A Terahertz s-SNOM tip with integrated photoconductive emitter switch evaluated on an AFM-system platform

On-Chip Time-Domain Terahertz Spectroscopy of Superconducting Films below the Diffraction Limit

“…vdW heterostructures, often 10 μm or smaller, have a reduced cross-section with free-space THz beams, leading to a drastically diminished signal-to-noise ratio that precludes most experiments. Though THz near-field imaging techniques − can achieve extreme subwavelength resolution, they are often difficult to integrate into cryostats, have low excitation efficiency if standard far-field excitation techniques are used, and are limited to narrow bands of THz frequencies.…”