Propagation characteristics play a fundamental role in the design and implementation of radio systems. The application of broadband digital data services within the cordless environment requires close consideration of the dispersive nature of radio channels. A prediction algorithm is presented such that propagation characteristics can be estimated for small cell high data rate systems. Through ...

We experimentally demonstrate the first method to focus light inside disordered photonic metamaterials. In such materials, scattering prevents light from forming a geometric focus. Instead of geometric optics, we used multi-path interference to make the scattering process itself concentrate light on a fluorescent nanoscale probe at the target position. Our method uses the fact that the disorder...

Reconfigurable intelligent surfaces (RISs) are one of the potential technologies for 6th generation (6G) mobile communication systems with superior electromagnetic (EM) wave-steering capability to effectively control phase, amplitude, and polarization incident EM wave. An implementation-independent physical RIS model key characteristics is especially crucial channel modeling considering trade-o...

The space L of oriented lines, or rays, in R 3 is a 4-dimensional space with an abundance of natural geometric structure. In particular, it boasts a neutral Kähler metric which is closely related to the Euclidean metric on R 3. In this paper we explore the relationship between the focal set of a line congruence (or 2-parameter family of oriented lines in R 3) and the geometry induced on the ass...

This Colloquium reviews the role of geometric phases in optics from perspective fiber bundle theory. The transformation polarization light by discrete optical components illustrates many elements theoretical formalism, and an outlook is presented for study application higher dimensions through analyses order Gaussian modes general vectorial fields.

The non-linear random Schrodinger equation via geometric distribution and expo?nential is considered. We carry out the unified solver technique to ob?tain some new solutions. statistical distributions are utilized show dispersion input. reported solutions so important in fiber optics their applications. expectation for drawn behaviour of

Abstract Geometric arrays of vortices found in various systems owe their regular structure to mutual interactions within a confined system. In optics, such vortex crystals may form spontaneously resonator. Their crystallization is relevant many areas physics, although usefulness limited by the lack control over topology. On other hand, programmable devices like spatial light modulators allow de...

We construct a class of numerical schemes for the Liouville equation of geometric optics coupled with the Geometric Theory of Diffractions to simulate the high frequency linear waves with a discontinuous index of refraction. In the work [26], a Hamiltonian-preserving scheme for the Liouville equation was constructed to capture partial transmissions and reflections at the interfaces. These schem...