This paper reports the experimental and numerical investigation of plane wave diffraction by an all-dielectric dual-material cuboid, which leads to the generation of a photonic jet in the near-field region. The study examines the dependence of jet behavior and orientation on materials and dimensions of constitutive parts in the microwave frequency domain, demonstrating the possibility to shift and deviate the microwave jet numerically. Experimentally, a shift in the spatial position of the jet is observed, with an asymmetric electric field profile attributed to multiple edge waves generated by the dual-material cuboid in the far-field region. The results presented can be scaled at different frequency bands for designing nanostructures and creating new optical devices for emerging nanophotonic applications.
In this paper, we report the experimental and numerical investigation of plane wave diffraction by an all-dielectric dual-material cuboid. Edge diffraction by a cuboid leads to the generation of a narrow, high intensity beam in the near-field region called a photonic jet. We examine the dependence of the jet behavior and orientation on the materials and dimensions of constitutive parts in the microwave frequency domain. The possibility to shift and deviate the resultant microwave jet in the near-field region of such a structure depending on the size of constitutive parts is demonstrated numerically. Experimentally, we observe a shift in the spatial position of the jet. The experimental asymmetric electric field profile observed in the far-field region is attributed to the input of multiple edge waves generated by the dual-material cuboid. The presented results may be scaled at different frequency bands such as optical frequencies for designing nanostructures enabling the focusing and deviation functionality and creation of new optical devices which would satisfy the needs of emerging nanophotonic applications.
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