Infrared luminescence in Bi-doped Ge-S and As-Ge-S chalcogenide glasses and fibers

Abstract

Experimental and theoretical studies of spectral properties of chalcogenide Ge-S and As-Ge-S glasses and fibers are performed. A broad infrared (IR) luminescence band which covers the 1.2-2.3~$\mu$m range with a lifetime about 6~$\mu$s is discovered. Similar luminescence is also present in optical fibers drawn from these glasses. Arsenic addition to Ge-S glass significantly enhances both its resistance to crystallization and the intensity of the luminescence. Computer modeling of Bi-related centers shows that interstitial Bi${}^{+}$ ions adjacent to negatively charged S vacancies are most likely responsible for the IR luminescence.

7 pages, 4 figures

References in corpus (3)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Near-IR luminescence in bismuth-doped AgCl crystals
• Centers of near-infrared luminescence in bismuth-doped TlCl and CsI crystals