Pattelli Lorenzo, Savo Romolo, Burresi Matteo, Wiersma Diederik S
European Laboratory for Non-linear Spectroscopy (LENS), Università di Firenze, Sesto Fiorentino (FI) 50019, Italy.
Istituto Nazionale di Ottica (CNR-INO), Firenze (FI) 50125, Italy.
Light Sci Appl. 2016 May 6;5(5):e16090. doi: 10.1038/lsa.2016.90. eCollection 2016 May.
Spatio-temporal imaging of light propagation is very important in photonics because it provides the most direct tool available to study the interaction between light and its host environment. Sub-ps time resolution is needed to investigate the fine and complex structural features that characterize disordered and heterogeneous structures, which are responsible for a rich array of transport physics that have not yet been fully explored. A newly developed wide-field imaging system enables us to present a spatio-temporal study on light transport in various disordered media, revealing properties that could not be properly assessed using standard techniques. By extending our investigation to an almost transparent membrane, a configuration that has been difficult to characterize until now, we unveil the peculiar physics exhibited by such thin scattering systems with transport features that go beyond mainstream diffusion modeling, despite the occurrence of multiple scattering.
光传播的时空成像在光子学中非常重要，因为它提供了研究光与其宿主环境之间相互作用的最直接工具。为了研究无序和异质结构所具有的精细而复杂的结构特征，需要亚皮秒时间分辨率，这些结构特征导致了一系列尚未得到充分探索的丰富输运物理现象。一种新开发的宽场成像系统使我们能够对各种无序介质中的光输运进行时空研究，揭示了使用标准技术无法正确评估的特性。通过将我们的研究扩展到一种几乎透明的薄膜，一种迄今为止难以表征的结构，我们揭示了这种薄散射系统所展现的独特物理现象，其输运特征超越了主流扩散模型，尽管存在多次散射。
