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Directional Ultrasound Source for Solid Materials Inspection: Diffraction Management in a Metallic Phononic Crystal
Hossam Selim1, Rubén Picó2, Jose Trull1
1Physics Department, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, 08222 Terrassa, Spain.
Sensors (Basel, Switzerland)
|November 3, 2020
Summary
This study shows a metallic phononic crystal acts as an ultrasonic lens, focusing elastic waves. This technology offers precise ultrasonic wave control for industrial and medical applications.
Area of Science:
- Materials Science
- Acoustics
- Condensed Matter Physics
Background:
- Phononic crystals offer unique wave manipulation properties.
- Controlling elastic wave propagation is crucial for various applications.
Purpose of the Study:
- To numerically investigate diffraction management of elastic waves in 2D metallic phononic crystals.
- To demonstrate the phononic crystal's capability as an ultrasonic lens for wave focusing.
Main Methods:
- Numerical simulations were employed to study wave propagation.
- The phononic crystal's self-collimation and focusing effects were analyzed.
Main Results:
- The 2D metallic phononic crystal acts as an ultrasonic lens, achieving self-collimation and focusing.
- These focusing effects are robust across a wide frequency band.
- Wave propagation through a coupling gel maintained the focusing properties.
Conclusions:
- The developed ultrasonic lens technology enables controlled directivity and focusing of ultrasonic waves.
- Potential applications include industrial and medical imaging, and non-destructive testing.
- The study validates the concept for precise ultrasonic wave localization.
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