title: Lasing from colloidal InP/ZnS quantum dots.
abstract: 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.
authors: School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China.
authors: Shuai
authors: S
authors: Gao
authors: Chunfeng
authors: C
authors: Zhang
authors: Yanjun
authors: Y
authors: Liu
authors: Huaipeng
authors: H
authors: Su
authors: Lai
authors: L
authors: Wei
authors: Tony
authors: T
authors: Huang
authors: Nicholas
authors: N
authors: Dellas
authors: Shuzhen
authors: S
authors: Shang
authors: Suzanne E
authors: SE
authors: Mohney
authors: Jingkang
authors: J
authors: Wang
authors: Jian
authors: J
authors: Xu