title: Confinement of pyridinium hemicyanine dye within an anionic metal-organic framework for two-photon-pumped lasing.
abstract: Two-photon-pumped dye lasers are very important because of their applications in wavelength up-conversion, optical data storage, biological imaging and photodynamic therapy. Such lasers are very difficult to realize in the solid state because of the aggregation-caused quenching. Here we demonstrate a new two-photon-pumped micro-laser by encapsulating the cationic pyridinium hemicyanine dye into an anionic metal-organic framework (MOF). The resultant MOF [symbol: see text] dye composite exhibits significant two-photon fluorescence because of the large absorption cross-section and the encapsulation-enhanced luminescent efficiency of the dye. Furthermore, the well-faceted MOF crystal serves as a natural Fabry-Perot resonance cavity, leading to lasing around 640 nm when pumped with a 1064-nm pulse laser. This strategy not only combines the crystalline benefit of MOFs and luminescent behaviour of organic dyes but also creates a new synergistic two-photon-pumped lasing functionality, opening a new avenue for the future creation of solid-state photonic materials and devices.
authors.affiliation: 1] State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China [2].
authors.forename: Jiancan
authors.initials: J
authors.lastname: Yu
authors.forename: Yuanjing
authors.initials: Y
authors.lastname: Cui
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Wang
authors.forename: Banglin
authors.initials: B
authors.lastname: Chen
authors.forename: Guodong
authors.initials: G
authors.lastname: Qian
mesh_terms: D000042:Absorption; D002232:Carbocyanines / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D003460:Crystallization; D005453:Fluorescence; D007834:Lasers; D008027:Light; D049449:Luminescence; D008670:Metals / Q000737:chemistry; D018613:Microscopy, Confocal; D008856:Microscopy, Fluorescence; D055095:Optics and Photonics; D010778:Photochemotherapy; D017785:Photons; D011725:Pyridines / Q000737:chemistry*
chemical_list: D002232:Carbocyanines; D004396:Coloring Agents; D008670:Metals; D011725:Pyridines; C000657:cyanine dye 1