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In the past, it has been demonstrated that it is possible to produce terajets with high resolution at its focus using 3D dielectric cuboids under plane-wave illumination. Here, a systematic study of the harmonic and angular response of terajets using cuboids is performed. Mutifrequency focusing is demonstrated at the fundamental frequency and two higher(More)
The bulk of theoretical studies are devoted to the light jets originated from microparticles with high degree of spatial symmetry like spheres, spheroids, cylinders, disks because of their unique capability to produce extreme spatial field localization. In the current paper we brief review the modern state-of-the art of main principles of the photonic jet(More)
A photonic jet (a terajet at terahertz frequencies) commonly denotes a specific, spatially localized region in the near field on the front side of a dielectric particle with a diameter comparable with the wavelength illuminated by a plane wave on its back side (i.e., the jet emerges from the shadow surface of a dielectric particle). In this Letter, the(More)
In this Letter, we demonstrate applicability of Babinet's principle of complementary diffractive structures for the formation of near-field photonic jets in the reflection mode. Structures, complementary to dielectric cuboids, are characterized with additional geometric and electromagnetic parameters compared to initial cuboids and, for this reason, offer(More)
In this study, we introduce what we believe is a novel holographic optical element called a chiral square Fresnel zone plate (CSFZP). The chirality is imposed on a square Fresnel zone plate (SFZP) using a nonclassical technique by rotating the half-period zones relative to one another. The rotation of the half-period zones, in turn, twists the side lobes of(More)
This paper outlines some of the recent advances in Fresnel zone plate antenna technology. Sidelobe reduction and control over sidelobe location are two developments which are useful for interference reduction. Another development is the focusing resolution of Fresnel zone plate antennas for sub­wavelength focal distances. Designs will be given for spatial(More)
The task of development of compact light-focusing tools for biomedical applications is challenging due to subwavelength focusing in such devices. In this study we have shown that it is possible to focusing light beyond the diffraction limit by 3D mesoscale particles in application to laser scalpel tips for potential use in ultraprecise laser surgery. The(More)
A structure based on periodically arranged 3D dielectric cuboids connected by photonic nanojets (PNJs) is proposed with the aim of increasing the propagation distance of surface plasmon polaritons (SPPs) at the telecom wavelength of 1550 nm. The performance of the structure is evaluated and compared with the case without the cuboids demonstrating that the(More)