[1] [1] C E Ekuma, D J Singh, J Morenoet, et al.. Optical properties of PbTe and PbSe [J]. Phys Rev B, 2012, 85(8): 085205.

[2] [2] P Dey, J Paul, J Bylsma, et al.. Origin of the temperature dependence of the band gap of PbS and PbSe quantum dots [J]. Solid State Commun, 2013, 165: 49-54.

[3] [3] R D Schaller, M Sykora, J M Pietryga, et al.. Seven excitons at a cost of one: redefining the limits for conversion efficiency of photons into charge carriers [J]. Nano Lett, 2006, 6(3): 424-429.

[4] [4] H Du, C Chen, R Krishnan, et al.. Optical properties of colloidal PbSe nanocrystals[J]. Nano Lett, 2002, 2(11): 1321-1324.

[5] [5] M Brumer, M Sirota, A Kigel, et al.. Nanocrystals of PbSe core, PbSe/PbS, and PbSe/PbSexS1-x core/shell as saturable absorbers in passively Q-switched near-infrared lasers [J]. Appl Opt, 2006, 45(28): 7488-7497.

[6] [6] Cheng Cheng. A multi-quantum-dot-doped fiber amplifier with characteristics of broadband, flat gain and low noise [J]. J Lightwave Technol, 2008, 26(11): 1404-1410.

[7] [7] Cheng Cheng, Bo Jianfeng, Yan Jinhua. Experimental observation of a PbSe nanocrystal quantum dot doped fiber laser with single/multiple modes [J]. Acta Optica Sinica, 2013, 33(9): 0914001.

[8] [8] Cheng Cheng, Cheng Xiaoyu. Nanophotonics and Devices [M]. Beijing: Science Press, 2013. 64-69.

[9] [9] A Lipovskii, E Kolobkova, V Petrikov, et al.. Synthesis and characterization of PbSe quantum dots in phosphate glass [J]. Appl Phys Lett, 1997, 71(23): 3406-3408.

[10] [10] T Okuno, A A Lipovskii, T Ogawa, et al.. Strong confinement of PbSe and PbS quantum dots [J]. J Lumines, 2000, 87(89): 491-493.

[11] [11] P N Prasad. Nanophotonics [M]. New York: John Wiley and Sons, 2004. 27-38.

[12] [12] B L Wehrenberg, C Wang, P Guyot-Sionnest. Interband and intraband optical studies of PbSe colloidal quantum dots [J]. J Phys Chem B, 2002, 106(41): 10634-10640.

[13] [13] D E McCumber. Einstein relations connecting broadband emission and absorption spectra [J]. Phys Rev, 1964, 136(4A): A954-A957.