椭偏光谱与椭圆旋向

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椭圆偏振光谱因其独特的优点广泛应用于薄膜科学和技术中。光度法椭圆偏振光谱中椭圆旋向是不能直接确定的,从而不能确定椭偏参数Δ。这一定程度上有碍椭圆偏振光谱的应用。本文引入克拉末-克朗尼格(Kramers-Kronig)关系,推导出椭偏参数的Ψ-Δ关系,从频谱的信息得出椭圆旋向。并比较了其应用的结果,表明由此可实现实验数据从[tanΨ(ω),cosΔ(ω)]谱到[Ψ(ω),Δ(ω)]谱的转换。
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