Lasing from colloidal InP/ZnS quantum dots

Shuai Gao, Chunfeng Zhang, Yanjun Liu, Huaipeng Su, Lai Wei, Tony Huang, Nicholas Dellas, Shuzhen Shang, Suzanne E. Mohney, Jingkang Wang, Jian Xu

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


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 polymerdispersed liquid crystal gratings, leading to the very first demonstration of an optically-pumped, nanocrystal laser based on InP/ZnS core-shell NQDs.

Original languageEnglish (US)
Pages (from-to)5528-5535
Number of pages8
JournalOptics Express
Issue number6
StatePublished - Mar 14 2011

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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