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Effects of host and shape on nonlinear optical properties of CdS nanorods and nanoparticles

Effects of host and particle shape on the third order optical nonlinearities of CdS nanorods and CdS nanoparticles were investigated by using Z-scan technique with nanosecond pulses at 532 nm. The experimental results show that the third order optical nonlinearity of CdS nanorods/N, N-dimethyllformaide(DMF) suspension is greater than that of CdS nanoparticles. Experimental results show that CdS nanoparticles/water suspension exhibits greater third order nonlinear optical nonlinearity than CdS nanoparticles/DMF suspension. These indicate that the third order nonlinear optical performances strongly depend on the shape and host of the CdS nanomaterials as described by the Maxwell-Garnett Effective Medium Theory (MGT).