岩石的太赫兹光谱特性研究

Optical Property of Rock in Terahertz Region

本文以太赫兹时域光谱分析技术为手段,研究了侵入岩、喷出岩、沉积岩样品的太赫兹波段光谱特性,在0.3～1.4THz光谱区域间得到了样品的光学参数,并结合偏光显微镜图片分析了样品的吸收系数和折射率值。结果表明,针对样品的结构、成分、类型的不同,透射光谱均出现了不同的吸收和折射特性。通过太赫兹光谱包含的特征信息可以对不同岩石初步进行定性分析,从而为利用太赫兹技术进一步分析岩石的成因、演化特性及其与矿化的关系提供依据和方法。

The absorption coefficients and refractive indexes at 0.3-1.4 THz of intrusive rock,effusive rock and sedimentary rock have been researched by terahertz time domain spectroscopy technology（THz-TDS）,combining with its polarizing microscope images.The results demonstrated the regular patterns that the absorption and refractive properties of samples changed with its structure,components and types.Therefore,THz-TDS is an effective method to the qualitative identification of rocks,and it will be used to lithogenesy,evolution characteristics,and mineralization relationship analysis.