Deep subwavelength resonant meta-optics enabled by high-index topological insulators

Tomer Lewi

doi:10.1117/12.2639459

3 October 2022 Deep subwavelength resonant meta-optics enabled by high-index topological insulators

Tomer Lewi

Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121951T (2022) https://doi.org/10.1117/12.2639459
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

In nanophotonics, small mode volume and high-quality factor (Q-factor) resonances fundamentally scales with high refractive index values. Topological insulators (TI) are a new class of materials possessing narrow bulk bandgap and gapless Dirac surface states, and exhibit ultra high permittivity values. In this work, I will discuss our latest results on Bi2Te3 and Bi2Se3 TI meta-optics. Using polarized far-field and near field Nanospectroscopy we reveal that Bi2Se3 nanobeams exhibit mid-infrared resonant modes with 2pi phase shifts across the resonance. We further demonstrate that Bi2Te3 metasurfaces exhibit deep subwavelength resonant modes utilizing their record high index value peaking at n~11.

Conference Presentation

Citation Download Citation

Tomer Lewi "Deep subwavelength resonant meta-optics enabled by high-index topological insulators", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121951T (3 October 2022); https://doi.org/10.1117/12.2639459

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