Sep 2026
Sub-ppm Ammonia Sensing via Terahertz Phase Modulation in Porous Glass with a Chaotic Laser Diode
The growing demand for noncontact sensing of environmental pollutants and toxic gases has increased interest in low-cost, compact, and easy-to-operate optical gas-sensing systems. In this study, we propose a low-concentration ammonia (NH3) detection method based on terahertz time-domain spectroscopy (THz-TDS) using a...
Yuan-Hao Zeng, Kosaku Kato, K. Komatsu et al.
· ACS Applied Optical Material... · 0 citations