Helical and chiral plasma structures are ubiquitous, especially in nuclear fusion devices and space plasmas. However, the spontaneous formation of helical structures has rarely been noticed in non-equilibrium cold plasma jets that have wide applications in biomedicine and material science. Recently the chiral plasma plume without any notable asymme...
Contact bounce is a common phenomenon in the closing process of electromagnetic relays, which seriously affects the electrical contact reliability of the system. The whole closing process of flexible spring components consists of the free movement stage and the contact bounce stage, which increases the complexity of analyzing the electrical contact...
Efficient strategies for non-destructive testing of damaged composite laminates modeled from homogenization of fiber-reinforced polymers could in- volve fused data. Here, those are from electromagnetic and infrared thermographic modalities, for which semi-analytical models of the interaction are available. Focus is on inter-layer delaminations. Pat...
This work introduces a penalty-based regularisation to optimise the geometric parameters of a periodic frequency selective surface. The equivalent circuit of a multi-layer bandpass filter is used to illustrate the benefits of the approach for wideband applications. The proposed regularisation is obtained by convolving the frequency response and the...
This work introduces a penalty-based regularisation to optimise the geometric parameters of a periodic frequency selective surface. A multi-layer bandpass filter with an equivalent circuit is used to illustrate the benefits of the approach for wide band applications. The proposed regularisation is obtained by convolving the frequency response and t...
A reconfigurable reflectarray antenna with beam steering is presented in the thesis. The reflectarray system includes a reconfigurable reflecting surface and a feed antenna. The reflecting surface of the reflectarray antenna is composed of a periodic arrangement of unit cell elements where each cell has an embedded varactor for reconfigurability. T...
Multichannel coil array systems offer precise spatiotemporal electronic steering and patterning of electric and magnetic fields without the physical movement of coils or magnets. This capability could potentially benefit a wide range of biomagnetic applications such as low-intensity noninvasive neuromodulation or magnetic drug delivery. In this reg...
Several strategies are available for solving the inverse source problem in electromagnetics. Among them, many have been focusing in retrieving Love currents by solving, after regularization, for Love’s electric and magnetic currents. In this work we present a dual-element discretization, analysis, and stabilization of an inverse source formulation ...
Photon spin has received great interest in the recent decades for many applications such as encoding quantum information and spin-filtering. However, very little is known about controlling the direction and properties of the spin. It was recently found that surface waves with evanescent tails possess an inherent in-plane transverse spin which is de...
Photoconductive terahertz devices require ultrafast (
