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Wave Manipulations by Coherent Perfect Channeling.
Xiaonan Zhang1, Chong Meng1, Z Yang2
1Department of Physics, the Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China.
Scientific Reports
|October 26, 2017
Summary
Coherent perfect channeling (CPC) enables control over wave propagation in multi-channel systems. This research demonstrates how to direct incoming waves into specific outgoing channels using tailored scatterers.
Area of Science:
- Wave physics
- Quantum mechanics
- Photonics
Background:
- Wave energy conservation is fundamental in multi-channel systems.
- Controlling wave propagation at junctions is crucial for various applications.
- Coherent interactions allow for precise manipulation of wave behavior.
Purpose of the Study:
- To investigate the phenomenon of coherent perfect channeling (CPC).
- To demonstrate experimental and theoretical control over wave redirection in multi-channel waveguides.
- To explore the role of subwavelength scatterers in achieving CPC.
Main Methods:
- Utilizing wave energy conserved and reversible processes.
- Employing coherent interactions in multi-channel waveguide systems.
- Investigating scatterers and their scattering matrices at common junctions.
Main Results:
- Demonstrated CPC in three and four-channel waveguides by controlling incoming waves.
- Identified two novel scatterers, one experimentally confirmed and one theoretically predicted.
- Constructed scattering matrices for discovered scatterers and explored others.
Conclusions:
- CPC offers a method to exclusively direct outgoing waves into specific channels.
- The scattering matrix formalism provides a pathway to extend CPC to other wave types, including electromagnetic and quantum waves.
- This work opens possibilities for advanced wave manipulation and control.
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