多光子激发上转换发光和放大自发发射来自Te4+-Doped Cs2SnCl6纳米晶体
Wei Zhang1,2, Wei Zheng1, Lingyun Li2
1State Key Laboratory of Structural Chemistry and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
ACS nano
|May 6, 2025
概括
研究人员开发了新的Te4+化Cs2SnCl6纳米晶体,使高阶多光子吸收 (MPA) 达到七光子吸收 (7PA). 由于其增强的非线性光学特性,这些材料对先进的纳米光子应用具有前景.
科学领域:
- 材料科学 材料科学 材料科学
- 光学是什么?光学是什么?
- 纳米技术 纳米技术
背景情况:
- 高级非线性多光子吸收 (MPA) 为光子和生物应用提供了空间限制和深层组织透等优势.
- 除了三光子吸收之外,MPA的实际使用受到吸收截面下降和材料不稳定性的限制.
研究的目的:
- 通过设计具有增强非线性光学特性的新型纳米晶体来克服高阶MPA的局限性.
- 在工程材料中证明高效的高阶多光子吸收和放大自发发射.
主要方法:
- 合成Te4+添加剂的Cs2SnCl6纳米晶体 (NCs).
- 从800-2600nm宽带非线性光学响应的表征.
- 评估两到七光子吸收 (PA) 截面.
- 展示3PA激发的放大自发发射 (ASE) 用一个femtosecond脉冲激光.
主要成果:
- 设计的NC表现出宽带非线性响应,并实现两到七光子吸收 (PA).
- 获得的PA截面超过了传统非线性光学材料的截面.
- 证明了3PA激发的放大自发发射 (ASE) 具有非常低的激发值 (0.22μJ cm-2).
- 性能显示,与现有的非线性ASE系统相比,1-4级的改进.
结论:
- 与Te4+合的Cs2SnCl6NCs具有出色的七光子吸收 (7PA) 性能.
- 这些无金属化物NC对极端非线性纳米光子学和高效发光应用具有前景.
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