Results 81 to 90 of about 284,460 (322)

High-frequency cavity optomechanics using bulk acoustic phonons [PDF]

Science Advances, 2018
Researchers demonstrate optical control of macroscopic, high-frequency acoustic waves for classical and quantum applications. To date, microscale and nanoscale optomechanical systems have enabled many proof-of-principle quantum operations through access ...
P. Kharel, G. Harris, E. Kittlaus, W. Renninger, N. Otterstrom, J. Harris, P. Rakich   +6 more
semanticscholar   +1 more source

Artificial Intelligence‐Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling

Advanced Materials, EarlyView.
AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll, Ivan Pinto‐Huguet, Enzo Rotunno, Thomas Galvani, Catalina Coll, Payam Habibzadeh Kavkani, Maria Chiara Spadaro, Yann‐Michel Niquet, Martin Børstad Eriksen, Sara Martí‐Sánchez, Georgios Katsaros, Giordano Scappucci, Peter Krogstrup, Giovanni Isella, Andreu Cabot, Gonzalo Merino, Pablo Ordejón, Stephan Roche, Vincenzo Grillo, Jordi Arbiol   +19 more
wiley   +1 more source

Enhancement of high-frequency harmonics in resonators using multilayered structures with polarity-inverted layers

Results in Physics
Periodically Poled Piezoelectric Film (P3F) stacks have recently been reported as a promising platform for next-generation radio-frequency acoustic filters that extend into cm- and mm-wave bands.
Natalya F. Naumenko
doaj   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

Acousto-optic superlattice modulator using Fibre Bragg grating

, 1997
A modulator is reported in which an extensional acoustic wave is launched along a fiber Bragg grating. The acousto-optic superlattice effect causes an enhancement in reflectivity within a narrow spectral region on both sides of the Bragg wavelength.
Dong, L., Liu, W.F., Russell, P.St.J.
core   +1 more source

Micromachined Bulk Wave Acoustic Bandgap Devices

TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference, 2007
A MEMS bulk wave acoustic bandgap has been designed and experimentally verified. The acoustic bandgaps are realized by including tungsten (W) scatterers in a SiO2 matrix. Wide frequency ranges where acoustic waves are forbidden to exist are formed due to the large density and acoustic impedance mismatch between W and SiO2.
Roy H. Olsson, James G. Fleming, Ihab F. El-Kady, Melanie R. Tuck, Frederick B. McCormick   +4 more
openaire   +2 more sources

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Acoustic wave sensors

Archives of Acoustics, 2014
Acoustic waves excited in a piezoelectric medium provide an attractive technology for realizing a variety of sensor that exhibit high sensitivity, small size and portability, fast responses, ruggedness and robustness, high accuracy, compatibility with ...
R.M. LEC
doaj  

A Label Free Disposable Device for Rapid Isolation of Rare Tumor Cells from Blood by Ultrasounds

Micromachines, 2018
The use of blood samples as liquid biopsy is a label-free method for cancer diagnosis that offers benefits over traditional invasive biopsy techniques. Cell sorting by acoustic waves offers a means to separate rare cells from blood samples based on their
Itziar González, Julie Earl, Luis J. Fernández, Bruno Sainz, Alberto Pinto, Rosa Monge, Sonia Alcalá, Adela Castillejo, Jose L. Soto, Alfredo Carrato   +9 more
doaj   +1 more source

Equality of the energy and group velocities of bulk acoustic waves in piezoelectric media

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005
The equality of the energy and group velocities of bulk acoustic waves in a lossless piezoelectric medium is demonstrated, with the energy velocity defined from the generalized energy density and the generalized Poynting vector.
V. Laude, A. Reinhardt, A. Khelif
semanticscholar   +1 more source