[1] [1] Harel E, Rupich S M, Schaller R D. Measurement of electronic splitting in PbS quantum dots by two-dimensional nonlinear spectroscopy[J]. Physical Review B, 2012, 86(7): 075412.

[2] [2] HAREL E, RUPICH S M, SCHALLER R D. Measurement of electronic splitting in PbS quantum dots by two-dimensional nonlinear spectroscopy[J]. Physical Review B, 2012, 86(7): 075412.

[3] [3] Nie Z H, Petukhova A, Kumacheva E. Properties and emerging applications of self-assembled structures made from inorganic nanoparticles[J]. Nature Nanotech, 2010, 5(1):15-25.

[4] [4] NIE Z H, PETUKHOVA A, KUMACHEVA E. Properties and emerging applications of self-assembled structures made from inorganic nanoparticles[J]. Nature Nanotech, 2010, 5(1): 15-25.

[7] [7] ELLINGSON R J, BEARD M C, JHONSON. Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots[J]. Nano Letters, 2014, 5(5): 865-871.

[8] [8] GARLAND J C, TANNER D B. Electrical transport and optic properties of inhomogeneous media AIP conf[J]. Proc, 1978: 40.

[9] [9] DU K, MU X Y, YU D B, et al. Synthesis and non-lineary optical properties of high quality tenary CdxPb1-xSe quantum dots[J]. Infrated and Laser Engineering, 2015, 44(5): 1549-1553.

[10] [10] HE J, LIU S Y, ZHONG M Z, et al. Two-photon Absorption in ZnO/ZnS core-shell quantum dots[J]. Chinese Journal of Luminescence, 2015, 36(2): 250.

[11] [11] MA Guo-hong, SUN Wan-xin, TANG Sing-hai, et al. Size and dielectric dependence of the third-order nonlinear optical response of Au nano-crystals embedded in matrices[J]. Opt Lett, 2002, 27(12): 1043-1045.

[13] [13] WEI S, SAMPATHI J, GUO Z, et al. Nanoporous PMMA-quantum dots nanocomposite fibers toward biomedical applications[J]. Polymer, 2011, 52: 5817-5829.

[14] [14] AI Xi-cheng, FEI H Sh, YANG Y Q. Polar enhancement of the nonlinear optical properties of Fe2O3 microcrystallites[J]. J Luminescence, 1994(60):364-367.

[15] [15] AI Xi-cheng, FEI H Sh, YANG Y Q. Polar enhancement of the nonlinear optical properties of Fe2O3 microcrystallites[J]. J Luminescence, 1994(60):364-367.

[16] [16] ZHONG J S, XIANG W D, ZHAO H J. Synthesis, characterization and third-order nonlinear optical properties of copper quantum dots embedded in sodium borosilicate glass[J]. Journal of Alloys and Compounds, 2012, 537: 269.