Journal
NANOTECHNOLOGY
Volume 30, Issue 33, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab1b97
Keywords
Ag nanoparticles; lithium tantalate crystal; surface plasmonic resonance; ion implantation; saturable absorber; mode-locked lasers
Funding
- National Natural Science Foundation of China (NSFC) [11535008]
- National Natural Science Foundation of China [61522510]
- Project 111 of China [B13029]
- STCSM Excellent Academic Leader of Shanghai [17XD1403900]
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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 mu m wavelength, which enables AgNP:LT to be a new saturable absorber (SA) for the generation of 1 mu 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.
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