Subwavelength mie-resonant selenium resonators for mid-infrared meta-optics

Danveer Singh

doi:10.1117/12.2597756

1 August 2021 Subwavelength mie-resonant selenium resonators for mid-infrared meta-optics

Danveer Singh

Proceedings Volume 11795, Metamaterials, Metadevices, and Metasystems 2021; 1179512 (2021) https://doi.org/10.1117/12.2597756
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

Efficient light manipulation at subwavelength scales in the mid-infrared (MIR) region is essential for various applications and can be harnessed from intrinsic low-loss dielectric resonators. Here, we demonstrate the fabrication of truncated spherical selenium (Se) resonators with tunable high-quality (Q) factor Mie resonances. Large area amorphous Se subwavelength resonators of varying sizes were grown on different substrates, using a novel CVD process. We demonstrate size-tunable Mie resonances spanning the 2-16 µm range, for single isolated resonators and large area ensembles, respectively. We show strong tunable absorption resonances (90%) in ensembles of resonators in a significantly broad MIR range. Moreover, by coupling resonators to epsilon-near-zero (ENZ) substrates, we engineer high-Q resonances as high as Q=40. These findings open up new possibilities in meta-atom paints, anti-reflective coatings, detection technology, and large area metasurface fabrications.

Conference Presentation

Citation Download Citation

Danveer Singh "Subwavelength mie-resonant selenium resonators for mid-infrared meta-optics", Proc. SPIE 11795, Metamaterials, Metadevices, and Metasystems 2021, 1179512 (1 August 2021); https://doi.org/10.1117/12.2597756

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