High resolution spectroscopy apparatus for acousto-optic-electric investigations at low temperatures

用于低温声光电研究的高分辨率光谱仪

• 批准号: 494822818
• 金额: --
• 依托单位: Universität Münster
• 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/494822818?language=en
• 关键词: resolution; spectroscopy; apparatus; acousto; optic

The requested apparatus enables high resolution acousto-opto-electric spectroscopy employing surface acoustic waves at low temperatures and high frequencies. The investigation of modern emerging classes of materials such as van der Waals heterostructures or nanoscale perovskites requires a versatile Systems. The apparatus comprises an optical cryostat, a supercontinuum white light laser and a vector network analyser. The configuration is completed by key components enabling time-resolved optical spectroscopy. The optical cryostat enables experiments over a wide range of temperature (below 5 K up to room temperature) and is equipped with radio frequency electrical connections and a 3-axis low temperature positioned. The supercontinuum white light laser is equipped with narrow bandpass tunable optical filters and enables optical excitation over a wide wavelength range from 410 nm up to 2000 nm. Surface acoustic waves are generated and detected by a 4-port vector network analyser. This unique configuration enables for instance the contact-free study of photoconductivity in nanoscale materials with highest spatial and spectral resolutions over a wide range of temperatures and at frequencies up to 20 GHz and to unravel the underlying physical mechanisms. The high frequencies up to 20 GHz accessible in the system enable the generation of novel acoustic lattices to trap and control charge and spin excitations. The apparatus is complemented with additional components required for time-integrated and time-resolved stroboscopic photoluminescence spectroscopy. Thus, the entire spectrum of advanced acousto-opto-electrical spectroscopy techniques are unified in the requested apparatus which enables the comprehensive investigation of a wide palette of modern hybrid Quantum and Nanomaterials with complementary methods.

所要求的仪器能够在低温和高频下使用表面声波进行高分辨率声光电光谱分析。对范德华异质结构或纳米钙钛矿等现代新兴材料的研究需要一个多功能的系统。该装置由光学低温恒温器、超连续白光激光器和矢量网络分析仪组成。配置由启用时间分辨光学光谱学的关键组件完成。光学低温恒温器可以在很宽的温度范围内(低于5K到室温)进行实验，并配备了射频电气连接和一个3轴低温定位。超连续白光激光器配备了窄带通可调滤光器，可以在从410 nm到2000 nm的宽波长范围内进行光激发。声表面波由4端口矢量网络分析仪产生和检测。例如，这种独特的配置使得能够在宽范围的温度和高达20 GHz的频率下以非接触的方式研究具有最高空间和光谱分辨率的纳米材料的光电导，并揭示其潜在的物理机制。该系统中可访问的高达20 GHz的高频使新型声学晶格的产生能够捕获和控制电荷和自旋激发。该装置还补充了时间积分和时间分辨频闪光致发光光谱所需的额外组件。因此，先进的声光电光谱技术的整个光谱都统一在所要求的仪器中，这使得能够用互补的方法对广泛的现代混合量子和纳米材料进行全面的研究。