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.
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
Stefano Dello Russo
Ada Cristina Ranieri
Michele Di Gioia
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[…]
Polysense is proud to communicate that the manuscript: “Multi-pass quartz-enhanced photoacoustic spectroscopy-based trace gas sensing” doi.org/10.1364/OL.418520 have been listed among the top 15 cited manuscripts published on Optics Letters since 2020. Note that our manuscript is the only one in the list published in 2021. The following link provide access to the article. http://polysense.poliba.it/wp-content/uploads/2021/02/128_Multipass-QEPAS_OL_2021.pdf
The PolySense team has just published a new article on Applied Science reporting on the theoretical analysis and experimental investigation of the influence of gas pressure on resonance properties, namely, the quality factor and resonance frequency, of a T-shaped quartz tuning fork (QTF). The results show that acoustic coupling is strongly influenced by air pressure, Leggi di piùNew Publication on Applied Science[…]
The President of the Italian Portal Autority of the south Adriatic Sea has visited the PolySenSe LAb
The President of the port authority of the south Adriatic Sea Ugo Patroni Griffi today visited the PolySense Laboratories as part of future collaborations regarding the control and monitoring of air quality in port areas.
The PolySense team has just published a new article on OSA Optics Express Journal reporting on a novel an ultra-highly sensitive light-induced thermoelastic spectroscopy (LITES)-based carbon monoxide (CO) sensor exploiting custom quartz tuning forks (QTFs) as a photodetector, a multi-pass cell and a mid-infrared quantum cascade laser (QCL). At an integration time of 200 ms a minimum Leggi di piùNew Publication on Optics Express[…]
The PolySense team is proud to announce that the team member dr. Marilena Giglio received the Sensors 2021 travel award. https://www.mdpi.com/…/awards.pdf/0/pdf_3_2021_7_award.pdf
The PolySense team has just published a new article on OSA Optics Letters Journal reporting on a novel multi-pass quartz-enhanced photoacoustic spectroscopy-based trace gas sensor . The multi-pass configuration allows the laser beam to pass through the QTF prong spacing six times. Compared to a conventional QEPAS measurement, the MP-QEPAS technique provided an enhancement of signal Leggi di piùNew Publication on Optics Letters[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 5.87) reporting on a comparison between Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) and Photothermal Spectroscopy (PTS). Compact QEPAS and PTS detection modules were realized and integrated in a gas sensor system for detection of carbon monoxide (CO). Performance was compared and ultimate detection limits Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Journal of Lightwave Technology (IF 4.288) reporting on a new modelling of QEPAS sensors with the optical components semi-integrated with the tuning fork. The design here proposed paves the way to a further level of miniaturization, integration and deployment of QEPAS sensors for application like mobile and on-drone Leggi di piùNew Publication on Journal of Lightwave Technology[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 5.87) reporting on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for hydrogen sulfide (H2S) detection, exploiting a liquid-nitrogen-cooled THz quantum cascade laser (QCL) operating in pulsed mode. A QEPAS record sensitivity for H2S detection in the THz range of 360 part-per-billion in volume Leggi di piùNew Publication on Photoacoustics Journal[…]