Negative refraction and superresolution by a steel-methanol phononic crystal

2017 ◽  
Vol 141 (5) ◽  
pp. 3744-3744
Author(s):  
Ukesh Koju ◽  
Joel Mobley
Keyword(s):  
Negative Refraction ◽  
Phononic Crystal

Negative refraction of zero order flexural Lamb waves through a two-dimensional phononic crystal

2010 ◽  
Vol 97 (12) ◽  
pp. 121919 ◽  
Author(s):  
J. Pierre ◽  
O. Boyko ◽  
L. Belliard ◽  
J. O. Vasseur ◽  
B. Bonello
Keyword(s):  
Negative Refraction ◽  
Lamb Waves ◽  
Phononic Crystal ◽  
Zero Order ◽  
Two Dimensional

Frequency Tunable Phononic Crystal Flat Lens for Subwavelength Imaging

2021 ◽  
Author(s):  
Hrishikesh Danawe ◽  
Serife Tol
Keyword(s):  
Negative Refraction ◽  
Phononic Crystal ◽  
Ultrasonic Inspection ◽  
Aluminum Plate ◽  
Lens Design ◽  
Lattice Arrangement ◽  
Dispersion Branch ◽  
Small Spot ◽  
Flat Lens ◽  
Frequency Tunable

Abstract In this paper, we present a thickness-contrast based flat lens for subwavelenth imaging in an aluminum plate. The lens is made of phononic crystal (PC) with a triangular lattice arrangement of through holes drilled over an aluminum plate. Subwave-length imaging is achieved by exploiting the concept of negative refraction of A0 plate mode for the optical dispersion branch of the PC. The wavenumbers are matched at a design frequency by creating a step change in the thickness of the PC-lens and host plate. The thickness-contrast results in refractive index of minus one at the interface of the lens and host plate. Negative refraction-based lens overcomes the diffraction limit and enables focusing of flexural waves in an area less than a square wavelength. We validate the flat lens design at a single design frequency through numerical simulations and experiments. Further, we numerically demonstrate the tunability of the lens design over a broadband frequency range by modifying the thickness-contrast between the lens and host plate. The proposed frequency tunable design is promising for many applications such as ultrasonic inspection, tetherless energy transfer, and energy harvesting, where the localization of wave energy in a small spot is desirable.

Analysis of elastic waves transmitted through a 2-D phononic crystal exhibiting negative refraction

2011 ◽  
Vol 58 (1) ◽  
pp. 178-186 ◽  
Author(s):  
Charles Croënne ◽  
Bruno Morvan ◽  
Jérôme Vasseur ◽  
Bertrand Dubus ◽  
Anne-Christine Hladky-Hennion
Keyword(s):  
Elastic Waves ◽  
Negative Refraction ◽  
Phononic Crystal

scholarly journals Negative Refraction of Acoustic Waves in a Two-Dimensional Phononic Crystal via FDTD Simulation

2009 ◽  
Vol 50 (5) ◽  
pp. 1004-1007 ◽  
Author(s):  
Tomoyuki Kurose ◽  
Kenji Tsuruta ◽  
Chieko Totsuji ◽  
Hiroo Totsuji
Keyword(s):  
Acoustic Waves ◽  
Negative Refraction ◽  
Phononic Crystal ◽  
Fdtd Simulation ◽  
Two Dimensional

Negative refraction experiments with guided shear-horizontal waves in thin phononic crystal plates

2011 ◽  
Vol 98 (1) ◽  
pp. 011909 ◽  
Author(s):  
Min Kyung Lee ◽  
Pyung Sik Ma ◽  
Il Kyu Lee ◽  
Hoe Woong Kim ◽  
Yoon Young Kim
Keyword(s):  
Negative Refraction ◽  
Phononic Crystal ◽  
Shear Horizontal

Acoustic collimating beams by negative refraction in two-dimensional phononic crystal

2009 ◽  
Vol 105 (11) ◽  
pp. 116105 ◽  
Author(s):  
Zhaojian He ◽  
Yaofu Heng ◽  
Shasha Peng ◽  
Yiqun Ding ◽  
Manzhu Ke ◽  
...  
Keyword(s):  
Negative Refraction ◽  
Phononic Crystal ◽  
Two Dimensional

Tunable Multimode Filtering of Solid Acoustic Waves in a Three-Component Phononic Crystal Slab

2010 ◽  
Vol 150-151 ◽  
pp. 1625-1639
Author(s):  
Jing Li
Keyword(s):  
Longitudinal Wave ◽  
Acoustic Waves ◽  
Negative Refraction ◽  
Phononic Crystal ◽  
Wave Mode ◽  
Geometrical Parameters ◽  
Transverse Waves ◽  
Propagation Behavior ◽  
The Individual ◽  
Negative Refractions

Using of the multiple scattering methods, we characterize the positive and negative multi-refraction and transmission properties of a solid-based phononic crystal composed of coated solid inclusions in view of its applications in tunable multimode filtering. The geometrical parameters are chosen so that a left-handed longitudinal wave mode and a right-handed transverse wave mode, are simultaneously obtained in this three-component phononic crystal. When multimode Gaussian beams are placed transmitting through the phononic crystal slab, both positive and negative refractions are observed. We then study the individual propagation behavior of different modes. The angle dependent transmission beams with different energy distributions are found at the other side of the slab. Transmitted transverse waves coming from different directions incidence finally walk together into four oriented beams. Meanwhile, longitudinal wave incidence with different directions behaves simply as negative refraction in the slab. A far-field longitudinal wave image can be achieved being excited by a longitudinal wave point source. The three-component phononic crystal slab thus can be served as an alternate in tunable multimode filtering devices.

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