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Single transparent piezoelectric detector for optoacoustic sensing—design and signal processing

verfasst von
Elias Blumenröther, Oliver Melchert, Jonas Kanngießer, Merve Wollweber, Bernhard Roth
Abstract

In this article, we present a simple and intuitive approach to create a handheld optoacoustic setup for near field measurements. A single piezoelectric transducer glued in between two sheets of polymethyl methacrylate (PMMA) facilitates nearfield depth profiling of layered media. The detector electrodes are made of indium tin oxide (ITO) which is both electrically conducting as well as optically transparent, enabling an on-axis illumination through the detector. By mapping the active detector area, we show that it matches the design form precisely. We also present a straightforward approach to determine the instrument response function, which allows to obtain the original pressure profile arriving at the detector. To demonstrate the validity of this approach, the measurement on a simple test sample is deconvolved with the instrument response function and compared to simulation results. Except for the sputter instrumentation, all required materials and instruments as well as the tools needed to create such a setup are available to standard scientific laboratories.

Organisationseinheit(en)
Hannoversches Zentrum für Optische Technologien (HOT)
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Institut für Quantenoptik
Externe Organisation(en)
Laser Zentrum Hannover e.V. (LZH)
Typ
Artikel
Journal
Sensors (Switzerland)
Band
19
ISSN
1424-8220
Publikationsdatum
01.05.2019
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Analytische Chemie, Atom- und Molekularphysik sowie Optik, Biochemie, Instrumentierung, Elektrotechnik und Elektronik
Elektronische Version(en)
https://doi.org/10.3390/s19092195 (Zugang: Offen)
https://doi.org/10.15488/4851 (Zugang: Offen)