Abstract

Transparency of the polycrystalline magnesium-aluminate spinel (MAS) in both the infrared and terahertz regions is evaluated and compared with other frequency-used window materials by Fourier transform infrared spectroscopy and terahertz time-domain spectroscopy. The MAS material exhibits higher transmissivity in both the infrared and terahertz regions than other materials. Excellent flexural strength also ensures that it can be subject to the atmospheric pressure. Therefore, this material is suitable to be applied as a broadband transparent window in the infrared synchrotron radiation pump-terahertz time-domain spectroscopy probe experimental platform which works in the low-temperature and high-vacuum conditions. Our work provides a groundwork for the understanding of the native properties of the polycrystalline MAS. The result suggests a new window material to be employed in the low-temperature and high-vacuum conditions.

Graphical abstract

中文翻译：

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多晶 MgAl $$_{2}$$ O $$_{4}$$ 尖晶石，用于红外和太赫兹区域窗口

摘要

通过傅里叶变换红外光谱和太赫兹时域光谱评估了多晶镁铝尖晶石（MAS）在红外和太赫兹区域的透明度，并与其他频率使用的窗口材料进行了比较。MAS材料在红外和太赫兹区域表现出比其他材料更高的透射率。优异的弯曲强度也保证了它可以承受大气压力。因此，该材料适合作为宽带透明窗口应用于低温高真空条件下工作的红外同步辐射泵浦-太赫兹时域光谱探针实验平台。我们的工作为理解多晶 MAS 的固有特性奠定了基础。结果表明可以在低温和高真空条件下使用一种新的窗口材料。

图形概要