Perfect cylindrical cloak under gyration, Non-inertial effects make perfect cloak visible

TL;DR

This paper investigates how non-inertial effects from rotational motion influence the visibility of a cylindrical perfect cloak, showing that high rotational speeds can make the cloak detectable through scattering pattern distortions.

Contribution

It introduces a simulation of non-inertial effects on perfect cloaks using FDTD methods and proposes a method to measure rotational velocity via electric field phase retardation.

Findings

Non-inertial effects can make perfect cloaks detectable at high rotational speeds.

Waveform distortion increases with rotational frequency, affecting cloaking performance.

Scattering patterns depend on the rotation direction, enabling velocity measurement.

Abstract

In this study, the impact of non-inertial effects, caused by rotational motion, on the cylindrical perfect cloak is simulated. Also, the interactions between plane waves, Gaussian sine, and Gaussian pulse are investigated. it is shown that non-inertial perfect cloak could be detectable with the Sagnac and magnetoelectric effects.at low frequency of gyration, the distortion of waveform pattern is humble and negligible, however when the rotational frequency increases, the pattern distortion becomes huge and wavelets are formed and their intensity grows up. the scattering pattern can be influenced by the direction of rotation, thus, the direction of rotation could be identified with the scattering pattern analysis. Also, a method for measuring rotational velocity can be prepared concerning the electric field phase retardation. the simulation is computed using the FDTD methods by transforming the Maxwell's equations from non-inertial frameworks to the lab framework.