Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation. (23rd May 2019)

• Record Type: Journal Article
• Authors: Pang, Chi; Li, Rang; Li, Ziqi; Dong, Ningning; Wang, Jun; Ren, Feng; Chen, Feng
• Is Part Of: Nanotechnology. Volume 30:Number 33(2019)
• Publication Date: 2019-05-23
• Subjects: Ag nanoparticles -- lithium tantalate crystal -- surface plasmonic resonance -- ion implantation -- saturable absorber -- mode-locked lasers; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab1b97
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: 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 μ m wavelength, which enables AgNP:LT to be a new saturable absorber (SA) for the generation of 1 μ m 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.