35 citations · 192 across the 12 of their papers we have counts for
12 papers
A Directivity-Dependent Rician K-Factor Model for Indoor Industrial Channels
Dimitrios C. Tzarouchis
We derive a physics-based, closed-form model linking antenna directivity to the root-mean-square (RMS) delay spread and mean excess delay in large reverberant indoor environments.…
Metamaterial-inspired Wearable Pad for Enhancing EM Coupling with Biological Tissues
Maria Koutsoupidou, Dimitrios C. Tzarouchis, Dionysios Rompolas +3
Wearable, implantable, and ingestible antennas are continuously evolving in biomedical applications, as they are crucial components in devices used for monitoring and controlling p…
Optical Tellegen metamaterial with spontaneous magnetization
S. S. Jazi, I. Faniayeu, R. Cichelero +5
The nonreciprocal magnetoelectric effect, also known as the Tellegen effect, promises a number of groundbreaking phenomena connected to fundamental (e.g., electrodynamics of axion…
Programmable wave-based analog computing machine: a metastructure that designs metastructures
Dimitrios C. Tzarouchis, Brian Edwards, Nader Engheta
The ability to perform mathematical computations using metastructures is an emergent paradigm that carries the potential of wave-based analog computing to the realm of near-speed-o…
Inverse-designed Metastructures Together with Reconfigurable Couplers to Compute Forward Scattering
Vahid Nikkhah, Dimitrios C. Tzarouchis, Ahmad Hoorfar +1
Wave-based analog computing in the forms of inverse-designed metastructures and the meshes of Mach-Zehnder interferometers (MZI) have recently received considerable attention due t…
Mathematical Operations and Equation Solving with Reconfigurable Metadevices
Dimitrios Tzarouchis, Mario Junior Mencagli, Brian Edwards +1
Performing analog computations with metastructures is an emerging wave-based paradigm for solving mathematical problems. For such devices, one major challenge is their reconfigurab…
Lower Bounds to the Q factor of Electrically Small Resonators through Quasistatic Modal Expansion
Mariano Pascale, Sander A. Mann, Dimitrios C. Tzarouchis +3
The problem of finding the optimal current distribution supported by small radiators yielding the minimum quality (Q) factor is a fundamental problem in electromagnetism. Q factor…
Resonances in small scatterers with impedance boundary
Ari Sihvola, Dimitrios C. Tzarouchis, Pasi Ylä-Oijala +2
With analytical (generalized Mie scattering) and numerical (integral-equation-based) considerations we show the existence of strong resonances in the scattering response of small s…
Polarizability of Radially Inhomogeneous Subwavelength Spheres
Dimitrios C. Tzarouchis, Ari Sihvola
In this work the polarizability of a subwavelength core-shell sphere is considered, where the shell exhibits a radially inhomogeneous permittivity profile. A mathematical treatment…
Resonant Scattering Characteristics of Homogeneous Dielectric Sphere
Dimitrios C. Tzarouchis, Pasi Ylä-Oijala, Ari Sihvola
In the present article the classical problem of electromagnetic scattering by a single homogeneous sphere is revisited. Main focus is the study of the scattering behavior as a func…
General Scattering Characteristics of Resonant Core-Shell Spheres
Dimitrios C. Tzarouchis, Ari Sihvola
This article presents and discusses the general features and aspects regarding the electromagnetic scattering by a small core-shell plasmonic sphere. First, the thickness effects o…
Unveiling the scattering behavior of small spheres
Dimitrios C. Tzarouchis, Pasi Ylä-Oijala, Ari Sihvola
A classical way for exploring the scattering behavior of a small sphere is to approximate Mie coefficients with a Taylor series expansion. This ansatz delivered a plethora of insig…