[1] [1] R Prasanth, J E M Haverkort, A Deepthy, et al.. All-optical switching due to state filling in quantum dots[J]. Appl Phys Lett, 2004, 84(20): 4059-4061.

[2] [2] P Waltner, A Materny, W Kiefer, et al.. Phonon relaxation in CdSSe semiconductor quantum dots studied by femtosecond time-resolved coherent anti-Stokes Raman scattering[J]. J Appl Phys, 2000, 88(9): 5268-5271.

[3] [3] X H Wang, Y M Du, S Ding, et al.. Preparation and third-order optical nonlinearity of self-assembled chitonsan/CdSe-ZnS core-shell quantum dots films[J]. Phys Chem B, 2006, 110(4): 1566-1570.

[4] [4] K Wang, J Zhou, L Y Yuan, et al.. Anisotropic third-order optical nonlinearity of a single ZnO micro/nanowire[J]. Nano Lett, 2012, 12(2): 833-838.

[5] [5] K Wang, H Long, M Fu, et al.. Size-related third-order optical nonlinearities of Au nanoparticle arrays[J]. Opt Express, 2010,18(13): 13874-13879.

[6] [6] Fu Ming, Wang Kai, Long Hua, et al.. Resonantly enhanced optical nonlinearity in hybrid semiconductor quantum dot-metal nanoparticle structures[J]. Appl Phys Lett, 2012, 100(6): 063117.

[7] [7] R H Xie, G W Bryant, S Lee, et al.. Electron-hole correlations and optical excitonic gaps in quantum-dot quantum wells: Tight-binding approach[J]. Phys Rev B, 2002, 65(23): 235306.

[8] [8] G W Bryant, J P Lewis, C E Jukermeier, et al.. Ab initio tight-binding analysis of CdS nanocrystals[J]. Phys Rev B, 2008, 77(20): 205125.

[9] [9] Wu Wenzhi, Zheng Zhiren, Jin Qinhan, et al.. The property of third-order optical nonlinear susceptibility of water soluble CdTe quantum dots[J]. Acta Physica Sinica, 2008, 57(2): 1177-1182.

[10] [10] Wu Feng, Tian Wei, Chen Wenju, et al.. Nonlinear optical properties of CdSe0.8 S0.2 quantum dots[J]. Journal of Modern Optics, 2009, 10(7): 1868-1873.

[11] [11] H Du, G Q Xu, W S Chin. Synthesis, characterization, and nonlinear optical properties of hybridized CdS-polystyrene nanocomposites[J]. Chem Mater, 2002, 14(10): 4473-4479.

[12] [12] F Li, P X Lu, H Long, et al.. Nonlinear absorption in CuPc-doped PMMA thin film in the femtosecond regime:Experimental and theoretical studies[J]. Opt Express, 2008, 16(19): 14571-14581.

[13] [13] H Long, A P Chen, G Yang, et al.. Nonlinear optical properties of laser deposited CuO thin films[J]. Thin Solid Films 2009, 517(15): 5601-5604.

[14] [14] J I Langford, A J C Wilson. Scherrer after sixty years: a survey and some new results in the determination of crystallite size[J]. Appl Cryst, 1978, 11(2): 102-113.

[15] [15] V I Klimov, A A Mikhailovsky, S Xu, et al.. Optical gain and stimulated emission in nanocrystal quantum dots[J]. Science, 2000, 290(5490): 314-317.

[16] [16] Y Gao, A Tonizzo, A Walser, et al.. Enhanced optical nonlinearity of surfactant-capped CdS quantum dots embedded in an optically transparent polystyrene thin film[J]. Appl Phys Lett, 2008, 92(3): 033106.

[17] [17] Xing Guichuan, Sabyasachi Chakrabortty, Kok Loong Chou, et al.. Enhanced tunability of the multiphoton absorption cross-section in seeded CdSe/CdS nanorodheterostructures[J]. Appl Phys Lett, 2010, 97(6), 061112.

[18] [18] M S Neo, N Venkatram, G S Li, et al.. Synthesis of PbS/CdS Core-Shell QDs and their nonlinear optical properties[J]. Phys Chem C, 2010, 114(42): 18037-18044.

[19] [19] Yasuo Tomita, Masa-aki Shibata, Johan Bergquist. Effects of free-carrier absorption on time-resolved pump-probe two-photon absorption in semiinsulating semiconductors[J]. Appl Phys, 1992, 72(3): 1075-1079.

[20] [20] M Sheik-Bahae, A A Said, T H Wei, et al.. Sensitive measurement of optical nonlinearities using a single beam[J]. Quantum Electron, 1990, 26(4): 760-769.

[21] [21] G P Banfi, V Degiorgio, M Ghigliazza, et al.. Two-photon absorption in semiconductor nanocrystals[J]. Phys Rev B, 1994, (50): 5699-5702.

[22] [22] D C Rogers, R J Manning, B J Ainslie, et al.. Concentration dependence of nonresonant nonlinearity in CdS/sub x/Se/sub 1-x/doped glasses[J]. Technol Lett, 1994, 6(8): 1017-1019.

[23] [23] Wang Kai, Long Hua, Ming Fu, et al.. Intensity-dependent reversal of nonlinearity sign in a gold nanoparticle array[J]. Opt Lett, 2010, 35(10): 1560-1562.

[24] [24] J He, W Ji, G H Ma, et al.. Ultrafast and large third-order nonlinear optical properties of CdS nanocystals in polymeric film[J]. Phys Chem B, 2005, 109(10): 4373-4376.

[25] [25] R Rangel-Rojo, K Kimura, H Matsuda, et al.. Dispersion of the third-order nonlinearity of metallo-organic compound[J]. Opt Commun, 2003, 228(1): 181-186.