PROMETHEUS-THz

Strong‑Field Terahertz Spectroscopy System

  • Peak electric field > 10 MV/cm, guaranteed ≥ 8 MV/cm — capable of directly driving materials rather than merely probing them
  • 1.0 – 4.6 THz flat‑top spectrum, 10 dB in‑band across 2.2 octaves, with uniform signal strength over the full bandwidth
  • Pulse energy 4 µJ, pump‑to‑THz conversion efficiency 0.6 – 0.9%
  • Two focal stations at 0.14 / 0.26 mm — balancing tight focusing with ample space for sample manipulation
Request Quote
PROMETHEUS THZ — Y-LASER

PROMETHEUS‑THz Strong‑Field Terahertz Spectroscopy System integrates a femtosecond Yb laser, a few‑cycle nonlinear pulse compressor, and a strong‑field terahertz time‑domain spectrometer into a single factory pre‑aligned platform. It is designed for research groups that need field‑driven, nonlinear, and high‑dynamic‑range THz spectroscopy — experiments that previously required researchers to build and maintain the entire optical path themselves. This system moves that work upstream to the factory.

What truly sets this source apart is its spectral shape. Most THz sources exhibit a sharp peak at a single frequency with rapid roll‑off on both sides, so a single measurement shows a strong signal at the peak while the rest of the spectrum is buried in noise. The output of PROMETHEUS‑THz, however, stays within 10 dB of its peak across the entire 1.0–4.6 THz range — a bandwidth of 3.6 THz spanning 2.2 octaves — and arrives at the sample as a single pulse. A single scan therefore yields uniformly high‑quality data across the full bandwidth, with no favored frequencies.

On the driving end, a Yb‑doped HELIOS‑HE femtosecond laser provides up to 2 mJ of pump energy at 10–100 kHz, which is then compressed by a HYPERION‑G‑HE gas multi‑pass cell to a typical 29.2 fs with compression efficiency better than 90%. The output is a circular, single‑lobe beam rather than the butterfly distribution commonly seen with OPA‑driven sources. Only a clean circular beam can be focused into a compact, symmetric focal spot — the prerequisite for converting pump energy into peak THz field strength. When the peak electric field exceeds 10 MV/cm, its magnitude becomes comparable to the internal field binding electrons to atoms — the pulse no longer merely observes the sample, it drives it.