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来自光子雪崩纳米粒子的巨大非线性光学反应

Changhwan Lee¹, Emma Z Xu¹, Yawei Liu^2,3

¹Department of Mechanical Engineering, Columbia University, New York, NY, USA.

|January 14, 2021

概括

研究人员在单个纳米晶体中实现了光子雪崩,使得超分辨率成像成为可能. 这些雪崩式纳米粒子 (ANPs) 为先进的光学应用提供了更高的分辨率和更低的激发强度.

科学领域:

非线性光学
纳米技术
生物光学

背景情况:

雪崩现象是由非线性动力学驱动的,
对于光学成像和升级激光等技术来说,
之前的观察仅限于散装材料,限制了实际应用.

研究的目的:

在室温下实现单个纳米结构的光子雪崩.
展示这些纳米结构在超高分辨率成像中的应用.
在近红外透明窗口中探索它们在生物成像中的潜力.

主要方法:

制造添加 (Tm3+) 上转化纳米晶体.
光子雪崩现象的特征,包括激发功率值和激发状态吸收.
使用扫描共焦显微镜实现光子雪崩单束超分辨率成像.

主要成果:

在单个纳米晶体中实现室温光子雪崩 (雪崩纳米粒子,ANP).
在强度的第26功率超过值时观察到非线性排放扩展.
用ANP显示70纳米分辨率成像,需要较低的激发强度.

结论:

单个纳米结构的光子雪崩是可行的,并提供了显著的优势.
在高分辨率和低光水平下,ANP可提供高效的超高分辨率成像.
它们的特性表明它们在子波长成像和传感应用中具有广泛的用途.

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