用于THz波段脉冲空间整形的滤波透镜的电磁场分析

A full electromagnetic analysis of a filter substrate lens for spatiotemporal terahertz pulse shaping

提出了一种结构新颖的用于THz波段的滤波透镜,其特点是将滤波和聚焦的性能结合在一起,从而能有效地在某个特定波段内聚焦THz脉冲的输出能量.设计了带通和带阻两种性能的滤波透镜,并用电磁场时域差分方法进行了数值研究,证明了设计的正确性.

A novel filter substrate lens for THz pulse is presented, which could efficiently couple the THz radiation in a desired frequency range into free space. The band-pass and band-stop filter lens is designed and studied by difference time method. The results show that the design is well supported by the theoretical analyses.