基于阻抗可调的变换光学理论，设计了波导传感器中二维平面波和柱面波相互转换的光学结构。通过在虚拟空间设置合适的阻抗函数，变换介质边界上的反射得到有效消除，实现了高效的平面波到柱面波转换；转换效率将随着输入波束宽度的增加而提高。四个相似转换结构的组合，可实现高效柱面波-平面波转换，与采用传统的变换光学设计比较，基于阻抗可调变换光学理论的设计，数值模拟表明转换效率可提高约百分之六。%Based on impedance-tunable transformation optics,the optical design of two dimensional conversion be⁃tween cylindrical waves and plane waves is realized in waveguide sensor. By tuning impedance coefficients in the original space to remove the reflections at the boundary,a high efficient plane-to-cylindrical-wave conversion is ob⁃tained through calculating the reflection coefficient of the waves at the boundary;the efficiency can be enhanced with increasing the beam width. Four similar structures are designed for a high-efficiency cylindrical-to-plane-wave conversion,one can obtain a higher efficiency by using impedance-tunable transformation optics compared with con⁃ventional transformation optics,and the numerical simulations show that increased efficiency is about six percent.
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