Effectively Designing Infrared Nonlinear Optical Materials with Magnetism, MMn6Ga6S16 (M=Ca, Sr, Ba, Pb) Aided by the Stable Open Frameworks

Abstract

Infrared nonlinear optical (NLO) materials are crucial to the development of laser technology. However, how to effectively synthesize those is still a big challenge. Herein, aided by the stable open framework, four IR NLO materials, MMn6Ga6S16 (M=Ca, Sr, Ba, Pb) have been effectively synthesized in a high-temperature vacuum sealing system. They all crystalize in non-centrosymmetric (NCS) space group, P6(_), and their structures feature a three-dimensional open framework composed of Mn-S single and double chains and Ga-S single and double chains, in which these one-dimensional chains increase the structural flexibility and adjustability to accommodate varied cations with different ionic radius. Remarkably, MMn6Ga6S16 (M=Ca, Sr, Ba, Pb) exhibit not only comprehensive NLO performances including appropriate NLO responses and band gaps, wide transmission range, but also para-magnetism in magnetic properties, indicating MMn6Ga6S16 (M=Ca, Sr, Ba, Pb) are potential IR multifunctional materials. This work suggests that the stable open framework can be used to construct varied structures, which brings a new platform for effectively designing multifunctional materials.