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From modal mixing to tunable functional switches in nonlinear phononic crystals
1Department of Civil, Environmental, and Geo- Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Physical Review Letters
|February 21, 2015
Summary
We present a new method for controlling waves using nonlinear phononic crystals, enabling tunable and multifunctional wave manipulation. This approach allows for advanced wave control systems by activating high-frequency characteristics in low-frequency regimes.
Area of Science:
- Physics
- Materials Science
- Engineering
Background:
- Nonlinear phononic crystals offer unique wave manipulation capabilities.
- Current methods for wave control often lack tunability and multifunctionality.
Purpose of the Study:
- To introduce a novel paradigm for spatial and modal wave manipulation using nonlinear phononic crystals.
- To explore the potential for engineering tunable, adaptive, and multifunctional wave control systems.
Main Methods:
- Exploiting nonlinear mechanisms to alter wave frequency signatures and distribute them across multiple modes.
- Investigating various granular crystal configurations to demonstrate versatility in crystal topologies and wave control functionalities.
Main Results:
- Demonstrated the ability to activate high-frequency optical mode characteristics within a low-frequency regime.
- Showcased the switching between complementary functionalities, enabling programmable acoustic ports.
- Established a new structural logic framework for wave control enabled by nonlinearity.
Conclusions:
- Nonlinear phononic crystals provide a versatile platform for advanced wave control.
- This approach enables the development of adaptive, multifunctional wave manipulation systems.
- The concept of programmable acoustic ports opens new avenues in structural logic design.
