Numerical Modeling of Photonic Jet behind Triangular Prism

Abstract

The scattering of electromagnetic plane waves by triangular prism and its truncated form (the isosceles triangle and the trapezoid are transverse sections, respectively) has been studied in order to determine possibility of high field intensity (photonic jet) formation. Using high-resolution finite-difference time-domain simulation, an optimal relationship between the wavelength and the size of the prism was found to form photonic jet with sub wavelength waist on the shadow side of the prism. Truncation of the prism (with trapezoids as transverse sections) leads to an improvement in the characteristics of photonic jets (intensity, length and waist). A qualitative explanation of the simulation results obtained is presented.

Numerical Modeling of Radiation Focusing by Dielectric Microcylinders with Several Layers

“…In their research, scientists try to optimize the nanojet in such a way as to obtain the most compact light spot with maximum intensity in focus and maximum length. There are many articles on the generation and optimization of nanojets using different optical elements [17][18][19][20][21][22][23][24][25][26]. In study [18] authors report about narrow photonic nanojet which is formed by an engineered two-layer microcylinder of high refractive-index materials.…”