Ultrafast Optics and Terhertz Photonics

该项目将侧重于进入高THz场制度的努力。它将需要使用苏塞克斯的高能100 GW级超快激光基础设施（仅可向英国有限数量的其他光子研究实验室提供），并将涉及必要的培训-在国际场景中非常有价值的技能-用于在极端光激发物理学领域开展积极的研究。更具体地说，该项目的目标是研究由强太赫兹场引起的非线性场-物质相互作用。特别是博士生将开发一个低噪声3uJ级太赫兹源的基础上，所谓的倾斜波前非线性生成，在特定领域的新前沿的物理。该系统将用于更好地了解电子扩散中许多材料中电子分布的超快载流子动力学，并探索场诱导载流子加速的新机制。此外，该研究还将研究增强太赫兹场的方法，从理论和数值上设计通过所谓的表面等离子体现象实现亚波长限制的器件。该项目将一项新颖的实验活动与研究小组内正在进行的理论发展联系起来。

The project will focus on efforts to access high THz field regimes. It will require access to Sussex's high-energy 100GW-class ultrafast laser infrastructure (readily available only to a limited number of other photonic research labs within the UK) and will involve the necessary training -an extremely valuable skill within the international scenario- for developing active research in the field of the physics of extreme optical excitations.More specifically, the project targets the investigation of the nonlinear field-matter interaction induced by strong THz fields. In particular the PhD student will develop a low-noise 3uJ-level THz source based on the physics of the so called tilted-wave front nonlinear generation, the new frontier in the specific domain. Such a system will be deployed to gain a better understanding of ultrafast carrier dynamics of electron distributions in many materials diffused in electronics, and to explore novel regime a field induced carrier acceleration.In addition, the research will investigate ways to enhance the THz field, theoretically and numerically designing devices for subwavelength confinement via the so-called surface-plasmons phenomenon. This project links a novel experimental activity with the ongoing of theoretical development within the research group.