1. Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation
- Author
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Ziqi Li, Ningning Dong, Rang Li, Feng Chen, Feng Ren, Jun Wang, and Chi Pang
- Subjects
Materials science ,Absorption spectroscopy ,Bioengineering ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,law ,General Materials Science ,Electrical and Electronic Engineering ,Surface plasmon resonance ,Plasmon ,business.industry ,Mechanical Engineering ,Saturable absorption ,General Chemistry ,021001 nanoscience & nanotechnology ,Laser ,0104 chemical sciences ,Ion implantation ,chemistry ,Mechanics of Materials ,Lithium tantalate ,Optoelectronics ,0210 nano-technology ,business ,Ultrashort pulse - 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 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.
- Published
- 2019