Terahertz Photoelectric Phenomena in Semiconductor Weyl and Kane Fermion Systems

半导体韦尔和凯恩费米子系统中的太赫兹光电现象

• 批准号: 521083032
• 负责人: Professor Dr. Sergey Ganichev
• 金额: --
• 依托单位: Institut für Experimentelle und Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/521083032?language=en
• 关键词: Terahertz; Photoelectric; Phenomena; Semiconductor; Weyl

The project aims to explore the high-frequency electron transport induced by infrared/terahertz radiation in semiconductor Weyl and Kane fermion systems, which should uncover novel physical phenomena and open up opportunities to study the charge and spin transport in these systems. The project is focused on the study of photocurrent and photoconductivity in bulk Te and CdHgTe materials. As a result, we should get insight into the microscopic mechanisms of THz field-induced phenomena and enable us to develop corresponding microscopic and phenomenological theories. Particular attention will be paid to the interplay of the photogalvanic and photon drag effects as well as to magnetooptoelectronic phenomena, such as e.g. cyclotron resonance-induced photocurrents and quantum magneto-ratchet effect. We expect that the topological relativistic properties of the Weyl and Kane quasiparticles combined with the strong optical response of semiconductor systems will allow us to obtain an enhanced photoelectric response to infrared/terahertz radiation. The planned study serves the probing of high-frequency electron transport in these systems, the topology and symmetry of quantum materials, and the energy spectrum of these quasiparticles. This will be used for characterizing Weyl and Kane fermion systems. Our investigations should provide the scientific basis for novel terahertz/microwave devices.

该项目旨在探索半导体Weyl和Kane费米子系统中红外/太赫兹辐射引起的高频电子传输，这将揭示新的物理现象，并为研究这些系统中的电荷和自旋传输提供机会。本项目主要研究碲化镉和碲化镉材料的光电流和光电导特性。因此，我们应该深入了解太赫兹场诱导现象的微观机制，使我们能够发展相应的微观和唯象理论。特别注意将支付的光电流和光子拖曳效应的相互作用，以及磁光电子现象，如例如回旋共振诱导的光电流和量子磁棘轮效应。我们期望Weyl和Kane准粒子的拓扑相对论性质与半导体系统的强光学响应相结合，将使我们能够获得对红外/太赫兹辐射的增强的光电响应。计划中的研究服务于探测这些系统中的高频电子输运，量子材料的拓扑结构和对称性以及这些准粒子的能谱。这将用于表征Weyl和Kane费米子系统。我们的研究将为新型太赫兹/微波器件提供科学依据。