Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation
Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation
复制标题
嵌入钽酸锂晶体中的等离子银纳米颗粒用于超快激光产生
DOI：
10.1088/1361-6528/ab1b97
复制
发表时间：
2019-08-16
期刊：
影响因子：
3.5
通讯作者：
Chen, Feng
中科院分区：
文献类型：
--
作者：
Pang, Chi;Li, Rang;Chen, Feng
本文报道了用Ag+离子直接注入法在LiTaO_3（AgNP：LT）中嵌入Ag纳米颗粒的研究。透射电子显微镜成像表明，嵌入的银纳米粒子的平均直径为3.65 nm。由于局域表面等离子体共振效应，观察到AgNP：LT在477 nm处的线性吸收光谱。Z扫描研究表明，AgNP：LT在近红外1 μm波段具有超快饱和吸收，可用于产生脉宽为35 ps、重复频率为8.74 GHz的1 μm调Q锁模脉冲激光。这项工作不仅开辟了一种新的方式来定制的非线性LiTaO3嵌入Ag+ NPs，但也开发AgNP：LT作为一种新的SA的超快激光产生。
We report the Ag nanoparticles (NPs) embedded in LiTaO3 (AgNP:LT) by direct Ag+ ion implantation. Transmission electron microscope imaging indicates that the embedded Ag NPs have an average diameter of 3.65 nm. The linear optical absorption spectrum of AgNP:LT peaking at 477 nm is observed owing to the typical effect of localized surface plasmon resonance. Z-scan investigation shows ultrafast saturable absorption of AgNP:LT at the near infrared 1 μm wavelength, which enables AgNP:LT to be a new saturable absorber (SA) for the generation of 1 μm Q-switched mode-locked pulsed laser with pulse duration of 35 ps and repetition rate of 8.74 GHz. This work not only opens a new way to tailor the nonlinearity of LiTaO3 by embedding Ag+ NPs, but also develops AgNP:LT as a new SA for ultrafast laser generation.