optics and devices B2520D II-VI and III-V semiconductors B4146 Nanophotonic devices and