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A novel time-domain volume integral equation (TD-VIE) is proposed to analyze the transient electromagnetic scattering from inhomogeneous dispersive objects. In this TD-VIE method, the higher order Nyström method is applied in spatial domain. Namely, the curvilinear tetrahedron elements are utilized to discretize dielectric objects and resulting unknowns are volume electric current density. The Lagrange...
The parabolic equation (PE) method is derived from the wave equation, and it has been widely used to solve electromagnetic wave propagation problems. In recent years, it was realized that the PE method can also be applied to scattering problems. The PE method meets the demand for higher efficiency and accuracy at the same time when there are limited computational resources. In this paper, both co-polarized...
In this paper, physical model for microwave pulse coupling into cavities through narrow slots is presented, and the equation for predicting the dependence of coupling on the polarization directions of the incident pulse is derived. The modified FDTD method is used to simulate the coupling process. We observe the resonant and enhancement effects which occur in the process, and present the condition...
A comparative investigation of γ-ray total dose ionization damage at high and low-level injection (HLI/LLI) for different dose rate irradiation in double polysilicon self-aligned bipolar NPN transistors is presented. The transistors reveal anomalous dose rate radiation responses for Emitter-Base (E-B) electrical field strength in forward active mode. This effect is probably associated with the different...
In this paper, microwave breakdown is analyzed in arbitrarily-shaped waveguide with the help of the Spectral Element Method (SEM). Both the electromagnetic fields distributed in the structure and the free electron continuity equation are solved by the SEM. Based on such a highly accurate numerical method, both tail-erosion phenomenon in time domain and bandwidth broaden in frequency domain caused...
A marching-on-in-degree (MOD) solution of the time-domain combined field integral equation (TD-CFIE) with Nystrom scheme is proposed to analyze transient electromagnetic scattering from arbitrarily shaped perfect electrically conducting (PEC) objects. In this scheme, the Lagrange interpolation polynomials and weighted Laguerre polynomials are used to represent the spatial and temporal basis functions,...
Recently, much attention have been drawn to converse magnetoelectric(CME) effect, as well as electric field modulated transport properties in magnetoelectric heterostructure composites[1-3]. In situ Electric field (E) modulating magnetic and electric transport properties have be well achieved in magnetoelectric bilayer films[2-4]. These excellent investigations open a new pathway to the electronic...
An optical coupler composed of gold cylinder arrays overlaid with a gold film was proposed for quantum well infrared photo-detector. Finite difference time-domain method was used to numerically investigate the near-field enhancement. The result showed that for the x-polarized light normally incident from the backside, strong electric field component perpendicular to the quantum well can be generated,...
In this paper, the effects of the thickness of the multiplication region (Tm), the sheet charge density of the charge control layer (Dc) and the guard ring design to a separate absorption, grading, charge, and multiplication InGaAs/InP single photon avalanche diode (SPAD)'s performance are numerically discussed. Optimized Tm and Dc are designed for a SPAD. Implanted guard ring is revealed to be easier...
Based on the new finding on switching behavior, for the first time a new memory operation principle is proposed to control the switching and to achieve improved performance of oxide-based RRAM including device-to-device and cycle-to-cycle uniformity, RESET current, and window of RHRS/RLRS ratio. Furthermore, a numerical simulation method is developed to evaluate the validity of the new operation principle...
This paper is a study on the numerical solution of linear systems arising from the discretization of the improved electric field integral equation (IEFIE) for electromagnetic scattering problems. Using incomplete LU factorization preconditioner, the IEFIE is solved by generalized minimal residual iterative method in the context of the multilevel fast multipole algorithm (MLFMA). Numerical results...
Floating gate (FG) devices using barrier-engineered (BE) tunneling dielectric have been studied both theoretically and experimentally. Through WKB modeling the tunneling efficiency of various multi-layer tunneling barriers can be well predicted. Experimental results for FG devices with oxide-nitride-oxide (ONO) U-shaped barrier are examined to validate our model. Furthermore, a large-density array...
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