Metamaterial simulation methodology lumerical support. In order to validate our model we carry out separate simulations for a variety of waveguide core thickness. The fdtd computation can be significantly accelerated when gpus are used instead of only central processing units cpus. As in this code we see that there is some sudden frequency where it can only transmit signal, so that frequency where the both mue and epsilons. Find the trial package that best addresses your goals.
We explain how the fast fdtd simulation of largescale metamaterials can be achieved. Fdtd modeling of lorentzian dng metamaterials by auxiliary. The perfectly matched layer pml boundary conditions have the best. Fdtd study of guided modes in nanoplasmonic waveguides. In this paper, the formulation of ade scheme for fdtd formulation in normal dps as well as dngbased materials is carried out. Fdtd analysis of slow light propagation in negative. Uk for providing the omnisim, fdtd simulation tool and for helpful and. Using finitedifference timedomain fdtd simulations we investigate the propagation of light pulses in waveguides having a core made of a negativerefractiveindex metamaterial. This simulation also shows that the source wave gets refocused at the right end of the metamaterial slab which has the same distance as that between the source wave location and the interface. Our implementation could be used to improve the analysis of a number of electromagnetic problems. Offnormal incidence simulations of metamaterials using. In this work, we experimentally demonstrate a classical analogue of double fano resonances in a planar composite metamaterial possessing tripod plasmonic resonances, where a common subradiant dipole corresponding to the dark mode is coupled with two superradient dipoles corresponding to two bright modes. A 3d view of the simulation setup is shown in figure 2 lumerical fdtd is used to optimize the transmission, reflection and absorption characteristics of the thz metamaterial absorber.
Some previously reported mtms, such as the invisibility cloak, the field rotator, and the field concentrator, were designed by a linear transformation. How to simulate metamaterials using lumerical and some. To take advantage of the symmetry for shorter simulation time, only half of the 5x5 pixel structure is simulated in heat, as marked by the orange simulation. The frequency dependence of the permittivity and permeability of the metamaterial is. Metamaterial parameter extraction smith lumerical support. Citeseerx large scale fdtd simulation for microoptics. The scheme is based on a graphic processing unit gpuaccelerated finitedifference timedomain fdtd method. Section 2 deals with the formulation of ade method for metamaterials media and fol. Simulation and experiments science 314,997 2006 em cloaking plasmonic luneburg lens. Matlab or octave are used as an easy and flexible scripting interface. A 3d view of the simulation setup is shown in figure 2.
Fdtdspice for characterizing metamaterials integrated. Alldielectric zeroindex metamaterial lumerical support. This site is like a library, use search box in the widget to get ebook that you want. I once considered publishing a book on the finitedifference timedomain fdtd method based on notes i wrote for a course i taught. Gmes is a free finitedifference timedomain fdtd simulation python package developed at gist to model photonic devices. Fdtd simulation on the interaction between gaussian beam. The material parameters of a metamaterial mtm are determined by the transformation function used in the optical transformation. Lumerical fdtd is used to optimize the transmission, reflection and absorption characteristics of the thz metamaterial absorber. We explain how the fast fdtd simulation of largescale. The metamaterial structure is designed through threedimensional finitedifference timedomain method and fabricated on the top metal.
Electromagnetic metamaterials are artificially engineered materials that are designed to interact and control. Introduction materials having negative real parts of both their. The field intensity distributions and phases of tepolarized wave. Finitedifference timedomain simulations of metamaterials. Calculate complex reflectiontransmission coefficients sparameters and extract the effective metamaterial parameters refractive index, impedance, permittivity, permeability. Its features include simulation in 1d, 2d, and 3d cartesian coordinates, distributed memory parallelism on any system supporting the mpi standard, portable to any unixlike system, variuos dispersive. Metamaterial mtm modeling and simulation using the finitedifference timedomain fdtd method is discussed. Note that a useful two dimensional fdtdbased matlab. Numerical methods for metamaterial design download ebook. This repo will contain the scripts in matlab using fdtd to calculate the electric field generated by the metamaterial lens done during my phd saulwigginfdtdsimulationsof. Understand the simulation workflow and key results. Pdf electromagnetic metamaterial simulations using a gpu. A powerful timedomain fdtdspice simulator is implemented and applied to the broadband analysis of metamaterials integrated with active and tunable circuit elements. For the love of physics walter lewin may 16, 2011 duration.
The interaction between gaussian beam and indefinite anisotropic metamaterial amm slabs are simulated with auxiliary differential equation method in finitedifference timedomain method fdtd. Their impedance was matched to the background so that no reflection was found. The directions of wave vector and energy flow densities in three types of amm slabs are investigated. Overview of advantages and disadvantages of the fdtd method in modeling metamaterials. A metamaterial scanning near field optical microscope. Metamaterials simulations with omnisim software photon design. Okay, i can think of several reasons, but im going to ignore them. We present a new numerical simulation scheme for metamaterial research. Summary a method is described for applying fdtd simulation to electromagnetic metamaterial slabs with o. Using remcoms xfdtd software, simulations of devices containing these special materials may be performed metamaterials include such items as negative index materials, electronic band gap structures and frequency selective surfaces.
What it contains solver description fdtd bulk metamaterials fdtd effective parameters smith fdtd chiral materials kwon fdtd thz metamaterial fdtd ghz wire pairs fdtd, device active terahertz resonator fdtd alldielectric zeroindex metamaterial fdtd, device metamaterial absorbers 8. The device suite enables designers to accurately model components where the complex interaction of optical, electronic, and thermal phenomena is critical to performance. Optiwave has been successfully developing fdtd software for over a decade, and would like to show appreciation to the photonics community by distributing its 32bit fdtd product as freeware. The convergence using fetd was found to be more rapid than for fdtd. The effect of the carrier densities on the refractive index of the gaas layer is then calculated. Simulating backward wave propagation in metamaterial with. View enhanced pdf access article on wiley online library html view download pdf for offline viewing.
It is shown that metamaterial origin can be easily understood by placing metamaterials in the more general context of artificial electromagnetic materials and of the efforts performed by the scientific community working in complex. Numerous materials exist that have unusual or frequency dependent properties. To verify the model, some simple cases are simulated with. Design and simulation of i shaped split ring resonator. Numerical solutions to maxwells equations in 3d, 2d, or 1d. Fem simulation is a powerful tool to design the metamaterial and investigate its properties. Schurign,y department of ece, duke university, box 90291, durham, nc 27708, u. Electromagnetic metamaterial simulations using a gpuaccelerated. This example shows how to use fdtd to find the bandstructure of an ideal all dielectric metamaterial that exhibits a zero effective index at optical frequencies. How to simulate metamaterials using lumerical and some literature. This is one of the most challenging parts of fdtd simulations. It is possible to directly measure many quantities of interest from an fdtd simulation of a metamaterial device, including. This demonstrates the effectiveness of fetd for simulations involving metallic structures. The basic fdtd algorithm must be modified at the boundaries of the computational window where suitable numerical absorbing boundary conditions abc are applied.
A range of voltages are applied to the metamaterial via contacts and the corresponding carrier densities are calculated and recorded. Metamaterial is a double negative material where the effective permeability and permittivity are negative. Request pdf offnormal incidence simulations of metamaterials using fdtd. Special materials include frequency dependent models, anisotropic and ferrite materials, and computational extensions to the fdtd method such as sub cellular. Fdtd is a simulator within lumericals device multiphysics simulation suite, the worlds first multiphysics suite purposebuilt for photonics designers. Definitions, properties, applications, and fdtdbased modeling and simulation invited paper.
Electromagnetic metamaterial simulations using a gpu. For the heat transport simulation, we will be considering the following structure based on the paper by du, where the metamaterial absorber is rooted on a silicon substrate by two legs. Simulation, fabrication and characterization of thz. Developed by active researchers and authors of a number of fdtd methodologies. A polarizationdependent normal incident quantum cascade. Fdtd tool is used to simulate the interaction between the. Metamaterials and fdtd based numerical modeling studies. There are several choices for the type of boundary conditions. Pdf fdtdbased metamaterial mtm modeling and simulation. Research articles a method is described for applying fdtd simulation to electromagnetic metamaterial slabs with off. Details on fdtd and fems for metamaterial maxwells equations can be.
Fdtd gpu metamaterial simulation spice electrical and computer engineering electromagnetics and photonics. This repo will contain the scripts in matlab using fdtd to calculate the electric field generated by the metamaterial lens done during my phd saulwiggin fdtd simulationsofa metamaterial lens. Nanophotonic fdtd simulation software lumerical fdtd. Comsol multiphysics in plasmonics and metamateirls 1physics division, national center for theoretical. The design, fabrication, and characterization of a polarizationdependent normal incident quantum cascade detector coupled via complementary splitring metamaterial resonators in the infrared regime are presented. This paper presents a newly developed fdtd technique, referred to as bifdtd, for modeling electromagnetic wave interactions with biisotropic bi media. Click download or read online button to get numerical methods for metamaterial design book now. Simulation of negative index structures with fetd and bloch boundaries. Modeling of metamaterial structures using an extended. Simulation of a single band thz metamaterial absorber. Design and simulation of i shaped split ring resonator metamaterial at optical communication window around 1. If you rerun the simulation with two unit cells, you will end up with exactly the same answer, but it will take at least twice as long to run.
Fdtd modeling of electromagnetic cloaking structures. Openems supports cylindrical coordinates and is specifically developed for mri. So if we hit any gaussian wave on the surface of dng material then some part is reflected and some are transmitted. Electromagnetic metamaterial simulations using a gpuaccelerated fdtd method. The simulation results are compared with the published results by d. Double fano resonances in a composite metamaterial. Finitedifference timedomain simulations of metamaterials a dissertation presented by. To ensure your metamaterial simulations are set up in the most efficient manner, consider applying some of the following techniques to your. First, the fdtdspice modeling theory is studied and details of interprocess communication and hybridization of the two techniques are discussed. Metamaterial 1d simulation using fdtd method and its frequency response are presented on this code.
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