摘要

超快激光具有极短的脉宽和极高的峰值强度,已被广泛应用于等离激元纳米材料的加工。在极高的激光功率密度下,等离激元纳米材料中的自由电子吸收入射光子能量成为热电子,然后通过电子与晶格的耦合作用使得晶格温度升高,诱导等离激元纳米材料产生光热形变。根据激光功率密度与熔化沸腾阈值的关系,综述了等离激元材料的三种光热形变——阈值熔化、表面原子扩散和激光烧蚀的不同原理;同时还介绍了等离激元纳米材料超快激光光热形变在多维光存储、结构色彩色打印和信息加密隐写等领域的应用。

Abstract

Owing to its advantages of ultrashort pulse width and extremely high peak intensity, ultrafast lasers have been widely used in fabricating plasmonic nanomaterials. Laser beams with extremely high power densities heat the free electrons in plasmonic nanomaterials, thereby increasing the lattice temperature and causing photothermal reshaping. Depending on the power density of the laser beam and the melting/boiling threshold, we review three types of photothermal reshaping mechanisms: complete melting above threshold, surface atom diffusion below melting temperature, and ablation. The exemplary applications of photothermal reshaping of plasmonic nanomaterials in optical data storage, plasmonic color printing, and steganography are reviewed.

补充资料

中图分类号：O436

DOI：10.3788/LOP57.111401

所属栏目：“超快激光加工”专题—穷理探幽基础篇

基金项目：国家科技部重点研发计划、国家自然科学基金、广东省珠江人才创新团队项目、广东省自然科学基金、广州市科技计划;

收稿日期：2020-04-13

修改稿日期：2020-04-30

网络出版日期：2020-06-01

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联系人作者：李向平(xiangpingli@jnu.edu.cn)

备注：国家科技部重点研发计划、国家自然科学基金、广东省珠江人才创新团队项目、广东省自然科学基金、广州市科技计划;

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引用该论文

Zhang Mingsi,Jiang Meiling,Feng Ziwei,Ouyang Xu,Cao Yaoyu,Li Xiangping. Fundamentals and Applications of Ultrafast Laser Induced Photothermal Reshaping of Plasmonic Nanomaterials[J]. Laser & Optoelectronics Progress, 2020, 57(11): 111401

张明偲,姜美玲,冯紫微,欧阳旭,曹耀宇,李向平. 等离激元纳米材料超快激光光热形变原理及应用[J]. 激光与光电子学进展, 2020, 57(11): 111401