39 citations · 79 across the 8 of their papers we have counts for
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Sensitive multi-species photoacoustic gas detection based on mid-infrared supercontinuum source and miniature multipass cell
Tommi Mikkonen, Tuomas Hieta, Goëry Genty +1
We report multipass broadband photoacoustic spectroscopy of trace gases in the mid-infrared. The measurement principle of the sensor relies on supercontinuum-based Fourier transfor…
Enhancement of photoacoustic spectroscopy with sorption enrichment for ppt-level benzene detection
Juho Karhu, Tuomas Hieta
A real time trace gas detector for benzene is demonstrated. The measurement system takes an advantage of modest enrichment through short adsorption periods to reach a ppt-level det…
Cantilever-enhanced photoacoustic measurement of light-absorbing aerosols
Juho Karhu, Joel Kuula, Aki Virkkula +3
Photoacoustic detection is a sensitive method for measurement of light-absorbing particles directly in the aerosol phase. In this article, we demonstrate a new sensitive technique…
Sub-part-per-trillion level detection of hydrogen fluoride by cantilever-enhanced photo-acoustic spectroscopy
Teemu Tomberg, Markku Vainio, Tuomas Hieta +1
We present a highly sensitive hydrogen fluoride detector based on simple cantilever-enhanced photo-acoustic spectroscopy. A noise equivalent concentration of 5 parts-per-trillion w…