Crystal-field engineering of ultrabroadband mid-infrared emission in Co2+-doped nano-chalcogenide glass composites. Issue 1 (January 2020)

• Record Type: Journal Article
• Authors: Lu, Xiaosong; Zhang, Runan; Zhang, Yindong; Zhang, Shaoqian; Ren, Jing; Strizik, Lukas; Wagner, Tomas; Farrell, Gerald; Wang, Pengfei
• Is Part Of: Journal of the European Ceramic Society. Volume 40:Issue 1(2020)
• Page Start: 103
• Page End: 107
• Publication Date: 2020-01
• Subjects: Crystal field engineering -- Mid-infrared emission -- II–VI crystal -- Chalcogenide glass -- Co2+; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.09.006
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Tunable and ultrabroadband mid-infrared (MIR) emissions in the range of 2.5–4.5 μm are firstly reported from Co 2+ -doped nano-chalcogenide (ChG) glass composites. The composites embedded with a variety of binary (ZnS, CdS, ZnSe) and ternary (ZnCdS, ZnSSe) ChG nanocrystals (NCs) can be readily obtained by a simple one-step thermal annealing method. They are highly transparent in the near- and mid-infrared wavelength region. Low-cost and commercially available Er 3+ -doped fiber lasers can be used as the excitation source. By crystal-field engineering of the embedded NCs through cation- or anion-substitution, the emission properties of Co 2+ including its emission peak wavelength and bandwidth can be tailored in a broad spectral range. The phenomena can be accounted for by crystal-field theory. Such nano-ChG composites, perfectly filling the 3–4 μm spectral gap between the oscillations of Cr 2+ and Fe 2+ doped IIVI ChG crystals, may find important MIR photonic applications (e.g., gas sensing), or can be used directly as an efficient pump source for Fe 2+ : IIVI crystals which are suffering from lack of pump sources.