Abstract

We have developed a method for detecting broadband terahertz (THz) pulses using a lithium niobate (LN) crystal in a non-collinear phase matching geometry by parametric process. Counter-intuitively, our results show the ability to spatially separate the converted broadband signal with a resolution of a few GHz, thus demonstrating the parametric spectrometer function. This result is remarkable and will have a significant impact on the advanced detection of THz light, whether for spectroscopy or ultrafast transmission of information.

© 2023 The Author(s)