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Advances in Photoacoustic Resonators and Sensors
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Advances in Photoacoustic Resonators and Sensors

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: 25 February 2026 | Viewed by 2522

Special Issue Editors

Prof. Dr. Bernd Baumann

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Guest Editor
Heinrich Blasius Institute of Physical Technologies, Hamburg University of Applied Sciences, Berliner Tor 21, 20099 Hamburg, Germany
Interests: photoacoustic resonators; optimization; numerical methods; sensor; quantum physics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Marcus Wolff

E-Mail Website
Guest Editor
Heinrich Blasius Institute of Physical Technologies, Hamburg University of Applied Sciences, Berliner Tor 21, 20099 Hamburg, Germany
Interests: sensor systems; photoacoustic spectroscopy; isotope-selective sensor; photoacoustic sensor
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The photoacoustic effect is an emerging technology that has sparked significant interest in the research field since an acoustic wave can be produced simply by the incidence of light on a material or tissue. This phenomenon has been extensively investigated, not only to perform photoacoustic imaging but also to develop highly miniaturized ultrasound probes that can provide biologically meaningful information.

Photoacoustic resonators and sensors have recently branched out to various fields of application, including liquid and gas sensing for environmental monitoring, multi-gas detection, leak detection, breath sensing, homeland security, and petrochemical exploration, leading researchers to design and develop sensor architectures for on-field applications.

This Special Issue of Sensors, “Photoacoustic Resonators and Sensors”, will focus on the design and experimental verification of new sensors based on photoacoustic spectroscopy, as well as papers that focus on their field-testing. Both reviews and original research articles will be published.

Prof. Dr. Bernd Baumann
Prof. Dr. Marcus Wolff
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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Published Papers (2 papers)

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9 pages, 2609 KiB  
Article
Photoacoustic Imaging for Image-Guided Gastric Tube Placement: Ex Vivo Characterization
by Samuel John, Yeidi Yuja Vaquiz, Nikhila Nyayapathi, Loay Kabbani, Anoop Nilam, Jonathan F. Lovell, Nicole A. Wilson, Yan Yan and Mohammad Mehrmohammadi
Sensors 2025, 25(5), 1597; https://doi.org/10.3390/s25051597 - 5 Mar 2025
Viewed by 761
Abstract
Over 250,000 gastrostomy tubes (G-tubes) are placed annually in the United States. Percutaneous endoscopic gastrostomy (PEG) is the most widely used clinical method for placing G-tubes within the stomach. However, endoscope detectability is limited due to the scattering of light by tissues. Poor [...] Read more.
Over 250,000 gastrostomy tubes (G-tubes) are placed annually in the United States. Percutaneous endoscopic gastrostomy (PEG) is the most widely used clinical method for placing G-tubes within the stomach. However, endoscope detectability is limited due to the scattering of light by tissues. Poor organ visibility and low sensitivity of the palpation techniques cause blind needle insertions, which cause colon/liver perforations, abdominal bleeding, and gastric resections. Additionally, imaging artifacts and the poor distinguishability between water-filled tissues make ultrasound (US) imaging-based techniques incompatible with G-tube placement. The risk of ionizing radiation exposure and the confinement of fluoroscopy to radiology suites limits its bedside utility in patients. Considering these limitations, we propose to design a safe, point-of-care integrated US and photoacoustic (PA) imaging system for accurate G-tube placement procedures, for a broad spectrum of patients, and to characterize the system’s effectiveness. Our proposed technology utilizes a clinically safe contrast agent and a dual-wavelength approach for precise procedures. Our ex vivo tissue studies indicated that PA imaging accurately differentiates the different organs at specific wavelengths. Our characterization studies revealed that PA imaging could detect lower concentrations of Indocyanine Green (ICG) dye coating the colon wall, minimizing the risk of ICG dye-related toxicity and providing safer G-tube placements. Full article
(This article belongs to the Special Issue Advances in Photoacoustic Resonators and Sensors)
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16 pages, 6577 KiB  
Article
An Acoustic Sensor System to Measure Aeolian Ripple Morphology and Migration Rates
by Pei Zhang, Jinsu Bae, Eric J. R. Parteli, Diane Sherman and Douglas J. Sherman
Sensors 2024, 24(20), 6555; https://doi.org/10.3390/s24206555 - 11 Oct 2024
Viewed by 1020
Abstract
Acoustic distance sensors have a long history of use to detect subaqueous bedforms. There have been few comparable applications for aeolian bedforms such as ripples. To address this, we developed a simple and reliable apparatus comprising a pair of distance sensors, a bracket [...] Read more.
Acoustic distance sensors have a long history of use to detect subaqueous bedforms. There have been few comparable applications for aeolian bedforms such as ripples. To address this, we developed a simple and reliable apparatus comprising a pair of distance sensors, a bracket upon which they are mounted, and a base upon which the bracket can slide. Our system relies on two Senix Corporation (Hinesburg, VT, USA), ToughSonic® model 14-TSPC-30S1-232 acoustic distance sensors: one to measure surface elevation changes (in this case, ripple morphology) and a second to measure horizontal location. The ToughSonic® vertical resolution was 0.22 mm and the horizontal scan distance was about 0.60 m with a locational accuracy of 0.22 mm. The measurement rate was 20 Hz, but we over-sampled at 1 KHz. Signal processing involves converting volts to meters, detrending the data, and removing noise. Analysis produces ripple morphologies and migration rates that conform with independent measurements. The advantages of this system relative to terrestrial laser scanning or structure from motion are described. Full article
(This article belongs to the Special Issue Advances in Photoacoustic Resonators and Sensors)
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