Gao Shuai, Zhang Chunfeng, Liu Yanjun, Su Huaipeng, Wei Lai, Huang Tony, Dellas Nicholas, Shang Shuzhen, Mohney Suzanne E, Wang Jingkang, Xu Jian
School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China.
Opt Express. 2011 Mar 14;19(6):5528-35. doi: 10.1364/OE.19.005528.
High-quality InP/ZnS core-shell nanocrystal quantum dots (NQDs) were synthesized as a heavy-metal-free alternative to the gain media of cadmium-based colloidal nanoparticles. Upon UV excitation, amplified spontaneous emission (ASE) and optical gain were observed, for the first time, in close-packed InP/ZnS core-shell NQDs. The ASE wavelength can be selected by tailoring the nanocrystal size over a broad range of the spectrum. Moreover, the optical gain profile of InP/ZnS NQDs was matched to the second order feedback of holographic polymer-dispersed liquid crystal gratings, leading to the very first demonstration of an optically-pumped, nanocrystal laser based on InP/ZnS core-shell NQDs.
高质量的磷化铟/硫化锌核壳纳米晶体量子点（NQDs）被合成出来，作为镉基胶体纳米颗粒增益介质的无重金属替代物。在紫外激发下，首次在紧密堆积的磷化铟/硫化锌核壳NQDs中观察到放大自发辐射（ASE）和光学增益。通过在很宽的光谱范围内调整纳米晶体尺寸，可以选择ASE波长。此外，磷化铟/硫化锌NQDs的光学增益谱与全息聚合物分散液晶光栅的二阶反馈相匹配，从而首次实现了基于磷化铟/硫化锌核壳NQDs的光泵浦纳米晶体激光器。
