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设计了一种基于有源介质的增益辅助无损耗条形混合表面等离子体波导。利用有限元算法,理论分析了混合表面等离子体波导在通信波段的传输特性。结果表明,此波导在突破衍射极限的亚波长光场限制下可实现约10μm的传输长度。在混合表面等离子体波导中引入泵浦增益后,可以实现光信号的无损耗传输,从而实现在亚波长光场限制下的无限长传输。此类混合表面等离子体波导兼具结构简单和易于制备等优点,在光互联、光子集成电路、光通信和光信息处理等方面有重要的潜在应用。
A gain assisted non-destructive strip hybrid surface plasmon waveguide based on active medium was designed. Using the finite element method, the transmission characteristics of the hybrid surface plasmon waveguides in the communication band are theoretically analyzed. The results show that this waveguide can achieve a transmission length of about 10μm under the limitation of subwavelength field of diffraction limit. After introducing the pump gain into the hybrid surface plasmon waveguide, lossless transmission of the optical signal can be realized, so as to realize infinite transmission under the limitation of the sub-wavelength optical field. Such hybrid surface plasmon waveguides have the advantages of simple structure and easy preparation, and have important potential applications in optical interconnection, photonic integrated circuits, optical communications and optical information processing.