Control of extreme light scattering in nanophotonic networks

该项目旨在将超快光谱学应用于表征和控制系统中的光，在这些系统中，光被多次散射强烈捕获。复杂性和非线性媒体的结合开辟了以非传统方式操纵和利用光的新方向。我们团队的早期实验已经确定了一个原创的研究领域，这个博士项目充分探索了这一领域。学生将把最先进的光学实验与纳米材料的设计和优化结合起来，这些材料既表现出极端的散射特性，又表现出强烈的非线性响应。超快技术将被应用于控制极端散射系统中的光流动，以及研究基本的物理基础。非线性将被用作研究复杂光的基本性质的微扰工具。我们将使用泵浦和探测光谱学在线性域中恢复系统的空间和时间特性，解决与开放传输通道、介观干扰校正和局域效应相关的重要开放问题。这项研究的一个重要工具将是使用空间光调制器来控制光。该项目结合了非线性度和波前整形，旨在设计对入射光有很强影响的系统，最终目标是获得超快光学开关、自不稳定性、光学嵌合体和神经形态光学处理器。

This project aims to apply ultrafast spectroscopy in characterising and controlling light in systems where light is strongly trapped by multiple scattering. The combination of complexity and nonlinear media opens up new directions of manipulating and using light in unconventional ways. Early experiments in our group have defined an original field of research which is fully explored in this PhD project. The student will combine state of the art optical experiments with design and optimisation of nanomaterials that exhibit both extreme scattering properties and a strongly nonlinear response. Ultrafast techniques will be applied to control the flow of light in extreme scattering systems as well as to study the fundamental underlying physics. Nonlinearity will be used as a perturbative tool for investigating the fundamental properties of complex light. We will use pump and probe spectroscopy to retrieve spatial and temporal properties of the system in the linear domain, addressing important open questions related to open transmission channels, mesoscopic interference corrections and localisation effects. An important tool in this studies will be the control of light using a spatial light modulator. Using combinations of extraordinary nonlinearity and wavefront shaping, the project aims to design systems with a strong effect on the incoming light with the ultimate aim of obtaining ultrafast optical switches, self-instability, optical chimeras, and neuromorphic optical processors.