Kartashov Yaroslav, Torner Lluis, Vysloukh Victor
Opt Express. 2005 May 30;13(11):4244-9. doi: 10.1364/opex.13.004244.
We reveal that the effective diffraction experienced by light beams launched along the central guiding channel of optical lattice with a quadratic frequency modulation can be tuned in strength and sign. Complete suppression of the linear diffraction in the broad band of spatial frequencies is shown to be possible, thus profoundly affecting properties of nonlinear self-sustained beams as well. In particular, we report on the properties of a new class of stable solitons supported by such lattices in defocusing media.
我们揭示了沿具有二次频率调制的光学晶格中心引导通道发射的光束所经历的有效衍射，其强度和符号均可调节。结果表明，在宽带空间频率中完全抑制线性衍射是可能的，这也会深刻影响非线性自持光束的特性。特别是，我们报道了在散焦介质中，由这种晶格所支持的一类新型稳定孤子的特性。
