Time-domain optical pump — Terahertz probe spectroscopic imager for carrier lifetime measurements in the pico- to microsecond regime

Abstract

We demonstrate a spatially resolved method to measure carrier lifetimes and carrier distributions based on optical pump — terahertz probe spectroscopy. The pump-probe delay range spans from 600 ps to 200 μs. The spatial resolution is sub-wavelength being better than 50 μm (≺ λ center /6 at 1THz).