Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Jena, Germany.
Phys Rev Lett. 2010 Dec 31;105(26):263901. doi: 10.1103/PhysRevLett.105.263901. Epub 2010 Dec 20.
We report the first experimental observation of three-dimensional light bullets, excited by femtosecond pulses in a system featuring quasi-instantaneous cubic nonlinearity and a periodic, transversally modulated refractive index. Stringent evidence of the excitation of light bullets is based on time-gated images and spectra which perfectly match our numerical simulations. Furthermore, we reveal a novel evolution mechanism forcing the light bullets to follow varying dispersion or diffraction conditions, until they leave their existence range and decay.
我们报告了在具有准瞬时立方非线性和横向调制折射率的系统中，通过飞秒脉冲激发三维光子弹的第一个实验观察结果。基于时间门控图像和光谱的严格证据与我们的数值模拟完全匹配，证明了光子弹的激发。此外，我们揭示了一种新的演化机制，迫使光子弹跟随变化的色散或衍射条件，直到它们离开存在范围并衰减。
