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

Multispectral Photonic Jet Shaping and Steering by Control of Tangential Electric Field Component on Cuboid Particle

“…As shown in Figure 7c,d, the amplitude of the tangential electric field component declines in the propagation direction and increases in the opposite direction of the wave propagation. The details of the displacement of the power flow density concentration region across and in the propagation direction have been described in Reference [22]. It can be seen from Figure 7a,b that the PJ intensity distribution varies from the sword type to the dagger type.…”

“…More importantly, the focusing parameters of the PJ are tuned in both the z-and y-directions by placing the masks near the side faces of the DMC. The nature of considered effects is described by tangential field components during the formation of the PJ [22]. In the presence of the metal masks alongside the DMC faces, a reflected wave appears because the field component disappears at the contact area.…”

“…The asymmetric interference structure of the localized field distributions along the radiation propagation axis is also clearly visible, which manifests the effect on the presence of a one-sided mask. The control of the tangential electric field component is carried out by using a metal mask placed along the dielectric side surfaces of a cubic particle, which has a thickness greater than the thickness of the skin layer [22]. For ease of experimental demonstration of this effect, we employ a thick mask with a width equal to the cubic size in this study.…”

“…For ease of experimental demonstration of this effect, we employ a thick mask with a width equal to the cubic size in this study. In contrast, the effect of a thin mask has been demonstrated in Reference [22]. The two components of the Poynting vectors for the DMC without and with masks are considered to clarify the effect of the thick mask on the PJ shaping.…”

“…The field intensity distributions of the PJ shape depend significantly on the optical properties and size of the generating particle materials as well as the shape and polarization state of illuminating waves [21]. Additionally, the modulation of PJ properties by dielectric spherical and cuboid particles surrounded with ideally conducting thin masks has been theoretically investigated [22]. It is observed that the effect of a thin Photonics 2021, 8, 317 2 of 12 mask on the PJ properties depends on the mask position along with the dielectric particles.…”