Scattering properties ofPT- symmetric layered periodic structures

Absorption in periodic layered structures

Photonic band structure of metal-dielectric and semiconductor-dielectric layered structures are studied in the presence of a strong absorption. It is shown that absorption can enlarge some gaps by as much as 50%. # 2001 Elsevier Science B.V. All rights reserved.

Electromagnetic Wave Scattering in Random Layered Structures

Efficient Modeling of Electromagnetic Scattering by Symmetric Lamellar Periodic Structures at Normal Incidence

An efficient modeling of the electromagnetic scattering properties of symmetric lamellar periodic structures at normal incidence is discussed within the framework of the modal-field approach. By taking advantage of the inherent symmetry, a numerical computational speedup of up to 8 times can be achieved by explicitly ignoring anti-symmetric modes, which play no role in the scattering process at...

Scattering properties of PT-symmetric objects

We investigate the scattering response of parity-time (PT) symmetric structures. We show that, due to the local flow of energy between gain and loss regions, such systems can deflect light in unusual ways, as a function of the gain/loss contrast. Such structures are highly anisotropic and their scattering patterns can drastically change as a function of the angle of incidence. In addition, we d...

Wave Packets Scattered by Non-periodic Bragg-type Layered Structures

The time delay, space shift and widening of wave packet transmitted and reflected by structures with Bragg mirrors have been investigated. The specific structures such as Bragg mirrors, resonators, and structures with chirp variation of thickness of the “period” have been considered. The calculation has been carried out under the conditions that carrier frequency, and incidence angle is in the ...