Article
Engineering, Mechanical
Hao Qiu, Mingtong Chen, Faxin Li
Summary: The study introduces a piezoelectric interdigital transducer named SH-IDT for selectively exciting SH waves, deriving an explicit formula for far-field wave displacement and validating it through finite element simulations. Two SH1-IDTs at different frequencies were designed and fabricated for wave mode selection and energy concentration, with experimental results in good agreement with simulation results, validating the design of the SH1-IDT.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Instruments & Instrumentation
Zhiguo Pei, Yuting Ma, Ce Wang, Yunliang Wu, Feifei Song, Xiaodong Wu
Summary: The compact driver based on current feedback amplifiers is capable of driving a wider range of loads without impedance matching and operates with low power consumption. A Butterworth-Van Dyke equivalent circuit was fabricated to study the electrical characteristics of the IDTs. Experimental testing demonstrates that the driver meets sorting requirements and allows the cell sorter to extract rare cells while consuming low power.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Engineering, Electrical & Electronic
Basudeba Behera
Summary: The research introduces a newly developed mechanism using liquid as a surface acoustic wave actuator to achieve linear motion with a lightweight design. By utilizing Rayleigh waves on piezoelectric stators transmitting into a liquid medium, the actuator drives a slider in translational motion.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Characterization & Testing
L. Xiang, S. Dixon, C. B. Thring, Z. Li, R. S. Edwards
Summary: This paper investigates the waveform distortion of electromagnetic acoustic transducers (EMATs) as the lift-off distance increases. It demonstrates the impact of induced current spatial distribution on ultrasound pulses. The study also explores the influence of coil spacing on lift-off behavior in EMATs with an array configuration.
NDT & E INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Feng Gao, Aisha M. Al-Qahtani, Abdelkrim Khelif, Farid Boussaid, Sarah Benchabane, Yu Cheng, Omar El Agnaf, Amine Bermak
Summary: A novel Lamb wave resonator with fully suppressed acoustic radiation in water is proposed for high-resolution mass-sensitive detection of biomolecules. The elimination of acoustic radiation is achieved by slowing down the Lamb wave to a velocity lower than the sound speed in water, enabling high-quality factor resonance and reducing sensing frequency noise. High aspect ratio electrodes are used to slow down the Lamb wave, enhancing mass sensitivity and overall sensing resolution.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Andrey Smirnov, Boris Zaitsev, Andrey Teplykh, Ilya Nedospasov, Egor Golovanov, Zheng-hua Qian, Bin Wang, Iren Kuznetsova
Summary: Through the use of a 3D finite element method, the excitation and registration of evanescent acoustic waves in piezoelectric plates was successfully demonstrated, with experimental results confirming the theoretical predictions.
Review
Physics, Applied
Mercedes Stringer, Ziming Zeng, Xiaoyan Zhang, Yanyan Chai, Wen Li, Jikai Zhang, Huiling Ong, Dongfang Liang, Jing Dong, Yiming Li, Yongqing Fu, Xin Yang
Summary: Acoustofluidics, based on acoustic streaming generated by leaky surface acoustic waves (SAWs) through interdigital transducer (IDT) technology, provides contact-free manipulation of particles and fluids for various life sciences applications. This review paper aims to provide a comprehensive overview of the underlying physics, IDT designs, methodologies, and biomedical applications of acoustic streaming-based acoustofluidics. Challenges, future developments, and directions for this field are also discussed.
APPLIED PHYSICS REVIEWS
(2023)
Article
Acoustics
Tai -Ho Yu
Summary: This study investigated the characteristics and propagation of thickness mode and thickness shear mode Lamb waves excited by a surface interdigital transducer and incident on piezoelectric ceramic plates. Numerical calculations were performed to analyze the time-domain response, frequency-domain response, and wave propagation of these Lamb waves. The study also examined the effects of different electrode numbers and widths on the near-field and far-field responses of interdigital transducers.
Article
Physics, Applied
Mithun Bhowmick, Haowen Xi, Bruno Ullrich
Summary: This article introduces a model that accurately fits the absorption saturation parameter linked to the effective electron density of states, allowing for the comparison of experimentally found absorption limits and their variations in compound semiconductors with theoretical expectations. This is crucial for certain optoelectronic device applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Yan-cheng Wang, Cheng-yao Xu, De-qing Mei, Jia-wei Liu
Summary: This paper presents a novel method to pattern microscale particles into biocompatible PEGDA fluid through a designed SAW device with SFITs, with numerical modeling and experiments verifying its feasibility. By adjusting signal frequencies, various patterned pressure fields can be generated, showing great potential for a wide range of applications.
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2021)
Article
Materials Science, Multidisciplinary
Sheikh Z. Ahmed, Yaohua Tan, Jiyuan Zheng, Joe C. Campbell, Avik W. Ghosh
Summary: This paper investigates the origin of small band gaps in III-V digital alloy avalanche photodiodes and provides a method for controlling the size of the valence band mini-gap to achieve high-gain avalanche photodiodes.
Article
Automation & Control Systems
Huijuan Dong, Mingyang Sui, Guanyu Mu, Jie Zhao, Tianlong Li, Tong Sun, Kenneth T. V. Grattan
Summary: This article discusses the use of surface acoustic wave (SAW) technology in lab-on-a-chip applications for droplet actuation. By adjusting the excitation phase shift, theta, of interdigital transducers (IDTs), the velocity and direction of microdroplets can be controlled. The authors present the equation for the vibration of mixed traveling surface acoustic waves (TSAWs) and standing surface acoustic waves (SSAWs) formed on the substrate surface operating in the exciter-exciter mode. They derive an analytical expression for the acoustic standing wave ratio as a function of theta and the spatial phase difference. Experimental results demonstrate the potential of the exciter-exciter mode in increasing the velocity of actuated droplets compared to the traditional exciter-absorber mode.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Dongdong Chu, Congwei Xie, Zhihua Yang
Summary: Infrared nonlinear optical crystals are crucial for expanding the output range of solid-state lasers, but their application is limited due to the challenge of balancing large band gaps and strong NLO response. This study proposes a computational workflow to explore diamond-like structures, and successfully predicts a series of LiMgGaSe3 structures with good optical performance.
INORGANIC CHEMISTRY
(2022)
Article
Physics, Applied
Bulent Ulug, Furkan Kuruoglu, Yesim Yalcin, Ayse Erol, Fahrettin Sarcan, Ali Sahin, Ahmet Cicek
Summary: This study demonstrates the formation of surface acoustic wave quasi-Bessel beams on a piezoelectric substrate through the superposition of plane waves generated by tilted interdigital transducers. The non-diffracting Bessel beams can be utilized in acoustophoresis and sensing applications in microfluidic systems.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
Marc Duquennoy, Nikolay Smagin, Tahar Kadi, Mohammadi Ouaftouh, Frederic Jenot
Summary: This paper presents an emitter transducer composed of interdigitated chirp electrodes deposited on 128 degrees Y-cut LiNbO3, which efficiently generates surface acoustic waves (SAW) in a frequency range of 100 to 240 MHz with a displacement level up to 1 nm. Electrical characterization and displacement field analysis of SAW using laser Doppler vibrometry are provided, demonstrating the significant unidirectionality of the transducer. Furthermore, the paper showcases the importance of SAW velocity dispersion in accurately estimating the submicrometer thickness of titanium thin films deposited on silicon.
