New developments in THz quartz enhanced photoacoustic spectroscopy

Vincenzo Spagnolo; Pietro Patimisco; Angelo Sampaolo; Marilena Giglio; Miriam S. Vitiello; Gaetano Scamarcio; Frank K. Tittel

doi:10.1117/12.2236217

26 September 2016 New developments in THz quartz enhanced photoacoustic spectroscopy

Vincenzo Spagnolo, Pietro Patimisco, Angelo Sampaolo, Marilena Giglio, Miriam S. Vitiello, Gaetano Scamarcio, Frank K. Tittel

Author Affiliations +

Proceedings Volume 9934, Terahertz Emitters, Receivers, and Applications VII; 99340C (2016) https://doi.org/10.1117/12.2236217
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

We will report on new developments of quartz-enhanced photo-acoustic (QEPAS) sensor employing THz quantum cascade laser (QCLs). The extension of the QEPAS technique in the THz range was made possible by the realization of custom made QTFs. With the aim to improve the QTF acousto-electric transduction efficiency, we designed and realized new QTF designs. A detailed analysis of the quality factor, the resonance frequency and the electrical resistance of custom quartz tuning forks (QTFs) with different geometrical parameters is reported. The custom QTFs were employed in QEPAS sensors using THz QCLs as the laser excitation sources and targeting CH₃OH and H₂S. Minimum detection limits of a few tens of ppb and normalized noise equivalent absorption factors down to 3.75×10^-11 cm^-1W/Hz½ were achieved.

Conference Presentation

Citation Download Citation

Vincenzo Spagnolo, Pietro Patimisco, Angelo Sampaolo, Marilena Giglio, Miriam S. Vitiello, Gaetano Scamarcio, and Frank K. Tittel "New developments in THz quartz enhanced photoacoustic spectroscopy", Proc. SPIE 9934, Terahertz Emitters, Receivers, and Applications VII, 99340C (26 September 2016); https://doi.org/10.1117/12.2236217

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