We show that ultrathin metasurfaces with a specific multiresonant response can enable simultaneously arbitrarily strong and broadband dispersion compensation, pulse (de)chirping, compression or broadening. This breakthrough overcomes the fundamental limitations of both conventional nonresonant approaches (bulky) modern singly resonant (narrowband) for quadratic phase manipulations electromagnet...

The paper considers some concepts of nonuniform asymptotic stability for skew-evolution semiflows on Banach spaces. The obtained results clarify differences between the uniform and nonuniform cases. Some examples are included to illustrate the results.

The aim of this paper is to present necessary and sufficient conditions for nonuniform power instability property of linear discrete-time systems in Banach spaces. A characterization of the nonuniform power instability in terms of Lyapunov sequences is also given.

In the present paper, the problem of externally excited exponential transmission line hasbeen solved analytically in frequency domain using a simple approach. Then steplines approximationas a first order approximation for the problem of externally excited nonuniform transmission lines ingeneral and exponentially tapered transmission line (ETL) as a special case has been presented.Finally the tw...