THz spectroscopy with an absolute frequency scale by a QCL phase-locked to a THz frequency comb

Key Points

• THz spectroscopy achieves an absolute-frequency scale using a QCL phase-locked to a frequency comb, enhancing accuracy.
• Key findings indicate a precise measurement across a methanol line at 2.5 THz, allowing for better spectroscopic data.
• The analysis uses THz frequency comb technology with a QCL, promoting advancements in spectroscopy techniques for molecular analysis.
• Such advances may enable more accurate and reliable measurements in chemical and material sciences.