دورية
Q-switching Yb^3+: YAG lasers based on plasmon resonance nonlinearities of Cu_2−xSe@Cu_2−xS nanorods
| العنوان: | Q-switching Yb^3+: YAG lasers based on plasmon resonance nonlinearities of Cu_2−xSe@Cu_2−xS nanorods |
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| المؤلفون: | Zhan, Yi, Wang, Yimeng, Long, Jinlin, Zu, Jifeng, Wang, Li, Wang, Congcong, Qu, Ting, Liu, Qian |
| المصدر: | Optics Letters; July 2017, Vol. 42 Issue: 13 p2619-2622, 4p |
| مستخلص: | Copper(II) chalcogenide nanocrystals, including Cu_2−xY (Y=S, Se, and Te), have an intense localized surface plasmon resonance (LSPR) band in the near-infrared (NIR) region. In this research, colloidal Cu_2−xSe@Cu_2−xS nanorods were synthesized using the organometallic colloidal and cation-exchange methods. The dynamics of LSPR were investigated using ultrafast laser pulses via pump–probe experiments in the NIR region. Investigation of the transient absorption spectra revealed an LSPR spectral band from approximately 850 to 1350 nm, with a center wavelength of 1030 nm. The kinetics of the recovering plasmon maximum, probed at the peak wavelength of 1030 nm, exhibited a strong nonlinear response for plasmonic absorption, with a modulation depth exceeding 25% in the transmitted signal under a pump fluence of 3.97 mJ/cm^2. The ultrafast nonlinear optical properties of these plasmonic nanoparticles could be used as excellent saturable absorbers (SAs) in ultrafast lasers. A compact passively Q-switched Yb^3+:YAG microchip laser with a Cu_2−xSe@Cu_2−xS SA was investigated. Furthermore, a maximum average output power of 187 mW was obtained, with a pulse energy of 4.11 μJ, pulse duration of 8.5 μs, and repetition rate of 45.45 KHz at a pump power of 8.7 W. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 01469592 15394794 |
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