Share Email Print

Proceedings Paper

New developments in THz quartz enhanced photoacoustic spectroscopy
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper 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.

Paper Details

Date Published: 26 September 2016
PDF: 8 pages
Proc. SPIE 9934, Terahertz Emitters, Receivers, and Applications VII, 99340C (26 September 2016); doi: 10.1117/12.2236217
Show Author Affiliations
Vincenzo Spagnolo, Univ. Politecnico di Bari (Italy)
Pietro Patimisco, Rice Univ. (United States)
Angelo Sampaolo, Univ. Politecnico di Bari (Italy)
Rice Univ. (United States)
Marilena Giglio, Univ. Politecnico di Bari (Italy)
Miriam S. Vitiello, CNR-Nanoscienze and Normale Superiore (Italy)
Gaetano Scamarcio, Univ. Politecnico di Bari (Italy)
Frank K. Tittel, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 9934:
Terahertz Emitters, Receivers, and Applications VII
Manijeh Razeghi; Alexei N. Baranov; John M. Zavada; Dimitris Pavlidis, Editor(s)

© SPIE. Terms of Use
Back to Top