Results 31 to 40 of about 101,887 (285)

Acoustic bulk-surface-wave transducer

Electronics Letters, 1969
Bulk and surface waves are strongly coupled at a corrugated surface. Experiments have demonstrated transduction losses of less than 1dB and bandwidths of 20%. Methods of implementation at high frequencies are discussed.
R.F. Humphryes, E.A. Ash
openaire   +1 more source

Rock physics model for velocity—pressure relations and its application to shale pore pressure estimation

Petroleum Exploration and Development, 2023
Acoustic wave velocity has been commonly utilized to predict subsurface geopressure using empirical relations. Acoustic wave velocity is, however, affected by many factors. To estimate pore pressure accurately, we here propose to use elastic rock physics
Jingyi GUO, Min LI, Mingwei ZHUANG, Yuefeng SUN   +3 more
doaj   +1 more source

On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares [PDF]

, 2015
Observations of solar flares with sunquakes by space- and ground-based instruments reveal essentially different dynamics of seismic events in different flares.
Zharkov, Sergei, Zharkova, Valentina
core   +1 more source

Aluminum scandium nitride thin-film bulk acoustic resonators for 5G wideband applications

Microsystems & Nanoengineering, 2022
Bulk acoustic wave (BAW) filters have been extensively used in consumer products for mobile communication systems due to their high performance and standard complementary metal-oxide-semiconductor (CMOS) compatible integration process.
Yang Zou, Chao Gao, Jie Zhou, Yan Liu, Qinwen Xu, Yuanhang Qu, WenJuan Liu, Jeffrey Bo Woon Soon, Yao Cai, Chengliang Sun   +9 more
doaj   +1 more source

Resonant Ultrasonic Particle Manipulators and their Applications in Sensor Systems

, 2004
The paper describes the use of ultrasonic standing waves as bulk acoustic wave actuators, exploiting the acoustic radiation forces within the standing wave to move biological cells or other particles.
Harris, N.R., Hawkes, J.J., Hill, M., McDonnell, M.B.   +3 more
core   +1 more source

Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure

Scientific Reports, 2017
Pressure-induced polyamorphism in Ce-based metallic glass has attracted significant interest in condensed matter physics. In this paper, we discover that in association with the polyamorphism of La32Ce32Al16Ni5Cu15 bulk metallic glass, the acoustic ...
Xintong Qi, Yongtao Zou, Xuebing Wang, Ting Chen, David O. Welch, Jianzhong Jiang, Baosheng Li   +6 more
doaj   +1 more source

Dispersion Diagram of Trigonal Piezoelectric Phononic Structures with Langasite Inclusions

Crystals, 2021
The dispersion relation of elastic Bloch waves in 1-3 piezoelectric phononic structures (PPnSs) with Langasite (La3Ga5SiO14) inclusions in a polymeric matrix is reported.
Edson Miranda, Clodualdo Aranas, Samuel Rodrigues, Hélio Silva, Gedeon Reis, Antônio Paiva, José Dos Santos   +6 more
doaj   +1 more source

Carbon nanotube forests as top electrode in electroacoustic resonators [PDF]

, 2015
We grow carbon nanotube forests on piezoelectric AlN films and fabricate and characterize nanotube-based solidly mounted bulk acoustic wave resonators employing the forests as the top electrode material. The devices show values for quality factor at anti-
Bhardwaj, Sunil, Cepek, Cinzia, D?Arsi?, Lorenzo, DeMiguel-Ramos, Mario, Esconjauregui, Santiago, Guo, Yuzheng, Iborra, Enrique, Makaryan, Taron, Mirea, Teona, Olivares, Jimena, Robertson, John, Sugime, Hisashi, Yang, Junwei   +12 more
core   +3 more sources

Design of a broadband acousto-optic filter using bulk acoustic wave beam steering with an interdigital transducer

Results in Physics
Acousto-optic tunable filters are photonics devices whose operation is fundamentally based on crystal acoustics. One of the phenomena used to improve performances of bulk acousto-optic devices is acoustic beam steering.
Konstantin B. Yushkov, Natalya F. Naumenko, Vladimir Ya. Molchanov   +2 more
doaj   +1 more source

The multi-physics metawedge: graded arrays on fluid-loaded elastic plates and the mechanical analogues of rainbow trapping and mode conversion

New Journal of Physics, 2018
We consider the propagation and mode conversion of flexural-acoustic waves along a fluid-loaded graded array of elastic resonators, forming a metasurface.
E A Skelton, R V Craster, A Colombi, D J Colquitt   +3 more
doaj   +1 more source