1D-modulated plasmonic Dirac systems: Towards helicity-driven terahertz photovoltaics

该项目的重点在于探索太赫兹（THz）辐射诱导的线性能量色散纳米结构中的电子传输。该项目汇集了德国-俄罗斯联盟的五个实验和理论小组的专业知识，旨在深入了解一维周期调制狄拉克费米子系统中螺旋驱动的光伏效应的起源。特别是，我们计划探索不同几何形状的等离子体晶体中螺旋驱动效应的物理学，这些系统中电流诱导的不稳定性以及等离子体干涉的影响。研究的重点是石墨烯横向超晶格，以及基于HgTe的拓扑绝缘体（TIs）和狄拉克费米子系统。这项工作应该定义现有高频电子学的极限，并揭示新的物理现象，从而扩大未来太赫兹光电器件的范围，特别是关于辐射斯托克斯参数的全电探测器的发展。

The focus of the project lies on the exploration of terahertz (THz) radiation induced electron transport in nanostructures with linear energy dispersion. The project, bringing together the expertise of five experimental and theoretical groups of the German-Russian consortium, aims at getting insight into the origin of helicity driven photovoltaic effects in 1D periodic modulated Dirac fermion systems. In particularly, we plan to explore the physics of helicity driven effects in plasmonic crystals of different geometries, current induced instabilities in these systems as well as effects of plasmonic interference. The research is focused on graphene lateral superlattices as well as on HgTe based topological insulators (TIs) and Dirac fermion systems. The work should define the limits of existing high frequency electronics and uncover new physical phenomena, thus extending the scope of future THz optoelectronic devices, in particular with respect to the development of an all-electric detector of the radiation Stokes parameters.