We propose and design a flat and tunable terahertz lens achieved through a two-
dimensional photonic crystal composed of an array of rods made of a Dirac semimetal …

Based on the triangular lattice two-dimensional photonic crystal (PC), the lattice spacing
along the transverse direction to propagation is altered, and a gradient PC (GPC) flat lens is …

In this paper, the characteristics of the complete photonic band gaps for two-dimensional
nonlinear plasma photonic crystals are studied theoretically by using the finite-difference …

In this paper, we propose two types of all-dielectric polarization-independent graded index
annular flat lens with a wide operating frequency range. The lenses are composed of two …

The importance of transmission, guiding and delivery of electromagnetic waves to the
targeted part of a photonic circuit, leads to design couplers with high coupling efficiency. In …

In this paper, the finite-difference time-domain, pulse wave expansion method are the major
methods used to study characteristics of photonic band gaps in photonic crystals. The 2D …

In this paper, a non-Hermitian two-dimensional photonic crystal flat lens is proposed. The
negative refraction of the second band of photonic crystal is utilized to realize super …

In this paper, the characteristics of the complete photonic band gaps for two-dimensional
nonlinear plasma photonic crystals are studied theoretically by using the finite-difference …