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研究了金属板上下两个表面内侧都周期性地嵌入电介质小球体系的透射和吸收性质.结果显示:对于嵌入深度很小的电介质小球,电磁波可通过隧穿效应进入到电介质小球内,并以腔体本征模式的形式存在.当嵌入深度很小时,周期排列的电介质小球会对金属表面做有效的周期性调制,使体系在特定的频率出现金属表面等离子激元.当腔体本征模式与金属表面等离子激元模式的频率相近时,它们之间的耦合将使两种电磁模式大幅度地增强,从而使上层的电介质小球内具有非常强的电磁场.这些高强度的电磁场有相当一部分可通过隧穿效应进入到下层的电介质小球内,并通过与上表面类似的方式将电磁场引导至金属板外,形成强烈的透射平面电磁波,最终导致体系的透射率大幅度增高.
The transmission and absorption properties of periodically embedded dielectric spheres on the inner and outer surfaces of both metal plates are studied.The results show that the electromagnetic waves can penetrate into the dielectric spheres through the tunneling effect, And exists in the form of cavity intrinsic mode.When the embedding depth is very small, the periodic arrangement of the dielectric pellets will make effective periodic modulation on the metal surface, so that the system appears at a specific frequency of metal surface plasmon.When the cavity When the eigenmodes are close to the frequency of the metal surface plasmon modes, the coupling between them will greatly enhance the two electromagnetic modes, resulting in a very strong electromagnetic field in the upper dielectric pellets. These high-intensity electromagnetic fields A considerable portion of the tunneling effect can penetrate into the underlying dielectric pellet and direct the electromagnetic field to the metal plate through a similar manner as the top surface to form a strong transmission plane electromagnetic wave that ultimately results in a substantial increase in the transmittance of the system.