Muller Olivier, Dengler Stefanie, Ritt Gunnar, Eberle Bernd
French-German Research Institute of Saint-Louis-ISL, Optronics & Non-Linear Optics--5 rue du Général Cassagnou--BP 70034, Saint-Louis Cedex 68301, France.
Appl Opt. 2013 Jan 10;52(2):139-49. doi: 10.1364/AO.52.000139.
The optical limiting behavior of silver nanoparticles with different sizes and shapes is investigated and compared to the optical limiting performance of conventional carbon black suspension (CBS). The optical limiting behavior is characterized by means of nonlinear transmittance and scattered intensity measurements when submitted to nanosecond pulsed Nd:YAG lasers operating at the fundamental or the second harmonic wavelength. We found that the optical limiting effect is strongly particle size dependent and the best performance is achieved with the smaller particles. Moreover, it is shown that the surface plasmon resonance is not the main effect responsible for the nonlinear processes. A theoretical model based on the computation of the Mie scattering functions is exposed, and it is shown that the experimental results can be well explained from the calculations.
研究了不同尺寸和形状的银纳米颗粒的光学限幅行为，并将其与传统炭黑悬浮液（CBS）的光学限幅性能进行了比较。当暴露于在基频或二次谐波波长下运行的纳秒脉冲Nd:YAG激光器时，通过非线性透过率和散射强度测量来表征光学限幅行为。我们发现光学限幅效应强烈依赖于颗粒尺寸，较小的颗粒具有最佳性能。此外，研究表明表面等离子体共振不是导致非线性过程的主要效应。提出了一个基于米氏散射函数计算的理论模型，结果表明实验结果可以通过计算得到很好的解释。
