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光在金属界面的传输特性研究

Keywords: Snell定律,复折射率,光传输,光折射

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Abstract:

采用射频溅射方法制备了贵金属银薄膜样品.通过椭圆偏振光谱方法在1.5~4.5eV光子能量区测量获得了复介电函数和复折射率.针对3个不同波长的复折射率常数,对于光从大气入射到金属银边界,以及从金属银入射到大气边界的情况进行了具体模拟计算和分析,发现即使在平行金属膜条件下,光在大气一侧的出射角也不等于初始入射角,并且与波长、光学常数和入射角等有关的等效折射率常数和折射角均为正值,在整个光谱区不改变符号,与实验观察的结果不相符合.实例计算所揭示的这些涉及到光在金属中的传输特性仍有待于更多的实验和理论研究.

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