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Actively controlled asymmetric edge states for directional wireless power transfer
Optics Express
|March 17, 2021
Summary
This study demonstrates robust, long-range wireless power transfer (WPT) using topological edge states in a quasiperiodic chain. Active control of WPT direction was achieved by integrating electrically tunable components.
Area of Science:
- Topological photonics
- Condensed matter physics
- Electromagnetics
Background:
- Wireless power transfer (WPT) is crucial for modern devices but faces challenges in efficiency, range, and directional control.
- Topological photonics offers novel methods for robust wave control, potentially enhancing WPT systems.
- Existing WPT technologies struggle with maintaining efficiency and directionality over long distances.
Purpose of the Study:
- To design and fabricate a 1D quasiperiodic Harper chain for robust, directional WPT.
- To demonstrate actively controlled directional WPT using tunable topological edge states.
- To explore the potential of topological concepts for advanced WPT applications.
Main Methods:
- Fabrication of a 1D quasiperiodic Harper chain.
- Utilizing asymmetric topological edge states for directional WPT.
- Integration of variable capacitance diodes for active control of transmission direction.
- Experimental demonstration using LED lamps to visualize directional power transfer.
Main Results:
- Achieved robust and directional wireless power transfer over a long range.
- Demonstrated selective lighting of LED characters at chain ends, showcasing directional WPT.
- Successfully implemented actively controlled directional WPT by electrically tuning coil resonators.
- Observed changes in transmission direction with applied voltage, confirming dynamic control.
Conclusions:
- The developed topological quasiperiodic chain enables robust, long-range, and directionally controlled WPT.
- Actively tunable topological edge states provide a new pathway for dynamical control in WPT systems.
- This research opens avenues for advanced WPT applications in areas like electric vehicles and medical devices.
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