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November 11, 2024 at 12:52 pmchenymjxzsSubscriber
我是在做一个超透镜项目,超透镜只对左旋聚焦,透镜焦点处有一个镜子,光聚焦在经过镜子反射后,在经过超透镜,从理论上看应该是不会聚焦到。现在我想在FDTD中验证这一结果,目前遇到的问题是我不知道如何判断反射回来的光是否为平行光。
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November 12, 2024 at 8:17 pmGuilin SunAnsys Employee
反射镜也包括在FDTD仿真中的话,你可以在光源后面加一个监视器,然后做远场投射看看吧,看看发散角如何。但是,因为入射光是平面波(近似使用),外面的PEC光栏反射和衍射都影响远场投射结果。
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November 12, 2024 at 8:34 pmGuilin SunAnsys Employee
以后请发帖到中文Photonics论坛 Photonics – Chinese
为了减小光阑反射和PML造成的衍射,你可以做两个仿真,一个是有超透镜,另外一个没有,将它们的远场的场相减后再看强度可以最大限度地看到由超透镜+反射镜反射回来的光的平行性。你可能需要用脚本,farfieldpolar https://optics.ansys.com/hc/en-us/articles/360034930713-farfieldpolar3d-Script-command
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