We report on the first demonstration of a quartz enhanced photo-acoustic (QEPAS) sensor in the Terahertz (THz) range. The sensor is based on a QCL emitting at 3.93 THz and a customized quartz tuning fork. For methanol detection we reached a normalized noise-equivalent absorption of 2×10 -10 cm -1 W/Hz ½ comparable with the best result of mid-IR QEPAS.
THz quantum cascade laser-based quartz enhanced photo-acoustic sensor
Vincenzo Spagnolo;Pietro Patimisco;Angelo. Sampaolo;
2013
Abstract
We report on the first demonstration of a quartz enhanced photo-acoustic (QEPAS) sensor in the Terahertz (THz) range. The sensor is based on a QCL emitting at 3.93 THz and a customized quartz tuning fork. For methanol detection we reached a normalized noise-equivalent absorption of 2×10 -10 cm -1 W/Hz ½ comparable with the best result of mid-IR QEPAS.File in questo prodotto:
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