在等离子/TiO2固体膜上超快的红外到可见光子升级转换
Xianshao Zou1,2, Robert Bericat Vadell2, Bin Cai2
1Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao, Shandong 266000, People's Republic of China.
The journal of physical chemistry letters
|June 30, 2023
概括
研究人员开发了一种新的固态薄膜,用于红外到可见光子的升级转换. 这种等离子/TiO2接口增强了光吸收,通过三光子吸收过程提高了20倍的排放效率.
科学领域:
- 材料科学 材料科学 材料科学
- 光子学 是一个光子学.
- 纳米技术 纳米技术
背景情况:
- 光学上转换将低能光子转换为更高能量的光子.
- 现有的方法,如三倍三倍灭绝,在较慢的时间尺度上运行.
- 半导体具有陷状态,可以用于光子过程.
研究的目的:
- 开发一种固态薄膜,用于高效的红外到可见光子上转换.
- 研究等离子体纳米粒子在提高上转换效率方面的作用.
- 探索一种新的三光子吸收机制,用于向上转换.
主要方法:
- 制造一个由等离子体纳米粒子和TiO2.2组成的薄膜.
- 在800nm处激发材料以诱导多光子吸收.
- 上转换排放和效率提升的特征.
主要成果:
- 塑/TiO2接口显示,排放效率增加了20倍.
- 证实了升级转换过程是纯光子的,由增强的光学吸收驱动.
- 该过程发生在超快域 (<10 ps) 中,使用TiO2陷状态.
结论:
- 等离子纳米粒子显著增强TiO2中的光吸收,用于上转换.
- 开发的薄膜提供了一个快速有效的固态解决方案,用于红外到可见光子的升级转换.
- 这种方法可以替代较慢的基于分子的上转换机制.
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