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在发光纳米晶体中对光子雪崩向上转换的概括方法

Artiom Skripka^1,2, Minji Lee^1,3, Xiao Qi¹

¹The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.

|July 20, 2023

概括

光子雪崩纳米粒子 (ANP) 能够实现新的非线性光学应用. 这项研究证明了调整ANP发射波长并使用Gd3+辅助能量迁移从新离子产生非线性发射.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
光学是什么?光学是什么?光学是什么?

背景情况:

光子雪崩纳米粒子 (ANP) 为高级应用提供独特的非线性光学特性.
以前的ANP仅限于特定的兴奋剂 (Tm3+,Pr3+,Nd3+) 和发射波长.
开发具有可调节发射的新ANP对于更广泛的应用至关重要.

研究的目的:

利用Gd3+辅助的能量迁移来调整Tm3+敏感的ANP的发射波长.
从新的稀土离子 (Eu3+,Tb3+,Ho3+,Er3+) 产生高度非线性辐射.
为了证明ANP雪崩行为的延伸到相邻的光体.

主要方法:

在Tm3+敏感的ANP中使用Gd3+辅助的能量迁移.
在低功率密度 (7 kW cm-2) 处使用 1064 nm 激光激发 ANP.
描述向上转换的排放强度和非线性系数 (s=10-17).
将ANP与CdS/CdSe/CdS核心/外/外量子点进行集成.

主要成果:

从Eu3+,Tb3+,Ho3+和Er3+离子获得了光谱分离的,高度非线性向上转换的辐射.
在低激发功率密度下证明高非线性系数 (s=10-17).
成功将雪崩行为转移到相邻的量子点,从线性发射器产生非线性辐射.

结论:

Gd3+辅助的能量迁移有效调整ANP排放,并使新离子的非线性排放成为可能.
这一战略扩大了光子雪崩的范围,用于各种应用.
具有能源传输网络的ANP的合理设计将线性发射器转化为非线性发射器.

关键词:

非线性排放者是指非线性排放者.一个光子雪崩.频谱调是指光谱调.上升转换是一种上升转换.

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