Data set: A solid-state high harmonic generation spectrometer with cryogenic cooling

Solid-state high harmonic generation (sHHG) spectroscopy is a promising technique for studying electronic structure, symmetry, and dynamics in condensed matter systems. Here, we report on the implementation of an advanced sHHG spectrometer based on a vacuum chamber and closed-cycle helium cryostat. Using an in situ temperature probe, it is demonstrated that the sample interaction region retains cryogenic temperature during the application of high-intensity femtosecond laser pulses that generate high harmonics. The presented implementation opens the door for temperature-dependent sHHG measurements down to a few Kelvin, which makes sHHG spectroscopy a new tool for studying phases of matter that emerge at low temperatures, which is particularly interesting for highly correlated materials., , , # Data Set: A solid-state high harmonic generation spectrometer with cryogenic cooling [https://doi.org/10.5061/dryad.5hqbzkhf0](https://doi.org/10.5061/dryad.5hqbzkhf0) This data set contains all raw data and scripts for plotting the data shown in the paper that is open access here: [https://doi.org/10.1063/5.0174407](https://doi.org/10.1063/5.0174407) . ## Description of the data and file structure The repository contains subfolders named after the figures in the published paper which contain measured data. Each subfolder contains a data file (if data is shown in the figure). The primary parameters that are varied in a given experiment are represented in the raw-file name. For example, in Fig. 5 a temperature scan was performed for different fluences. The raw file names are e.g. \"105K-0.75uJ.txt\" referring to the spectrum measured at 105 K temperature at 0.75 µJ pulse energy. This naming convention is consistent throughout the repository. The raw data files themselves are encode...固态高谐波产生（solid-state high harmonic generation, sHHG）光谱技术是研究凝聚态物质体系电子结构、对称性与动力学特性的极具前景的研究手段。本文报道了一套基于真空腔与闭环氦低温恒温器的先进sHHG光谱仪搭建方案。通过原位温度探针的实测表明，在施加产生高谐波的高强度飞秒激光脉冲期间，样品相互作用区域仍可维持低温环境。本方案为低至几开尔文的温度依赖型sHHG测量开辟了新路径，使sHHG光谱技术成为研究低温下涌现物相的全新工具，这对于强关联材料体系的研究尤为重要。 # 数据集：具备低温冷却功能的固态高谐波产生光谱仪 [https://doi.org/10.5061/dryad.5hqbzkhf0](https://doi.org/10.5061/dryad.5hqbzkhf0) 本数据集包含该开放获取论文中展示的全部原始数据与绘图脚本，论文链接为：[https://doi.org/10.1063/5.0174407](https://doi.org/10.1063/5.0174407)。 ## 数据与文件结构说明 本数据集仓库包含以已发表论文中图号命名的子文件夹，用于存储对应图表的实测数据。每个子文件夹中（若对应图表包含实测数据）均配有数据文件。实验中调整的核心参数会体现在原始数据文件名中。例如，图5针对不同脉冲能量开展了温度扫描实验，其原始文件名如"105K-0.75uJ.txt"，对应105 K温度、0.75 µJ脉冲能量下测得的光谱。该命名规则在整个仓库中保持统一。原始数据文件本身采用编码格式……