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Abdelkrim Talbi - IEEE Xplore Author Profile

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In this article, we introduce a gas sensor concept consisting of a nanostructured gold grating coupled with a distributed Bragg reflector (DBR). This coupling makes it possible to obtain plasmonic Tamm states, where excitation is possible at normal incidence and does not require the use of the Kretschmann configuration. Through parameters optimization of the gold nanostructured grating, we achieve...Show More
Surface acoustic wave (SAW) sensors represent a prominent technologi-cal avenue for quantifying mechanical stress-induced deformations. Nonetheless, the integration of these microelectromechanical systems (MEMS) sensors remains a complex challenge. Consequently, a common approach within a multitude of research involves the utilization of an adhesive formulation. However, this mode of integration c...Show More
In this study, we conduct a comprehensive investigation to enhance the performance of shear surface acoustic wave (SAW) magnetic sensors. We explore the interaction between SAW and a nickel film deposited on ST-cut quartz in a delay line configuration. The nickel film, measuring 2\ \text{mm}in width and 100\ \text{nm} in thickness, undergoes vacuum annealing at 500\ ^\circ \text{C} to induce...Show More
Surface acoustic waves (SAWs) have a broad spectrum of applications, especially in sensing. However, deposition methods of sensitive layers can be controlled locally through electrodeposition unlike other conventional methods, such as drop-casting and atmospheric-pressure plasma. Employing this method, we experimentally demonstrate the local electrodeposition of PEDOT: PSS on a structured active g...Show More
This paper reports the realization of Through Silicon Vias (TSV) filled with electrodeposited copper (Cu) for the fabrication of aeronautics dedicated thermal MEMS (Micro Electro-Mechanical Systems) sensors. The micro-sensors are designed to measure the skin friction of the airflow on a structure. For testing in real conditions on an aircraft, a solid integration is required. Therefore, a producti...Show More
This paper presents and discusses the first demonstration of aerodynamic wall pressure measurement using a thermal Pirani effect based micro-sensor. The thermal micro-sensor is designed as a suspended micro-hot-wire separated from the substrate by a nanoscale gap, and mechanically supported by perpendicular micro-bridges. The micro-sensor was calibrated for pressure measurement from 10 kPa to 800 ...Show More
This paper presents and discusses micro-magneto-mechanical valves designed for cavity flow control. Realized using microfabrication techniques and rapid prototyping, the micro-valves exhibit a small footprint and adequate performances for low-speed cavity flow control. An array of 15 micro-valves was successfully integrated on a cavity model. Cavity flow control experiments demonstrated the impact...Show More
The achievement of an efficient acoustic biosensor based on one dimensional solid-liquid phononic crystals supporting bound states in the continuum (BICs) and Fano resonances is reported herein. The structure used in this work is made of solid-liquid-solid triple layer embedded in water. The main results in this paper consist to study the impact of: i) the effect of albumin concentration, ii) the ...Show More
Flow control techniques can be defined as methods changing a flow natural dynamics. The control of a flow can be achieved with actuators affecting the flow momentum. Therefore, a MMMS microvalve was designed and characterized. The micro-actuators have then been integrated to a wind tunnel on the upstream corner of a cavity. Open-loop flow control experiments have been performed.Show More
Robust micro machined high temperature gradient calorimetric (HTGC) transducers were designed and developed for flow separation control. Based on thermal principle, the transducers measure the amplitude and the sign of skin friction, making them particularly useful for flow separation detection. A set of 12 calorimetric micro-sensors along with miniaturized electronics was implemented on a flap mo...Show More
This work focuses on the theoretical and experimental investigation of acoustic waves sensors based on 2D Surface Phononic Crystals (PnC). We investigated the temperature coefficient of frequency (TCF) for surface localized modes in 2D PnCs composed of Ni pillars deposited on Y-cut LiNBO3 substrate. We demonstrated both theoretically and experimentally that near the first limit of the Brillouin zo...Show More
Sensors based on “resonance phenomenon” span a broad spectrum of important current applications including detection of biological and chemical agents, and measurements of physical quantities. Resonance phenomena occur with all types of waves: electromagnetic, optic, and acoustic. This review reports about the most recent advances in the design and applications of resonant “passive” sensors, i.e. r...Show More
This paper presents and discusses the results obtained with a MEMS (Micro-Electro-Mechanical System) high temperature gradient sensor for time-averaged and fluctuating skin-friction measurements in highly turbulent flows. Designed as a robust wall-mounted suspended hot-wire structure, the micro-sensor was made using conventional microfabrication techniques, compatible with microelectronics for des...Show More
The control of propagating waves can be achieved by introducing defect states in the phononic structure of the electroacoustic devices. This work investigates the interaction of Love waves in cavity-containing holey SiO2/Quartz structure with grafted Ni pillars. An optimal sized cavity in the holey PnC enables to obtain a cavity mode that matches the torsional resonance mode of the pillars. We sho...Show More
This paper presents and discusses the first demonstration of aerodynamic wall pressure measurement using a thermal Pirani effect based micro-sensor. The thermal micro-sensor is designed as a suspended micro-hot-wire separated from the substrate by a nanoscale gap, and mechanically supported by perpendicular micro-bridges. The micro-sensor was calibrated for pressure measurement from 10 kPa to 800 ...Show More
This paper shows the use of time domain reflec-tometry (TDR) applied to Surface Acoustic Waves (SAW) based magnetic field sensors to improve sensitivity of these devices. The basic operating principle of such sensors is the use of a magnetostrictive material along the SAW path to induce a velocity shift when biased with a magnetic field. This velocity shift is related to the interaction of the SAW...Show More
This paper presents and discusses the results obtained with a MEMS high temperature gradient sensor for time-averaged and fluctuating skin-friction measurements in highly turbulent flows. Designed as a robust wall-mounted suspended hot-wire structure, the micro-sensor showed a high temperature variation for low power consumption. Successfully implemented into two air wind tunnels, the sensor was t...Show More
Surface acoustic wave sensors find their application in a growing number of fields. This interest stems in particular from their passive nature and the possibility of remote interrogation. Still, the sensor package, due to its size, remains an obstacle for some applications. In this regard, packageless solutions are very promising. This paper describes the potential of the AlN/ZnO/LiNbO3 structure...Show More
Polydimethylsiloxane (PDMS) and other related silicon-based polymers are among the most widely employed elastomeric materials in microsystems, owing to their physical and chemical properties. Meanwhile, surface acoustic wave (SAW) and bulk acoustic wave (BAW) sensors and filters have been vastly explored for sensing and wireless applications. Many fields could benefit from the combined use of acou...Show More
This paper presents a multifunctional hot-wire based microstructure enabling the design of pressure sensors and wall shear stress sensors for aerodynamic applications. The hotwire is suspended over the substrate using periodic silicon oxide micro-bridges, allowing thermal insulation and mechanical toughness. The microstructure design was exploited to realize both wall shear stress sensors experime...Show More
Surface acoustic wave devices including magnetic materials have been shown to be useful to build up magnetic sensors. In the resonator geometry, we take advantage of the shape of the electrodes to engineer the response of the device. We studied theoretically and experimentally the response when the field is applied in the device plane, perpendicular to the electrode length. We show that the field ...Show More
This paper studies the Diamond/ZnO/LiNbO3 structure, numerically and experimentally, as a candidate for a packageless sensor based on the surface acoustic wave technology. The structure is compared with an AlN/ZnO/LiNbO3 structure, in order to highlight better performances of diamond with respect to AlN. Early experimental results of nanocrystalline diamond growth on ZnO/Si are presented.Show More
Several SAW devices based on Sc0.1Al0.9N/Sapphire bilayer structures were fabricated using various wavelengths and film thicknesses. The acoustic velocity, electromechanical coupling coefficient and temperature coefficient of frequency (TCF) of each device was then measured and the results were compared with calculations using several sets of elastic, piezoelectric and dielectric constants availab...Show More