Monolithic Echo-less Photoconductive Switches for High-Resolution Terahertz Time-domain Spectroscopy

摘要

We demonstrate iPC switches for THz pulse detection and generation that totally suppresses unwanted echoes. This is realized through a multilayer LT-GaAs structure and combined with a metal plane buried at a subwavelength depth below the iPC surface, effectively realizing a THz cavity that prevents echo generation.