THz quantum cascade laser-based quartz enhanced photo-acoustic sensor

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/...

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Bibliographic Details
Main Authors: Spagnolo, Vincenzo, Borri, Simone, Patimisco, Pietro, Sampaolo, Angelo, Calabrese, Paolo P., Beere, Harvey E., Ritchie, David A., Vitiello, Miriam S., Scamarcio, Gaetano
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Frequency measurement
Methanol
Quantum cascade lasers
Resonant frequency
Sensitivity
Vibrations
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Summary: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.
ISSN:2162-2027
DOI:10.1109/IRMMW-THz.2013.6665595