Deep subwavelength light localization in ultra-high index topological insulator nanostructures

Tomer Lewi

doi:10.1117/12.2651144

17 March 2023 Deep subwavelength light localization in ultra-high index topological insulator nanostructures

Tomer Lewi

Proceedings Volume PC12432, High Contrast Metastructures XII; PC124320D (2023) https://doi.org/10.1117/12.2651144
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

In nanophotonic, small mode volumes, narrow resonance linewidths and field enhancements, fundamentally scales with refractive index values and are key for many implementations involving light-matter interactions. Topological insulators (TI) are a class of insulating materials that host topologically protected surface states, some of which exhibit very high permittivity values. In this talk, I will discuss our latest results on Bi2Te3 and Bi2Se3 TI nanostructures. Using polarized far-field and near field nanospectroscopy we reveal that Bi2Se3 nanobeams exhibit mid-infrared resonant modes with 2π 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 light localization in ultra-high index topological insulator nanostructures", Proc. SPIE PC12432, High Contrast Metastructures XII, PC124320D (17 March 2023); https://doi.org/10.1117/12.2651144

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