The so-called generalized Kerker results enable gentle to be scattered in a particular path utilizing all-dielectric nanostructures. Nevertheless, these results solely exist for a particular polarization or are polarization-independent.
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Polarization-controlled twin lattice Kerker results in periodic silicon nanorods had been proposed and experimentally demonstrated by a analysis group led by Dr. Guangyuan Li of the Chinese language Academy of Sciences’ Shenzhen Institute of Superior Know-how (SIAT).
These findings allow energetic tuning of the Kerker results by modifying the incidence polarization or angle, and they are often employed in a wide range of purposes, equivalent to manipulating the dispersed gentle’s path, polarization, and section, which is essential in nanophotonic chips.
This analysis was launched within the journal Nano Analysis.
Within the duel-lattice Kerkler results, the incident angles (zero reflection and unitary transmission), or lattice Kerker angles, might be similar or totally different for the s- and p-polarizations, primarily based on the diameter and peak of the silicon nanodisks. By adjusting the lattice durations in each orientations, these lattice Kerker angles might be fine-tuned throughout a variety.
Different generalized Kerker results talked about within the literature function primarily underneath regular incidence and are achieved by altering the geometry parameters. This necessitates precise parameter choice and manufacturing.
By introducing the lattice impact, the so-called lattice Kerker impact might be realized by various the incident angle. This benefit permits energetic tuning of the Kerker impact in an as-fabricated pattern, and thus considerably facilitates the design and fabrication.
Dr. Guangyuan Li, Research Group Lead, Shenzhen Institute of Superior Know-how, Chinese language Academy of Sciences
When p-polarized gentle obliquely illuminates the periodic silicon nanodisks, high-order multipoles like electrical and magnetic quadrupoles turn into concerned and essential.
Subsequently, the electrical dipole floor lattice resonance (ED-SLR) underneath p-polarization and the magnetic dipole floor lattice resonance (MD-SLR) underneath s-polarization have totally different dispersion ratios, leading to distinct lattice Kerker angles for the s- and p-polarizations.
Xiong, L., et al. (2022) Polarization-controlled twin resonant lattice Kerker results. Nano Analysis. doi.org/10.1007/s12274-022-4988-9.