title: Broadband near-infrared emission in Tm3+-Dy3+ codoped amorphous chalcohalide films fabricated by pulsed laser deposition.
abstract: Structural and near-infrared (NIR) emission properties were investigated in the Tm(3+)-Dy(3+) codoped Ge-Ga-based amorphous chalcohalide films fabricated by pulsed laser deposition. The homogeneous films illustrated similar random network to the glass target according to the measurements of X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. An 808 nm laser diode pumping generated a superbroadband NIR emission ranging from 1050 to 1570 nm and the other intense broadband NIR emission centered at ~1800 nm, which was attributed to the efficient energy transfer from Tm(3+) to Dy(3+) ions. This was further verified by the broad-range excitation measurements near the Urbach optical-absorption edge involved defect states. The results shed light on the potential highly integrated planar optical device applications of the codoped amorphous chalcohalide films.
authors.affiliation: National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
authors.forename: Senlin
authors.initials: S
authors.lastname: Yang
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Wang
authors.forename: Haitao
authors.initials: H
authors.lastname: Guo
authors.forename: Guoping
authors.initials: G
authors.lastname: Dong
authors.forename: Bo
authors.initials: B
authors.lastname: Peng
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.forename: Yi
authors.initials: Y
authors.lastname: Shi
mesh_terms: D001537:Bencyclane / Q000737:chemistry*; D018011:Chalcogens / Q000737:chemistry* / Q000528:radiation effects; D004595:Electroplating / Q000379:methods*; D007259:Infrared Rays; D007834:Lasers; D008422:Materials Testing; D008567:Membranes, Artificial; D013932:Thulium / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D018011:Chalcogens; D008567:Membranes, Artificial; D001537:Bencyclane; D013932:Thulium