CVD grown selenium spherical resonators for mid-infrared meta-optics

Danveer Singh; Tomer Lewi; Doron Naveh; Michal Poplinger

doi:10.1117/12.2611137

5 March 2022 CVD grown selenium spherical resonators for mid-infrared meta-optics

Danveer Singh, Tomer Lewi, Doron Naveh, Michal Poplinger

Proceedings Volume PC12011, High Contrast Metastructures XI; PC120110S (2022) https://doi.org/10.1117/12.2611137
Event: SPIE OPTO, 2022, San Francisco, 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. We also show the resonance pinning effect near the substrate ENZ value, which is manifested in size-independent resonances.

Conference Presentation

Citation Download Citation

Danveer Singh, Tomer Lewi, Doron Naveh, and Michal Poplinger "CVD grown selenium spherical resonators for mid-infrared meta-optics", Proc. SPIE PC12011, High Contrast Metastructures XI, PC120110S (5 March 2022); https://doi.org/10.1117/12.2611137

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