Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation.

Author(s) Pang, C.; Li, R.; Li, Z.; Dong, N.; Wang, J.; Ren, F.; Chen, F.
Journal Nanotechnology
Date Published 2019 Aug 16

We report the Ag nanoparticles (NPs) embedded in LiTaO (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 LiTaO by embedding Ag NPs, but also develops AgNP:LT as a new SA for ultrafast laser generation.

DOI 10.1088/1361-6528/ab1b97
ISSN 1361-6528
Citation Nanotechnology. 2019;30(33):334001.

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