等离激元纳米材料超快激光光热形变原理及应用

来源 :激光与光电子学进展 | 被引量 : 0次 | 上传用户:timeman
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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。
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