Multilayer Terahertz Imaging at Kilohertz Pixel Rate

We present our recent results on multilayer terahertz imaging at 1.6 kHz pixel rate employing an ECOPS (electronically controlled optical sampling) based terahertz time-domain spectroscopy system. Using a rotating sample and a translating measurement head, we image individual layer thicknesses on metallic and nonmetallic disks of 300 mm diameter in less than 3 minutes.