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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Subwavelength topological edge States in optically resonant dielectric structures
Alexey P Slobozhanyuk1,2, Alexander N Poddubny2,3, Andrey E Miroshnichenko1
1Nonlinear Physics Center, Australian National University, Canberra ACT 0200, Australia.
Physical Review Letters
|April 11, 2015
Summary
We demonstrate novel photonic topological edge states in dielectric nanoparticle arrays using magnetic Mie resonances. These subwavelength edge modes are experimentally controllable via incident wave polarization.
Area of Science:
- Photonics
- Condensed Matter Physics
- Electromagnetism
Background:
- Topological states of matter offer unique properties like edge state protection.
- Photonic topological states are an emerging area with potential for novel devices.
- Dielectric nanoparticles can support resonant optical responses, such as magnetic Mie resonances.
Purpose of the Study:
- To propose and experimentally verify a novel type of photonic topological edge state.
- To investigate the use of dielectric nanoparticle arrays for topological phenomena.
- To demonstrate control over these edge states using polarization.
Main Methods:
- Theoretical proposal of photonic topological edge states in zigzag dielectric nanoparticle arrays.
- Proof-of-principle microwave experiments using dielectric spherical particles.
- Experimental manipulation of subwavelength topologically protected electromagnetic edge modes.
Main Results:
- Successful verification of photonic topological edge states in the proposed system.
- Demonstration of the ability to control edge mode properties by altering incident wave polarization.
- Observation of subwavelength confinement of electromagnetic energy.
Conclusions:
- Zigzag arrays of dielectric nanoparticles support novel photonic topological edge states.
- Optically induced magnetic Mie resonances are key to realizing these states.
- Polarization control offers a pathway for tunable topological photonic devices.
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