通过高温固相法制备了NaBaPO₄∶Er³⁺荧光材料。采用化学还原法制备银纳米颗粒（银球与银立方），并修饰到NaBaPO₄∶Er³⁺荧光材料中形成复合材料。利用银纳米颗粒表面等离激元特性实现了多激发光窗口激发下NaBaPO₄∶Er³⁺多光子近红外量子剪裁发光增强。实现了在377 nm与485 nm光激发下，银球纳米颗粒表面等离激元增强NaBaPO₄∶Er³⁺四光子与三光子近红外发光；在519 nm光激发下，银立方纳米颗粒表面等离激元增强NaBaPO₄∶Er³⁺三光子近红外发光。

NaBaPO₄∶Er³⁺ was synthesized by solid-state reaction. Ag nanoparticles(NPs)(including Ag ball and Ag cube) were synthesized by chemical reduction method. The surface plasmon resonance of Ag NPs was utilized to enhance the multi-photon near infrared(NIR) quantum cutting emission intensity under multi-excitation. The surface plasmon resonance of Ag ball NPs was utilized to enhance the NIR emission intensity of four-photon and three-photon under the excitation of 377 nm and 485 nm, respectively. The surface plasmon resonance of Ag cube NPs was utilized to enhance three-photon NIR emission intensity under the excitation of 377 nm.