44 citations · 266 across the 20 of their papers we have counts for
20 papers
Sub-structure characteristic mode analysis of microstrip antennas using a global multi-trace formulation
Ran Zhao, Yuyu Lu, Guang Shang Cheng +3
A characteristic mode (CM) method that relies on a global multi-trace formulation (MTF) of surface integral equations is proposed to compute the modes and the resonance frequencies…
A Coupled Hybridizable Discontinuous Galerkin and Boundary Integral Method for Analyzing Electromagnetic Scattering
Ran Zhao, Ming Dong, Liang Chen +2
A coupled hybridizable discontinuous Galerkin (HDG) and boundary integral (BI) method is proposed to efficiently analyze electromagnetic scattering from inhomogeneous/composite obj…
A Time Domain Volume Integral Equation Solver to Analyze Electromagnetic Scattering from Nonlinear Dielectric Objects
Sadeed Bin Sayed, Rui Chen, Huseyin Arda Ulku +1
A time domain electric field volume integral equation (TD-EFVIE) solver is proposed for analyzing electromagnetic scattering from dielectric objects with Kerr nonlinearity. The non…
Solution of Volume Integral and Hydrodynamic Equations to Analyze Electromagnetic Scattering from Composite Nanostructures
Doolos Aibek Uulu, Rui Chen, Liang Chen +2
A coupled system of volume integral and hydrodynamic equations is solved to analyze electromagnetic scattering from nanostructures consisting of metallic and dielectric parts. In t…
On the Spurious Interior Resonance Modes of Time Domain Integral Equations for Analyzing Acoustic Scattering from Penetrable Objects
Rui Chen, Yifei Shi, Sadeed Bin Sayed +2
The interior resonance problem of time domain integral equations (TDIEs) formulated to analyze acoustic field interactions on penetrable objects is investigated. Two types of TDIEs…
Analysis of Screening Effects on Terahertz Photoconductive Devices using a Fully-Coupled Multiphysics Approach
Liang Chen, Hakan Bagci
The terahertz current generated by a photoconductive device (PCD) saturates as the power of the input optical pump is increased. This behavior is induced by various screening effec…
Calculation of Photocarrier Generation from Optical Absorption for Time-domain Simulation of Optoelectronic Devices
Liang Chen, Ming Dong, Ran Zhao +1
Photocarrier generation rate in optoelectronic materials is often calculated using the Poynting vector in the frequency domain. However, this approach is not accurate in time-domai…
A Memory-efficient Implementation of Perfectly Matched Layer with Smoothly-varying Coefficients in Discontinuous Galerkin Time-Domain Method
Liang Chen, Mehmet Burak Ozakin, Shehab Ahmed +1
Wrapping a computation domain with a perfectly matched layer (PML) is one of the most effective methods of imitating/approximating the radiation boundary condition in Maxwell and w…
A hybridizable discontinuous Galerkin method for simulation of electrostatic problems with floating potential conductors
Liang Chen, Ming Dong, Ping Li +1
In an electrostatic simulation, an equipotential condition with an undefined/floating potential value has to be enforced on the surface of an isolated conductor. If this conductor…
Efficient Discontinuous Galerkin Scheme for Analyzing Nanostructured Photoconductive Devices
Liang Chen, Kostyantyn Sirenko, Ping Li +1
Incorporation of plasmonic nanostructures in the design of photoconductive devices (PCDs) has significantly improved their optical-to-terahertz conversion efficiency. However, this…
Multiphysics Simulation of Plasmonic Photoconductive Devices using Discontinuous Galerkin Methods
Liang Chen, Hakan Bagci
Plasmonic nanostructures significantly improve the performance of photoconductive devices (PCDs) in generating terahertz radiation. However, they are geometrically intricate and re…
ANN-assisted CoSaMP Algorithm for Linear Electromagnetic Imaging of Spatially Sparse Domains
Ali I. Sandhu, Salman A. Shaukat, Abdulla Desmal +1
Greedy pursuit algorithms (GPAs) are widely used to reconstruct sparse signals. Even though many electromagnetic (EM) inverse scattering problems are solved on sparse investigation…
An Accelerated Nonlinear Contrast Source Inversion Scheme For Sparse Electromagnetic Imaging
Ali I. Sandhu, Abdulla Desmal, Hakan Bagci
An efficient nonlinear contrast source inversion scheme for electromagnetic imaging of sparse two-dimensional investigation domains is proposed. To avoid generating a sequence of l…
Steady-state Simulation of Semiconductor Devices using Discontinuous Galerkin Methods
Liang Chen, Hakan Bagci
Design of modern nanostructured semiconductor devices often calls for simulation tools capable of modeling arbitrarily-shaped multiscale geometries. In this work, to this end, a di…
Scattering theory and cancellation of gravity-flexural waves of floating plates
Mohamed Farhat, Pai-Yen Chen, Hakan Bagci +2
We combine theories of scattering for linearized water waves and flexural waves in thin plates to characterize and achieve control of water wave scattering using floating plates. T…
Computation of Electromagnetic Fields Scattered From Objects With Uncertain Shapes Using Multilevel Monte Carlo Method
Alexander Litvinenko, Abdulkadir C. Yucel, Hakan Bagci +3
Computational tools for characterizing electromagnetic scattering from objects with uncertain shapes are needed in various applications ranging from remote sensing at microwave fre…
Extreme Scale FMM-Accelerated Boundary Integral Equation Solver for Wave Scattering
Mustafa Abduljabbar, Mohammed Al Farhan, Noha Al-Harthi +4
Algorithmic and architecture-oriented optimizations are essential for achieving performance worthy of anticipated energy-austere exascale systems. In this paper, we present an extr…
Flexural Mie Resonances: Localized Surface Platonic Modes
M. Farhat, S. Guenneau, P. Y. Chen +2
Surface plasmons polaritons were thought to exist only in metals near their plasma frequencies. The concept of spoof plasmons extended the realms of plasmonics to domains such as r…
Theory of diffusive light scattering cancellation cloaking
Mohamed Farhat, Pai-Yen Chen, Sebastien Guenneau +3
We report on a new concept of cloaking objects in diffusive light regime using the paradigm of the scattering cancellation and mantle cloaking techniques. We show numerically that…
A Stable Higher Order Space-Time Galerkin Scheme for Time Domain Integral Equations
A. J. Pray, Y. Beghein, N. V. Nair +3
Stability of time domain integral equation (TDIE) solvers has remained an elusive goal for many years. Advancement of this research has largely progressed on four fronts: (1) Exact…