Terahertz time-domain spectroscopy has been used for the characterization of different types of olive oil, such as extra virgin, pure, extra light, and pomace olive oils. Temperature-dependent refractive indices and absorption coefficients have been measured in 0.2–1.6 THz spectral-frequency range. Temperature-dependent Sellmeier coefficients and thermo-optic coefficients of these oil samples have also been derived from the measured data. These results will benefit different oil-based optical devices requiring accurate knowledge of their refractive indices in THz range.

中文翻译：

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太赫兹时域光谱法测量不同类型橄榄油的温度相关的热光学参数

太赫兹时域光谱法已用于表征不同类型的橄榄油，例如特级初榨橄榄油，纯正橄榄油，特级轻度橄榄油和果渣橄榄油。在0.2–1.6 THz光谱频率范围内测量了温度相关的折射率和吸收系数。这些油样品的温度相关的Sellmeier系数和热光系数也已从测量数据中得出。这些结果将使需要准确了解其在THz范围内的折射率的不同油基光学器件受益。