THz emission spectroscopy developed at UIUC is used to investigate spin current generation in the antiferromagnetic metal FeRh under ultrafast laser excitation. The transient spin current in FeRh can be extracted from the emitted THz field. Developing viable platforms for the transduction between charge and spin current is crucial for spintronic based electronic devices. The Illinois MRSEC's work investigates FeRh as one such platform.