Novosibirsk State University, 2 Pirogova str., Novosibirsk, 630090, Russia.
Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia.
Sci Rep. 2017 Jun 27;7(1):4301. doi: 10.1038/s41598-017-04059-z.
Synthetic photonic lattices provide unique capabilities to realize theoretical concepts emerging in different fields of wave physics via the utilization of powerful photonic technologies. Here we observe experimentally Anderson localization for optical pulses in time domain, using a photonic mesh lattice composed of coupled fiber loops. We introduce a random potential through programmed electro-optic pulse phase modulation, and identify the localization features associated with varying degree of disorder. Furthermore, we present a practical approach to control the band-gap width in photonic lattices by varying the coupling between the fiber loops, and reveal that the strongest degree of localization is limited and increases in lattices with wider band-gaps. Importantly, this opens a possibility to enhance or reduce the effect of disorder and associated localization of optical pulses.
合成光子晶格通过利用强大的光子技术，为实现不同领域的波动物理理论概念提供了独特的功能。在这里，我们通过程控电光脉冲相位调制，在时域中利用耦合光纤环组成的光子网格结构，实验观测到了光脉冲的安德森局域化。我们引入了一个随机势，并确定了与不同无序程度相关的局域化特征。此外，我们还提出了一种通过改变光纤环之间的耦合来控制光子晶格带隙宽度的实用方法，并揭示了最强局域化程度是有限的，并且在带隙较宽的晶格中增加。重要的是，这为增强或减少光脉冲的无序和相关局域化效应提供了一种可能性。
