Ultra-broadband shortwave infrared emission under blue light excitation of a Cr 3+ /Ni 2+ co-doped Y 3 Al 3 MgSiO 12 garnet phosphor through effective energy transfer and its applications

Efficient Cr 3+ →Ni 2+ energy transfer in Y 3 Al 3 MgSiO 12 :Cr 3+ –Ni 2+ enables broadband SWIR emission under blue-light excitation, featuring high thermal stability for covert recognition and nondestructive detection.