Structural Rigidity Control toward Cr ³⁺-Based Broadband Near-Infrared Luminescence with Enhanced Thermal Stability

[1 ]The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China

[2 ]Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia

[3 ]Siberian Federal University, Krasnoyarsk 660041, Russia

[4 ]Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia

[5 ]School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China