Article
Physics, Multidisciplinary
Michael T. M. Woodley, Lewis Hill, Leonardo Del Bino, Gian-Luca Oppo, Pascal Del'Haye
Summary: In Kerr ring microresonators, oscillatory antiphase switching between counterpropagating light beams has been experimentally and numerically observed, where the intensity dominance between the two beams periodically exchanges chaotically. Self-switching occurs in balanced regimes and is captured by a simple coupled dynamical system with Kerr nonlinearities. The switching phenomena are due to temporal instabilities of symmetry-broken states combined with attractor merging, which restores broken symmetry on average. The self-switching of counterpropagating light is robust for applications such as controllable, all-optical waveform generation, signal encoding, and chaotic cryptography.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Analytical
Marian Gilewski
Summary: This article discusses the application considerations in the optical sensor of a micro-electro-mechanical system (MEMS). The analysis provided is limited to application issues encountered in research or industrial applications. The article focuses on a case where the sensor is used as a feedback signal source to stabilize the flux of an LED lamp. The main challenge in using such sensors is the conditioning of the output analog signal for further digital processing.
Article
Engineering, Electrical & Electronic
Mark Pallay, Meysam Daeichin, Shahrzad Towfighian
Summary: A tunable threshold pressure sensor based on parametric resonance of a microbeam subjected to electrostatic levitation is proposed. The appearance of parametric resonance depends on the pressure, which influences the amount of energy loss from squeeze film damping. The sensor's activation and reliability, along with improved resolution, make it advantageous over pull-in based sensors.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2021)
Article
Multidisciplinary Sciences
Heiko Gimperlein, Runan He, Andrew A. A. Lacey
Summary: In this paper, we investigate the creation of finite-time quenching singularities in semi-linear wave equations with negative power nonlinearities, which can be used to model micro-electro-mechanical systems. For radial initial data, we find the existence of a sequence of quenching self-similar solutions and propose a conjecture for the singular behavior based on formal asymptotic analysis and numerical experiments.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Mathematics, Applied
Yong Wang, Sha Liu, Congshan Zhuo, Chengwen Zhong
Summary: This paper investigates the nonlinear squeeze-film damping involving rarefied gas effect in MEMS, introducing the kinetic method DUGKS and two solving methods to study the dynamics of structures under forced and free oscillations. Numerical results and discussions on the nonlinear SFD phenomenon and the influence of oscillation frequency on damping force or torque are presented.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Srinivasa Rao Vutla, Srinivasa Prakash Regalla, Kannan Ramaswamy
Summary: This study evaluates the design sustainability and energy sustainability of a cleanroom by experimenting on the scavenging time of contaminant particles and using metrics such as net total pressure efficiency and total energy performance index. The novel adaptation of existing life cycle assessment methods and energy sustainability metrics to assess the efficacy of a MEMS cleanroom design demonstrates environmental sustainability and holds potential for developing economies.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Mechanics
Yaghoub Tadi Beni
Summary: The free vibration and static torsion of a coupling electromechanical flexoelectric micro/nanotube have been investigated using non-classical theory of continuum mechanics. The coupling governing equations and their formulation with classical and non-classical boundary conditions have been developed. The effects of mechanical and electrical size effect parameters on direct and reverse flexoelectric torsion have been studied, and the introduction of polarization as a new variable in the equations has been investigated. The results highlight the importance of polarization in simulating torsional electromechanical structures.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Acoustics
Ulrich Gael Ngouabo, Peguy Roussel Nwagoum Tuwa, Samuel Noubissie, Paul Woafo
Summary: This study focuses on the nonlinear analysis of electrostatic micro-electro-mechanical systems resonators with two symmetric electrodes under delayed proportional-derivative controller. By analyzing the stability and bifurcation diagrams, the impacts of proportional-derivative gains and time delay on system dynamics were investigated, along with the conditions for horseshoe chaos emergence. It was observed that an increase in proportional gain contributes to expanding the region of regular motion.
JOURNAL OF VIBRATION AND CONTROL
(2021)
Review
Chemistry, Analytical
Giorgio De Pasquale
Summary: Additive manufacturing (AM) processes at the micrometer range are undergoing intense development recently, with efforts to integrate them with traditional MEMS fabrication processes and to develop specific design methods for this field. Despite the abundance of documentation on process attempts, setup details, and case studies, organized analysis of the specific and comparative advantages, constraints, and limitations of AM methods for microstructures is necessary due to the diverse variety of processes and materials.
Article
Mathematics, Applied
Qigang Yuan, Zhibo Cheng, Xueping Li
Summary: This study investigates a canonical mass-spring model of electrostatically actuated Micro-Electro-Mechanical System (MEMS). The existence and bifurcations of periodic solutions are explored using the continuation theorem of Manasevich and Mawhin with techniques of a priori estimate and bifurcation theory. The main results provide answers to an open problem proposed by P. Torres and reveal saddle node and period doubling bifurcations in the system, resulting in the multiplicity of periodic solutions. Additionally, the study discovers bistability of periodic solutions, generated by the combination of these bifurcations, shedding light on the pull-in instability in the system. Finally, periodic orbits with different stability and corresponding time series are presented to illustrate the findings.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Engineering, Electrical & Electronic
Sumedha Nitin Prabhu, Subhas Chandra Mukhopadhyay, Rosario Morello
Summary: The study focused on the impact of coating thickness on sensitivity in MEMS sensors, finding that increasing the functionalization layer thickness substantially raises the saturation level.
IEEE SENSORS JOURNAL
(2021)
Review
Nanoscience & Nanotechnology
Nan Xu, Ze-Di Cheng, Jin-Dao Tang, Xiao-Min Lv, Tong Li, Meng-Lin Guo, You Wang, Hai-Zhi Song, Qiang Zhou, Guang-Wei Deng
Summary: NOEMS, as a new platform for studying electronic and mechanical freedoms in nanophotonics, offers exciting opportunities to manipulate information carriers using optical, electrical, and mechanical degrees of freedom. The technology has the potential to implement high-speed, low-power consumption switches and various quantum information processing functions through on-chip integration.
Article
Computer Science, Artificial Intelligence
Ardashir Mohammadzadeh, Reza Hadjiaghaie Vafaie
Summary: This study proposes a new fuzzy logic controller for MEMS gyroscopes, utilizing deep learning and optimization to address nonlinearities and unknown dynamics, demonstrating superior performance through multiple simulations and comparisons.
APPLIED SOFT COMPUTING
(2021)
Article
Optics
Yannick Minet, Simon J. Herr, Ingo Breunig, Hans Zappe, Karsten Buse
Summary: Tunable light sources are crucial for various applications, and this study presents a neodymium-doped single-frequency laser based on a lithium niobate whispering gallery mode resonator, achieving stable tuning range via the linear electro-optic effect. This concept is suitable for full integration with existing photonic platforms.
Article
Optics
Ruixuan Wang, Jingwei Li, Lutong Cai, Qing Li
Summary: In this study, the Pockels effect was explored in high-Q 4H-SiC microresonators, and gigahertz-level electrooptic modulation was demonstrated for the first time. The Pockels coefficients were found to vary among 4H-SiC wafers from different manufacturers.
Article
Engineering, Electrical & Electronic
Shoeib Rahmatollahi, Mohammad Taherzadeh-Sani, Frederic Nabki
Summary: This paper describes an IR-UWB TWR system for indoor and harsh environments. In this system, a sync word with UWB impulses and PPM modulation is transmitted from the anchor and detected by the tag using a continuous-time sync detection mechanism. The tag then reflects a similar sync-word back to the anchor, and the ToF between the transmitted and received sync is calculated to measure the distance. The proposed system reduces sync detection and reply time by using a clock-less active reflector, and mitigates interference by combining OOK and PPM.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Arash Abbasi, Frederic Nabki
Summary: A wideband cascaded receiver and a stacked receiver using an improved clock strategy are proposed to support the software-defined radio (SDR). The cascaded receiver achieves a conversion gain from 26 dB to 36 dB, double-sideband noise-figure from 1.4 dB to 3.9 dB, S-11<-10 dB, and an IIP3 from -7.5 dBm to -10.5 dBm over the RF operating band from 0.4 GHz to 12 GHz. The stacked receiver achieves a conversion gain from 34.5 dB to 36 dB, NFDSB from 4.6 dB to 6.2 dB, S-11<-10 dB, and an IIP3 from -21 dBm to -17.5 dBm over the RF operating band from 2.2 GHz to 3.2 GHz.
JOURNAL OF LOW POWER ELECTRONICS AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Kai Tang, Chuanshi Yang, Yanshu Guo, Nan Wang, Yao Zhu, Ying Zhang, Eldwin Jiaqiang Ng, Joshua En-Yuan Lee, Zhongyuan Fang, Wensong Wang, Hanjun Jiang, Chun-Huat Heng, Yuanjin Zheng
Summary: This article introduces an ultralow-power microelectromechanical system (MEMS)-based transceiver and wake-up receiver. The system supports a shared antenna interface and uses adaptive fast switching technique and high-Q MEMS resonator to reduce power consumption and achieve frequency stability. The MEMS-based modulator provides LO in FSK RX for better interference filtering, and the FSK-matched filter with matching network and current-reuse LNA ensure high blocker/interference rejection with low power. The fabricated TX generates FSK signals with high output power and a data rate of up to 6 Mb/s, while the RX exhibits high sensitivity and in-band signal-to-interference ratio at 2 Mb/s data rate. Overall, the proposed system achieves significant energy efficiency improvement and is suitable for energy-efficient pico-IoT applications.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2023)
Article
Engineering, Electrical & Electronic
Renhua Yang, Siping Huang, Yiwen Zhang, Chao Zhang, Jingui Qian, Raymond H. W. Lam, Joshua E-Y Lee, Zuankai Wang
Summary: In this work, a high-throughput multi-sample acoustofluidic aggregation device is proposed, which can manipulate up to 12 samples simultaneously using a single reusable acoustic tweezer. The device utilizes a polydimethylsiloxane frame as a selective acoustic-absorbing feature to create asymmetric acoustic waves over multiple detachable superstrates. The device can efficiently aggregate multiple samples of various compositions and sizes, ranging from non-bioactive microparticles to bioactive cells.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2023)
Article
Chemistry, Analytical
Almur A. S. Rabih, Mohammad Kazemi, Michael Menard, Frederic Nabki
Summary: This study presents a novel aluminum nitride-based out-of-plane piezoelectric MEMS actuator equipped with a capacitive sensing mechanism to track its displacement. The actuator can be integrated within PICs to align different chips.
Article
Chemistry, Analytical
Zayed Ahmed, Charles Duruaku, Fatemeh Edalatfar, Mehrdad Moallem, Behraad Bahreyni
Summary: We propose a high-performance capacitive accelerometer for particle acceleration detection applications, with a sub-μg noise limit and 1.2 kHz bandwidth. The accelerometer achieves low noise through optimized device design and operation under vacuum to reduce air damping effects. It is designed with two sets of electrodes for high and low electrostatic coupling efficiency, allowing it to operate in high-sensitivity or high-resiliency modes. The device utilizes a closed-loop electrostatic feedback control architecture to counteract large displacements near resonance frequency.
Article
Engineering, Electrical & Electronic
Amin Pourvali Kakhki, Mohammad Taherzadeh-Sani, Frederic Nabki
Summary: This paper presents a non-coherent assisted synchronization mechanism for low data rate coherent impulse radio ultra-wide band (IR-UWB) receivers. The proposed hybrid scheme simplifies the coherent synchronization and reduces power consumption by utilizing a two-step acquisition mechanism. The receiver achieves enhanced energy efficiency while maintaining sensitivity benefits of coherent detection.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Chemistry, Analytical
Mohammad Kazemi, Seyedfakhreddin Nabavi, Mathieu Gratuze, Frederic Nabki
Summary: This study investigates the effect of elastic wave reflectors on the quality factor of microelectromechanical resonators. The research found that half-circle-shaped holes facing the anchors yield the most promising results, increasing the quality factor by a factor of 1.70x in air or 1.72x in vacuum.
Review
Nanoscience & Nanotechnology
Kaustav Roy, Joshua En-Yuan Lee, Chengkuo Lee
Summary: This review discusses the research progress of thin-film PMUTs in the field of microultrasound, highlighting that the research in this field began 44 years ago with the development of functional piezoelectric thin-film materials. Three major companies are currently commercializing thin-film PMUTs on a bulk scale. The review comprehensively covers the extensive development of these devices' design, manufacturing, and function, including the global PMUT outlook, design principles, manufacturing methods, nonconventional PMUT designs, and category-wise applications.
MICROSYSTEMS & NANOENGINEERING
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ali Poursaadati Zinjanab, Nakisa Shams, Frederic Nabki
Summary: This article presents a low power ultra-wideband (UWB) RF receiver using two N-path notch filters. The receiver architecture consists of two N-path notch filter systems as a Miller feedback network around a low noise amplifier (LNA). The receiver achieves a noise figure (NF) of less than 5.5 dB, a conversion gain of 61 dB, and consumes less than 12 mW from a 1-V supply, including the local oscillator (LO) current.
2023 21ST IEEE INTERREGIONAL NEWCAS CONFERENCE, NEWCAS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Hamid Sadrimanesh, Yves Blaquiere, Frederic Nabki
Summary: This paper presents a piezoelectric MEMS-based digital isolator that transfers ultrasound waves through the medium of air. A front-to-back 2.5-dimensional structure is also introduced for assembling MEMS dice in the piezoMUMPs process. The front-to-back stacking of dice is possible in this process, reducing the distance between the transmitter and receiver by 43% compared to the conventional method. Additionally, simulations show that the conical shape of the through silicon opening (TSO) has a direct effect on the transmission bit rate, improving it by 3.5 times compared to the straight shape.
2023 21ST IEEE INTERREGIONAL NEWCAS CONFERENCE, NEWCAS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Abdurrashid Hassan Shuaibu, Yves Blaquiere, Frederic Nabki
Summary: In this study, a cantilever-based electrostatically actuated micro-electro-mechanical systems (MEMS) actuator aimed for a DC switch was investigated in the PolyMUMPs process. A modified design was proposed to overcome the challenge of conformal coverage and improve the contact force, by staking Poly 1 pads onto the substrate while the suspended beam remains in Poly 2. The experimental results showed promising potential for MEMS polysilicon DC switches based on this work.
2023 21ST IEEE INTERREGIONAL NEWCAS CONFERENCE, NEWCAS
(2023)
Article
Engineering, Electrical & Electronic
Maryam Ghamati, Mohammad Taherzadeh, Frederic Nabki, Milica Popovic
Summary: This article proposes a technique to reduce the complexity and cost in ultra-wideband imaging by digitizing only the peak values and incident-time stamps of the received signal. Experimental results demonstrate that this technique enables fast imaging and achieves low localization error, showing great potential for practical applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Kazemi, Seyedfakhreddin Nabavi, Mathieu Gratuze, Frederic Nabki
Summary: This paper presents an innovative method for tuning the resonant frequency of beam resonators using electrostatic actuators, which increases the stiffness of the anchoring structure and significantly enhances the resonant frequency.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Suraj Sharma, Seyedfakhreddin Nabavi, Almur Abdelkreem Saeed Rabih, Michael Menard, Frederic Nabki
Summary: This work demonstrates a hybrid MEMS actuator platform that combines electrostatic and piezoelectric actuators to displace a suspended MEMS platform along 3 degrees-of freedom. The actuator shows good displacement performance and compensation capability, making it suitable for efficient optical switching applications.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2023)
