Lahini Y, Pugatch R, Pozzi F, Sorel M, Morandotti R, Davidson N, Silberberg Y
Department of Physics of Complex Systems, The Weizmann Institute of Science, Rehovot, Israel.
Phys Rev Lett. 2009 Jul 3;103(1):013901. doi: 10.1103/PhysRevLett.103.013901. Epub 2009 Jun 30.
We report the observation of the signature of a localization phase transition for light in one-dimensional quasiperiodic photonic lattices, by directly measuring wave transport inside the lattice. Below the predicted transition point an initially narrow wave packet expands as it propagates, while above the transition expansion is fully suppressed. In addition, we measure the effect of focusing nonlinear interaction on the propagation and find it increases the width of the localized wave packets.
我们通过直接测量一维准周期光子晶格中光的波传输，报告了对光的局域化相变特征的观察结果。在预测的转变点以下，一个初始狭窄的波包在传播时会扩展，而在转变点以上，扩展则被完全抑制。此外，我们测量了聚焦非线性相互作用对传播的影响，发现它增加了局域化波包的宽度。
