Parts-per-trillion-level detection of nitrogen dioxide by cantilever-enhanced photo-acoustic spectroscopy

Jari Peltola, Tuomas Hieta (Corresponding Author), Markku Vainio

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    32 Citations (Scopus)


    We present a simple and highly sensitive cantileverenhanced photo-acoustic sensor for detection of nitrogen dioxide. A noise equivalent detection limit of 50 parts-per-trillion in 1 s is demonstrated. The limit was reached with an average optical power of 4.7 W using a continuous-wave laser at 532 nm. The achieved normalized noise equivalent absorption coefficient was 2.6 ¡Á 10.10 Wcm.1 Hz.1 M2.
    Original languageEnglish
    Pages (from-to)2933-2936
    JournalOptics Letters
    Issue number13
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed


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