【摘要】 利用Maxwell Garnett近似 ,并结合谱表示方法 ,理论研究了具有一般非线性的绝缘颗粒 ,无规则浸入液体主体基质复合体系的非线性光学性质 .在弱非线性条件下 ,数值研究了体系的有效线性介电函数和光学非线性随体积分数的变化 ,并发现体系的线性介电函数比光学非线性更依赖于绝缘颗粒组分的体积分数 .在一般非线性条件下 ,研究体系的有效介电函数随入射光强度的依赖关系 ,还研究了s方向和p方向极化的总反射率的行为 .更多还原

【Abstract】 The effective optical properties have been investigated in granular insulator/liquid host composite media. In the weak nonlinearity limit, we calculate numerically the effective linear dielectric function ( ε 0 e) and optical nonlinearity ( χ e) as functions of the volume fraction of insulator inclusions (f) .The results show that χ e can be achieved at a resonant frequency ω≈3 2. In the general nonlinear case, we study how the intensity of incident light affects the effective dielectric function. Furthermore, the total effective refectances of s and p polarized light are investigated.更多还原