Our Research activities
Compact acoustic detection modules
Realization of compact acoustic detection module including a custom-made quartz tuning fork and micro-resonator system, optical access via two windows and gas in and out connections.
Custom-made tuning forks and micro-resonators
Custom-made quartz tuning fork properly designed and realized to offer high performance for QEPAS sensors, in terms of quality factor and electrical charges collection efficiency.
Fiber-coupled mid-IR QEPAS Sensors
Fiber-optic components are key enabling technologies to improve the robustness and effectiveness of QEPAS sensors in terms of flexible beam guidance and compactness.
Cavity-Enhanced QEPAS Sensors
Ultra-sensitive and selective QEPAS sensors combined with high-finesse optical cavities can increase the detection sensitivity up to two orders of magnitude.
THz QEPAS SENSORS
High sensitivity THz molecular spectroscopy is crucial for the study of chemical processes related to ozone depletion and global warming, as well as direct identification of explosives and drugs.
EU Project OPTAPHI 2020-2023
The OPTAPHI Postgraduate Training Network aims to train doctoral students in the complementary fields of advanced spectroscopy and integrated optics. Specifically, the focus is on the methods of photo-acoustic and photo-thermal spectroscopy, and their integration with compact semiconductor lasers.
EU PROJECT PASSEPARTOUT 2021-2024
PASSEPARTOUT will advance the development and deployment of miniature, optical based sensors based on Quartz Enhanced Photo-acoustic Spectroscopy and Photo-Thermal Interferometry for a wide range of ambient pollutants. PASSPARTOUT will realize the first 3D mobile optical gas analyser network capable of operating in an urban area exploting on drone-mounted, vehicle-mounted and stationary sensors. (NOx, SO2, NH3, CH4, CO, CO2) and black carbon within urban areas, around landfills and seaports with extremely high precision and good spatial resolution.
Quartz tuning forks photodetectors
Quartz tuning forks as a narrow-bandwidth (∼1 Hz), fast-response (tens of kHz), broadband, high-responsivity infrared photodetectors, suitable for tunable laser-based absorption spectroscopy.
Trace gas sensors are the heart of any monitoring system in industrial and urban areas. Real-time and in-situ QEPAS-based monitoring systems are crucial to ensure an environmentally sustainable territorial development.
Exhaled breath biomarkers have particular clinical appeal offering non-invasive medical diagnostics. Dedicated QEPAS sensors can be used as repeatable, continuous and real-time breath analysis tool.
Gas Leak detection is a critical problem for several applications requiring hermetically closed areas. QEPAS-based leak sensors are several orders of magnitude more sensitive than a bubble test or helium sniffer.
Portable Quartz enhanced photoacoustic sensors (QEPAS) system are capable to detect in situ methane, ethane, propane and butane in gas phase, with detection limits in the few part-per-million concentration range.
Monitoring of hotspot areas
Certain chemicals can be used in the illicit manufacture of explosives or to cause harm. Quartz enhanced photoacoustic sensors (QEPAS) system are capable to detect toxic gases and explosive precursors down to few part-per-million concentration range.
Vincenzo Luigi Spagnolo
Vittorio M. N. Passaro
Ada Cristina Ranieri
Michele Di Gioia
Raffaele De Palo
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on the performance of quartz tuning fork (QTF) based laser spectroscopy sensing employing multiple QTFs. To avoid that resonance frequency mismatching of the QTFs degrades the sensor performance, two types of resonance frequency matching method are here proposed. Without regulation, Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on the realization of a compact quartz-enhanced photoacoustic sensor for ppb-level ambient NO2 detection exploiting a blue laser diode. A minimum detectable concentration (1σ) of 7.3 ppb with an averaging time of 1 s is achieved, which can be further improved to Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on the realization of an on-beam quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a custom quartz tuning fork (QTF) with a resonance frequency of 28 kHz, acting as a photoacoustic transducer. H2O, C2H2 and CO2 were detected for a long time and Leggi di piùNew Publication on Photoacoustics Journal[…]
On December 3rd 2021, the United States Consul for the press and culture of the Consulate General of Naples, Karen Schinnerer and her assistants visited the “PolySense” laboratory.
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on the realization, calibration, and test outdoor of a 19-inches rack sized QEPAS trace gas sensor designed for real-time carbon monoxide monitoring in ambient air. The sensor was tested outdoor in a trafficked urban area for several hours providing Leggi di piùNew Publication on Photoacoustics Journal[…]
Quartz tuning forks can be cost-effective means of trace gas detection Alane Lim Inexpensive method to detect gas molecules via infrared radiation absorption reported.
The PolySense team has just published a new article on Applied Physics Review journal (Impact Factor 19.162) reporting on the performance of a custom quartz tuning fork used as a sensitive and broadband infrared photodetector for absorption spectroscopy. A spectrally flat responsivity of ~2.2 kV/W in the spectral range 1.65 µm-10.34 µm was demonstrated, corresponding to a Leggi di piùNew Publication on Applied Physics Review[…]
The PolySenSe team is proud to annouce that dr. Andrea Zifarelli has been the recipient of the Sensors MDPI award for the best presentation at the International School of Quantum Electronics, 64th course, Progress in Photoacoustic & Photothermal Phenomena, presenting a talk on “Partial least squares regression as statistical tool for quartz-enhanced photoacoustic spectroscopy to retrieve Leggi di piùSensors MDPI Award won by Dr. Andrea Zifarelli[…]
Special Issue “New Prospects in Photothermal and Photoacoustic Techniques for Sensing and Imaging Applications”
Prof. Vincenzo Spagnolo, Prof. Roberto Li Voti , Prof. Angelo Sampaolo and Dr. Giansergio Menduni are currently accepting submissions for the Special Issue titled “”New Prospects in Photothermal and Photoacoustic Techniques for Sensing and Imaging Applications”, which has been published in Sensors Journal MDPI (Impact Factor: 3.576). You can find the Call for Papers at the following link: Leggi di piùSpecial Issue “New Prospects in Photothermal and Photoacoustic Techniques for Sensing and Imaging Applications”[…]
The PolySense team has just published a new review manuscript on Analytica Chimica Acta journal (IF 6.558) reporting on the implementation of the QEPAS technique for multi-gas detection in three main areas of applications: i) multi-gas trace sensing by exploiting non-interfering absorption features; ii) multi-gas detection dealing with overlapping absorption bands; iii) multi-gas detection in fluctuating Leggi di piùNew publication on Analytica Chimica Acta[…]