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Switchable anapole states in Sb2Se3-based phase-change nanoresonators.
Applied Optics
|June 10, 2026
Summary
This study shows antimony triselenide (Sb2Se3) nanostructures can switch between optical states. This phase-change material enables tunable nanophotonic devices and programmable metasurfaces.
Area of Science:
- Nanophotonics
- Materials Science
- Metasurfaces
Background:
- Phase-change materials offer tunable optical properties for nanophotonic devices.
- Controlling radiative and non-radiative modes is key for integrated photonics.
- Antimony triselenide (Sb2Se3) is explored for its nanophotonic potential.
Purpose of the Study:
- To demonstrate Sb2Se3 nanostructures supporting multiple Mie resonance modes.
- To show reversible switching between electric dipole and anapole states using Sb2Se3 phase transitions.
- To provide a building block for dynamic and programmable nanophotonic devices.
Main Methods:
- Fabrication of Sb2Se3 nanoresonators.
- Characterization of Mie resonance modes (electric dipole, anapole states).
- Inducing and observing phase transitions in Sb2Se3 via optical or thermal means.
Main Results:
- Sb2Se3 nanoresonators support electric dipole and anapole states.
- Reversible switching between ED and anapole states achieved through Sb2Se3 phase change.
- Phase transition causes significant refractive index change, modulating multipole interference and resonance.
Conclusions:
- Sb2Se3 enables non-volatile, high-contrast switching in nanophotonic devices.
- This work presents a novel approach for tunable and reconfigurable metasurfaces.
- The findings pave the way for advanced dynamic nanophotonic applications.
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