Spatial-resolved asynchronous-sampling THz spectroscopy overcomes trade-off between high spectral/ high spatial resolution

https://www.eurekalert.org/news-releases/1111836

"integrates: (1) asynchronous optical sampling using 2 lasers, slightly different frequencies providing high-speed scanning/ 100 MHz spectral resolution identifying chemical signatures, (2) photoconductive probe, 20 µm spatial resolution for near-field detection observing how light interacts with surfaces... using small detection area, filteres out noise from samples' edges, providing cleaner data... verifies light-matter interaction models in real-time... wireless communications, chemical sensors, nonlinear THz devices"