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Updated: Jun 20, 2026
Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
Electromechanical film as a photoacoustic transducer
Albert Manninen1, Johan Sand, Jaakko Saarela
1Optics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland. albert.manninen@tut.fi
Abstract:
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.
