Effect of an Electric Field on the Propagation Velocity of Surface Acoustic Waves in Piezoelectric media

1983 ◽  
Author(s):  
A. Palma ◽  
F. Palma ◽  
L. Palmieri ◽  
G. Socino ◽  
E. Verona
Keyword(s):  
Electric Field ◽  
Acoustic Waves ◽  
Propagation Velocity ◽  
Surface Acoustic Waves ◽  
Piezoelectric Media

The role of electric field in microfluidic heating induced by standing surface acoustic waves

2018 ◽  
Vol 112 (23) ◽  
pp. 233702 ◽  
Author(s):  
Tengfei Zheng ◽  
Chaohui Wang ◽  
Qiao Hu ◽  
Shoupeng Wei
Keyword(s):  
Electric Field ◽  
Acoustic Waves ◽  
Surface Acoustic Waves

Analysis of Surface Acoustic Waves in Layered Piezoelectric Media and its Applications to the Design of Saw Devices

2003 ◽  
Vol 19 (1) ◽  
pp. 225-232 ◽  
Author(s):  
T.-T. Wu ◽  
Y.-Y. Chen
Keyword(s):  
Acoustic Waves ◽  
Velocity Dispersion ◽  
Metal Layer ◽  
Effective Permittivity ◽  
Surface Acoustic Waves ◽  
Frequency Bandwidth ◽  
Piezoelectric Media ◽  
Saw Devices ◽  
Phase Velocity Dispersion

ABSTRACTIn this paper, we utilized a Stroh based formulation for solving problems of surface waves in layered piezoelectric media, and then, applied it to analyze surface acoustic wave (SAW) devices. The determination of the optimal cut of a piezoelectric crystal and the choice of the best propagation of SAW devices were given. The dispersion induced by a thin metal layer on SAW propagation in a SAW device was analyzed and discussed. Finally, we applied the formulation to calculate the effective permittivity and phase velocity dispersion of a LiNbO3/Diamond layered SAW device. Both of the null frequency bandwidth and the insertion loss of the dispersive SAW device were obtained.

scholarly journals Influence of X7GeS5I (X = Ag, Cu) Superionic Nanoparticles on Structural Changes in Nematic Liquid Crystal

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 413
Author(s):  
Peter Bury ◽  
Marek Veveričík ◽  
Peter Kopčanský ◽  
Milan Timko ◽  
Ihor P. Studenyak ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Acoustic Waves ◽  
Structural Changes ◽  
Light Transmission ◽  
Surface Acoustic Waves ◽  
Switching Behavior ◽  
Suspension Stability ◽  
Linearly Polarized

The effect of two types of superionic nanoparticles; Cu7GeS5I and Ag7GeS5I, respectively on nematic liquid crystal (6CB) behavior under an external electric field is investigated. The response of both attenuation of surface acoustic waves propagating along with the substrate/liquid crystal interface and light transmission are used to study the structural changes induced by applied electric field. The increasing/decreasing regime as well as jumped change of applied field were used. The light transmission was investigated using linearly polarized laser beam (532 nm) propagating through the liquid crystal. Results obtained from both measurements for three different concentrations (0.01, 0.05 and 0.10 wt%) and in addition two different sizes of nanoparticles are compared and results, relying on structural changes, suspension stability and switching behavior are evaluated.

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