Show simple item record

dc.contributor.authorZheng, Huadan
Dong, Lei
Sampaolo, Angelo
Patimisco, Pietro
Ma, Weiguang
Zhang, Lei
Yin, Wangbao
Xiao, Liantuan
Spagnolo, Vincenzo
Jia, Suotang
Tittel, Frank K.
dc.date.accessioned 2017-05-19T19:09:39Z
dc.date.available 2017-05-19T19:09:39Z
dc.date.issued 2016
dc.identifier.citation Zheng, Huadan, Dong, Lei, Sampaolo, Angelo, et al.. "Overtone resonance enhanced single-tube on-beam quartz enhanced photoacoustic spectrophone." Applied Physics Letters, 109, no. 11 (2016) AIP Publishing LLC: http://dx.doi.org/10.1063/1.4962810.
dc.identifier.urihttps://hdl.handle.net/1911/94288
dc.description.abstract A single-tube on-beam quartz enhanced photoacoustic spectroscopy (SO-QEPAS) spectrophone, which employs a custom-made quartz tuning fork (QTF) having a prong spacing of 700 μm and operating at the 1st overtone flexural mode, is reported. The design of QTF prong geometry allows the bare QTF to possess twice higher Q-factor values for the 1st overtone resonance mode falling at ∼17.7 kHz than in the fundamental resonance mode at ∼2.8 kHz, resulting in an 8 times higher QEPAS signal amplitude when operating in the 1st overtone resonance mode. Both the vertical position and length of the single-tube acoustic micro-resonator (AmR) were optimized to attain optimal spectrophone performance. Benefiting from the high overtone resonance frequency and the quasi 1st harmonic acoustic standing waves generated in the SO-QEPAS configuration, the AmR length is reduced to 14.5 mm. This allows the realization of compact spectrophone and facilitates the laser beam alignment through the QTF + AmR system. The signal enhancement in the overtone resonance mode and the high acoustic coupling efficiency between the AmR and QTF in the SO-QEPAS configuration yields an overall sensitivity enhancement factor of ∼380 with respect to the bare custom QTF operating in the fundamental resonance mode.
dc.language.iso eng
dc.publisher AIP Publishing LLC
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Overtone resonance enhanced single-tube on-beam quartz enhanced photoacoustic spectrophone
dc.type Journal article
dc.citation.journalTitle Applied Physics Letters
dc.citation.volumeNumber 109
dc.citation.issueNumber 11
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1063/1.4962810
dc.type.publication publisher version
dc.citation.articleNumber 111103


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record