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
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.
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
The PolySense team has just published a new article on Sensors reporting on a the realization of a dual-gas sensor based on the combination of a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and an electronic hygrometer was realized for the simultaneous detection of methane (CH4) and water vapor (H2O) in air. The sensor was tested by Leggi di piùNew Publication on Sensors[…]
The PolySense team has just published a new article on Applied Science reporting on a study of the front-end electronics for quartz tuning forks (QTFs) employed as optoacoustic transducers in quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing. We demonstrated that the fully dierential voltage amplifier allows for a nearly doubled SNR with respect to the typically used single-ended Leggi di piùNew Publication on Applied Science[…]
The PolySense team has just published a new article on Applied Science reporting on the realization of a quartz-enhanced photoacoustic spectroscopy (QEPAS)-based ethane gas sensor operating in the near-IR and employing a pigtailed laser diode emitting at ~1684 nm as the exciting light source. The minimum ethane concentration detectable using a 100 ms lock-in integration time achieving Leggi di piùNew Publication on Applied Science[…]
The PolySense team has just published a new article on Applied Physics Letters reporting on an optical gas sensing technique based on in-plane quartz-enhanced photoacoustic spectroscopy (IP-QEPAS). IP-QEPAS sensor results in a signal more than 40 times higher than that measured with the standard in-plane QEPAS conﬁguration, conﬁrming the potentiality of this approach. The following Leggi di piùNew Publication on Applied Physics Letters[…]
The PolySenSe Team has visited the THORLABS Headquarter to discuss future development exploiting the New Lab facility that will open soon @ the Physics department of Bari.
The PolySense team has just published a new article on Photoacoustics Journal reporting on a comparison between piezoelectric and interferometric readouts of vibrations in quartz tuning forks (QTFs) for quartz-enhanced photoacoustic (QEPAS) trace gas detection. The following link provide access to the article. http://polysense.poliba.it/wp-content/uploads/2020/01/113_Piezo-interferometric-QEPAS_Photoaocustics_2020.pdf
The PolySense team has just published a new article on Photoacoustics Journal reporting on multi-gas QEPAS detection of methane and nitrous oxide using a quantum cascade laser array. A methane detection sensitivity of 200 ppb and 60 ppb for nitrous oxide were achieved with a 10 s lock-in integration time. The following link provide access Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Applied Physics Letters reporting on a highly sensitive trace gas sensor based on light-induced thermoelastic spectroscopy (LITES) and a custom quartz tuning fork (QTF). A minimum detection limit of 325 ppb was achieved at an integration time of 1 s, nearly one order of magnitude Leggi di piùNew Publication on Applied Physics Letters[…]
The PolySense team has just published a new article on Optics Express reporting on the realization of a novel grooved quartz tuning fork detector for Quartz-enhanced photoacoustic sensing. Rectangular grooves were carved on each prong surface of the QTF to reduce the electrical resistance and enhance the piezoelectric effect without affecting the resonance frequency and Leggi di piùNew Publication on Optics Express[…]
Publication of a Chapter on QEPAS on the Elsevier book: Mid-infrared Optoelectronics Materials, Devices, and Applications
Vincenzo Spagnolo and Pietro Patimisco from the PolySense team have contributed with a full chapter on QEPAS technology in an Elsevier -Woodhead Publishing Series in Electronic and Optical Materials book entitled: Mid-infrared Optoelectronics Materials, Devices, and Applications, 1st edition. The following link provide access to the article: http://polysense.poliba.it/wp-content/uploads/2019/11/Elsevier-mid-infrared-optoelectronics_qepas-chapter.pdf