5 Key Takeaways

• 1

  The SPRATS system combines asynchronous optical sampling with a micrometer-scale probe for high-resolution THz spectroscopy.

• 2

  SPRATS achieves 100 MHz spectral resolution and 20 µm spatial resolution, addressing limitations of conventional THz setups.

• 3

  The system successfully studied a silicon dual-period grating, confirming predictions of field localization and phase distributions.

• 4

  SPRATS improves far-field resonance measurements by isolating signals from central device regions, reducing edge effects.

• 5

  This technology could enhance narrow-line width filters, THz sensors, and advance research in light-matter interactions.