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Tunable three-way topological energy-splitter.
Mehul P Makwana1,2, Gregory Chaplain3
1Department of Mathematics, Imperial College London, London, SW7 2AZ, UK. mehul.makwana07@imperial.ac.uk.
Scientific Reports
|December 14, 2019
Summary
Researchers developed a novel three-way topological energy splitter using square lattices, breaking symmetries to create unique interfaces for wave manipulation. This breakthrough enables efficient beam-splitting and steering for advanced wave physics applications.
Area of Science:
- Topological physics
- Wave phenomena
- Materials science
Background:
- Valleytronics commonly utilizes graphene-like structures.
- Existing topological devices often lack multi-way splitting capabilities.
Purpose of the Study:
- To engineer the first three-way topological energy splitter.
- To explore the use of square/rectangular lattices for topological devices.
- To demonstrate adiabatic conversion into wave steerers.
Main Methods:
- Combining four structured domains.
- Breaking mirror symmetries in square lattices.
- Utilizing time-reversal symmetry for interface properties.
Main Results:
- Achieved a three-way topological energy splitter, a first.
- Demonstrated the necessity of square/rectangular lattices over graphene.
- Showcased adiabatic conversion to a wave steerer.
- Tuned energy and directionality via geometry.
Conclusions:
- The novel splitter design offers unprecedented control over wave propagation.
- Geometrically tunable properties open avenues for beam-splitters, switches, and filters.
- This work advances topological energy splitting beyond conventional methods.
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