Department of Electrical and Computer Engineering and Institute for Optical Science, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
Phys Rev Lett. 2009 Oct 2;103(14):143903. doi: 10.1103/PhysRevLett.103.143903. Epub 2009 Oct 1.
We report the observation of quasi-Bloch oscillations, a recently proposed, new type of dynamic localization in the spatial evolution of light in a curved coupled optical waveguide array. By spatially resolving the optical intensity at various propagation distances, we show the delocalization and final relocalization of the beam in the waveguide array. Through comparisons with other structures, we show that this dynamic localization is robust beyond the nearest-neighbor tight-binding approximation and exhibits a wavelength dependence different from conventional dynamic localization.
我们报告了在弯曲耦合光学波导阵列中光的空间演化中准布洛赫振荡（一种新提出的新型动态局域化现象）的观测结果。通过在不同传播距离处空间分辨光强，我们展示了波导阵列中光束的去局域化和最终再局域化。通过与其他结构的比较，我们表明这种动态局域化在超出最近邻紧束缚近似的情况下仍然稳健，并表现出与传统动态局域化不同的波长依赖性。
