Omar ELMAZRIA is a Full Professor (Exceptional Class) at Université de Lorraine (UL) within Institut Jean Lamour (IJL UMR 7198) for research and Polytech Nancy for teaching. Born in 1968, he received his M.S. degree in Industrial computer science and opto-electronic conjointly from Universities of Metz, Nancy I, and the National Polytechnic Institute of Lorraine, in 1993 and his Ph.D degree in Electronic (evaluation and prediction of irradiation effects on semiconductors devices) in 1996 from Metz University, France. In 1997, he joined the University of Nancy I (now Université de Lorraine) as Associate Professor of Electronic and communication systems and as full Professor respectively in 1997 and 2003. He is also a member of the IUF (Institut Universitaire de France) and was guest Professor at several Universities around the world (Canad, China, USA). He was the head of Micro and Nansystems group and leader of Callot Project (Federator and interdisciplinary project in the field of nanosciences and nanodevices) within the Institut Jean Lamour and now leader of Piezoelectricity & Acoustic Topic within ISITE-LUE program (Loraine Université d’Exellence). His current research focuses on Surface acoustic waves (SAW) devices for communication systems and sensing applications. SAW filters and resonators based on layered structures including diamond, AlN, ZnO, were developed for high frequency applications (3-10 GHz range) and original SAW sensors for temperature, pressure, magnetic field, and showing the advantage to be passive (batteryless) wireless and/or packageless are demonstrated. Those promising sensors present a solution of choice in various fields such as monitoring in harsh environments or in biomedical applications. Prof. ELMAZRIA is currently the coordinator of ANR SALSA project aimed at the development of passive and wireless sensors for steel industry and operating up to 1000 ° C. He also manages several projects funded by ANR, DGA, ISITE, SATT GE for the development of wireless sensors for biomedical applications. He is the author and co-author of more than 160 international scientific articles, 4 international patents issued, and more than 120 communications in international conferences. He was a co-chair of Technical Program Committee (TPC) group 4 of IEEE International Ultrasonics Symposium and is a co-chair of IEEE ICEMI and member of technical or organization committees of several other international conferences. In 2017, he receive URSI-France medal from the International Union of Radio Science.
Abstract:Surface Acoustic Waves (SAW) Technology as 3 less sensors: Wireless, Batteryless and Packageless
Surface acoustic wave (SAW) devices, are key components in communication systems and are widely used as filters, delay lines or resonators. Because SAW devices are highly sensitive to external physical parameters and to any disturbance that may affect the velocity, distance travel or even the mode of wave propagation, they also offer new and very promising solutions in a wide range of applications including physical and chemical sensors. In addition of being small, simple and robust, these devices have the advantage of being batteryless (passive), wireless and packageless in specific configuration. The use of SAW filter facilities and standard components of RF communication make the production of SAW sensors and their reader units inexpensive if they are fabricated on a large scale.
The use of SAW devices as passive and wireless sensors allows them to operate in extreme conditions such as those with high levels of radiation, high temperatures up to 1000°C, or electromagnetic interference, in which no other wireless sensor can operate. This is obviously conditioned by the fact that the materials constituting the device can withstand these harsh conditions. Combined with flexible substrates, SAW sensors will find applications in the biomedical and welfare for a continuous monitoring of the human body’s parameters.
In this lecture, general principle of the SAW sensor in wired and wireless configurations will be developed and a review of recent works in our group mainly in the field of high temperature applications and magnetic field sensor.