Non-equilibrium dynamics in solids probed by terahertz fields (B08#)

太赫兹场探测固体中的非平衡动力学 (B08

• 批准号: 399838991
• 金额: --
• 依托单位: Arbeitsgruppe Ultrafast Science
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/399838991?language=en
• 关键词: Non; equilibrium; dynamics; solids; probed

In this project we will use ultrafast terahertz (THz) spectroscopy to study the non-equilibrium dynamics of electrons and the lattice in solids. Ultrafast THz spectroscopy is a femtosecond-laser based, all-optical method, ideally suited to probe the conductivity of materials, including its ultrafast dynamics. In the first funding period we will concentrate on the two key topics of the electric conductivity dynamics. 1) Photoexcited pnictogen metals Bi, Sb and As undergoing the ultrafast photoinduced structural phase transition; 2) Sub-100 fs dynamics of hot electron population in graphene, undergoing the primary thermalization process; and the effect of direct lattice excitation of graphene on its conductivity.

在这个项目中，我们将使用超快太赫兹（THz）光谱来研究固体中电子和晶格的非平衡动力学。超快太赫兹光谱是一种基于飞秒激光的全光学方法，非常适合探测材料的电导率，包括其超快动力学。在第一个资助期内，我们将重点关注电导率动力学的两个关键主题。 1) 光激发磷元素金属Bi、Sb和As经历超快光致结构相变； 2）石墨烯中热电子布居的亚100飞秒动力学，经历初级热化过程；以及石墨烯的直接晶格激发对其电导率的影响。