Superconducting magnet cryostat system for terahertz spectroscopy

用于太赫兹光谱的超导磁体低温恒温器系统

• 批准号: 495542626
• 金额: --
• 依托单位: Technische Universität Dortmund
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2022
• 资助国家: 德国
• 起止时间: 2021-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/495542626?language=en
• 关键词: Superconducting; magnet; cryostat; system; terahertz

The superconducting magnet cryostat system requested by the group of Prof. Lange allows for the investigation of ultrastrongly and deep-strongly light-matter coupled cavity quantum electrodynamical (c-QED) structures in the terahertz (THz) spectral range. Tailoring near fields of THz modes by quantitative, parameter-free numerical simulations, our group designs and fabricates light-matter coupled structures for c-QED experiments, as well as near-field enhancing resonators enabling THz experiments with atomically strong fields. This subwavelength control of electromagnetic fields plays a central role for our group’s aim to investigate extreme limits of light-matter interaction in which optical nonlinearities occur on time scales significantly shorter than a single cycle of light. Recent research highlights include nonlinearities of Landau electrons beyond Kohn’s theorem, the observation of dynamical Bloch oscillations and high-harmonics generation, lightwave acceleration of Dirac electrons in topological insulators, minimally dissipative spin switching in antenna-enhanced THz near fields, non-adiabatic control of deep-strongly light-matter coupled electrons in switchable THz resonators, and the observation of carrier-wave Rabi flopping of ultrastrongly coupled resonances.The requested magnet cryostat will allow us to continue this research and explore novel directions of THz subcycle physics in condensed-matter systems. The system’s key features include magnetic fields of up to 6 T while providing an exceptionally large and symmetric optical aperture corresponding to an opening angle of 45°, permitting tight focusing and thus strong THz field amplitudes, in the focal plane. These properties will enable the investigation of strong-field THz dynamics in magnetic fields, which in particular concerns our Landau polariton c-QED systems. Here, we aim for previously inaccessible light-matter coupling strengths, where the vacuum Rabi frequency significantly exceeds the carrier frequency of light. Furthermore, we will explore novel c-QED concepts including superconducting resonators or atomically thin materials such as transition metal dichalcogenides, in magnetic fields. Transitioning from linear to non-perturbatively nonlinear dynamics, we expect to unveil novel phenomena including high-order nonlinearities, generation of non-classical light, resonances generated by nonlinear interactions of cavity polaritons, or phase transitions.

Lange教授群要求的超导磁铁低温恒温器系统允许在Terahertz（THZ）光谱范围内投资超侧面和深度的轻度耦合型腔量子量子量子（C-AQED）结构。通过定量的，无参数的数值模拟，我们的小组设计并制造了轻质的耦合结构，用于C-AQ-QED实验，以及近场增强的谐振器，从而使THZ实验具有原子上强场上的实验。电磁场的这种亚波长度控制起着我们小组的目标，目的是调查光 - 物质相互作用的极端限制，在该相互作用中，光学非线性在时间尺度上比单个光周期明显短。最近的研究亮点包括Kohn定理以外的Landau电子产品的非线性，动态Bloch振荡的观察和高锤子的产生，拓扑绝缘体中Dirac Electronics的灯光加速，微小的散发性旋转旋转在近距离触觉中，无效的触发器，无效的较高的液体控制液，并控制了深度的液体控制液，并控制了深度的液位，并控制了深层的液位，即可旋转液位，并控制较高的液位。并且观察超构耦合共振的载体波狂欢率颤动。所需的磁铁低温恒温器将使我们能够继续进行这项研究并探索凝聚态的系统中THZ Subcycle物理学的新方向。该系统的主要特征包括高达6吨的磁场，同时提供了与45°开头的异常大型和对称的光孔相对应的，从而允许焦点紧密的聚焦，从而在焦平面中提供了强烈的THZ场放大器。这些属性将使强场THZ动态在磁场中的投资，这特别涉及我们的Landau Polariton C-AQ-QED系统。在这里，我们旨在以前无法访问的光耦合强度，在该耦合强度上，真空狂犬病频率显着超过了光的载体频率。此外，我们将探索新颖的CQED概念，包括超导谐振器或原子薄的材料，例如过渡金属二甲构基化，在磁场中。从线性到非扰动的非线性动力学的过渡，我们期望揭露新的现象，包括高阶非线性非线性，非经典光的产生，腔偏光子的非线性相互作用产生的共振或相变。