High resolution terajets using 3D cuboids

The limit imposed intrinsically by the diffraction of electromagnetic waves has been extensively studied with the aim to improve the performance of microscopy techniques and to obtain subwavelength resolution. Several techniques have been proposed to solve this disadvantage such as metamaterials and microspherical particles, to name a few

Role of the tangential electric field component to the terahertz jet and hook formation by dielectric cube and sphere

The mechanism of formation of a terahertz jet by a dielectric cuboid and a sphere surrounded by ideally conducting screens is considered. The maximum screen influence is observed when the screen is located near the alight cuboid base. The screen influence eases when the screen is shifting along the dielectric object. Power flux density localization area is almost completely shifted inside the object when the screen is situated in the center. The minimum influence is observed when screen placed in the shadow plane of the cuboid base. This effect caused by the screen influence on electric field component tangential to the side edges and thus on the power flux directed to the central axis of the object. The screen influence on the terahertz jet in spherical object has been compared. Value of the power flux density after passing the object is higher in a cuboid, but the focusing characteristics are better (appearing on shorter distances) in a sphere

Experimental observation of a photonic hook

Applied Physics Letters journal paper entitled "Experimental observation of a photonic hook".Other funders supporting this work in addition to EC Grant 737164: Russian Science Foundation, Project No. 17-79-20346. , Ser Cymru National Research Network (NRNF66), Tomsk Polytechnic University Competitiveness Enhancement Program