Open AccessElectromechanical film as a photoacoustic transducer
Author(s) -
Albert Manninen,
Johan Sand,
Jaakko Saarela,
Tapio Sorvajärvi,
Juha Toivonen,
Rolf Hernberg
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.016994
Subject(s) - transducer , materials science , detector , optics , photoacoustic imaging in biomedicine , attenuation coefficient , absorption (acoustics) , photoacoustic effect , photoacoustic spectroscopy , acoustics , physics
An electromechanical film, EMFi, is utilized as a transducer in a photoacoustic (PA) gas sensor. The film is a sensitive acoustic transducer, it is easily formable, and it exhibits a wide frequency response regardless of its large surface area. As a demonstration of its capabilities, the EMFi-based PA detector is used to measure NO(2) with pulsed excitation at 436 and 473 nm. The minimum detectable absorption coefficient is extrapolated to be 5.10(-7) cm(-1). Improvements for EMFi-based PA detector are discussed.