Research activities
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 Radar imaging and process tomography
Microwave and mmwave radars allow for imaging
of obscured targets and features, while avoiding undesired ionizing effects.
These properties are also shared by ``softfield'' tomography.
Our group has worked on new radar imaging techniques
for subsurface and obscured targets, as well as on process tomography for industrial applications.
These techniques seek to improve
the way electromagnetic sensors are employed in practice.
keywords—ground penetrating radar (GPR), ultrawideband (UWB) radar, subsurface radar, timereversal (TR) imaging, statistical stability, superresolution,
electrical capacitance tomography (ECT), electrical capacitance volume tomography (ECVT), nondestructive testing and evaluation (NDTE).

R. K. Rasel, C. E. Zuccarelli, Q. M. Marashdeh,
L.S. Fan, and F. L. Teixeira, `
Toward multiphase flow decomposition based on
electrical capacitance tomography sensors,’
IEEE Sensors J., vol. 17, pp. 80278036, 2017.
 S. Y. Chen, W. C. Chew, V. R. N. Santos, K. Sainath, and F. L. Teixeira,
`
Electromagnetic subsurface remote sensing,' Wiley Encyclopedia of Electrical and Electronics Engineering, 2016.
 A. E. Fouda and F. L. Teixeira, `
Bayesian compressive sensing for ultrawideband inverse scattering in random media
,’
Inv. Probl., vol. 30, 114017, 2014.
 A. E. Fouda and F. L. Teixeira, `
Ultrawideband microwave imaging of breast cancer tumors via Bayesian
inverse scattering,’
J. Appl. Phys., vol. 115, 064701, 2014.
 A. E. Fouda and F. L. Teixeira, `Statistical stability of ultrawideband timereversal imaging in random media,’
IEEE Trans. Geosci. Remote Sens., vol. 52, no. 2, pp. 870879, 2014.
 Q. M. Marashdeh, F. L. Teixeira, and L.S. Fan, `
Adaptive electrical capacitance
volume tomography,’
IEEE Sensors J., vol. 14, no. 4, pp. 12531259, 2014.
 A. E. Fouda, M. E. Yavuz, and F. L. Teixeira, `Timereversal techniques for MISO and MIMO wireless communication systems
,’
Radio Sci., vol. 47, no. 6, RS0P02, 2012.
 A. E. Fouda and F. L. Teixeira,
`Imaging and tracking of targets in clutter using differential
timereversal techniques,' (invited paper) Waves in Random and Complex Media, vol. 22, no. 1, pp.66108, 2012.
 M. E. Yavuz and F. L. Teixeira,
`Ultrawideband microwave remote sensing and imaging using timereversal techniques: A review,' (invited paper)
Remote Sens., vol. 1, no. 3, pp. 466495, 2009.
 M. E. Yavuz and F. L. Teixeira ,
`Space–frequency ultrawideband timereversal imaging,'
IEEE Trans. Geosci. Remote Sens., vol. 46, no. 4, pp. 11151124, 2008.
 Q. Marashdeh, W. Warsito, L.S. Fan, and F. L. Teixeira ,
`A multimodal tomography system
based on ECT sensors,'
IEEE Sensors J., vol. 7, no. 3, pp. 426433, 2007.
 M. E. Yavuz and F. L. Teixeira,
`Full timedomain DORT for ultrawideband electromagnetic fields in dispersive, random inhomogeneous media,'
IEEE Trans. Antennas Propagat., vol. 54, no. 8, pp. 23052315, 2006.
 Q. Marashdeh, W. Warsito, L.S. Fan, and F. L. Teixeira ,
`
Nonlinear forward problem solution for electrical
capacitance tomography using
feedforward neural network,'
IEEE Sensors J., vol. 6, no. 2, pp. 441449, 2006.

B. E. Barrowes, C. O. Ao, F. L. Teixeira, and J. A. Kong,
`Sparse matrix/canonical grid method applied to 3D dense medium scattering,'
IEEE Trans. Antennas Propagat. , vol. 51, no. 1, pp. 4858, 2003.

C. D. Moss, F. L. Teixeira, Y.E. Yang, and J. A. Kong,
`Finitedifference timedomain simulation of scattering from objects in continuous random media,'
IEEE Trans. Geosci. Remote Sens., vol. 40, no. 1, pp. 178186, 2002.

C. D. Moss, F. L. Teixeira, J. A. Kong,
`Detection of targets buried in continuous random media: A numerical study using angular correlation function,'
Microwave Opt. Technol. Lett., vol. 33, no. 4, pp. 242247, 2002.

F. L. Teixeira, W. C. Chew, M. Straka, M. L. Oristaglio, and T. Wang,
`Finitedifference timedomain simulation of ground penetrating radar on dispersive, inhomogeneous, and
conductive soils,'
IEEE Trans. Geosci. Remote Sens., vol. 36, no. 6, pp. 19281937, 1998.
 Electromagnetic sensing for geophysical exploration
Welllogging electromagnetic (resistivity) tools with directional capabilities and high sensitivity are
instrumental
for hydrocarbon (oil and gas) exploration in ultradeepwater reservoirs. Directional capabilities enable
horizontal drilling and geosteering, while high sensitivity allows for an increased sensor range without compromising longitudinal resolution.
Our group has focused on the development of fast and robust algorithms
for modeling and evaluation of new resistivity logging tools (multiarray and triaxial induction devices) performance.
keywords—welllogging, stratified media, resistivity logging, loggingwhiledrilling (LWD), borehole radar, borehole sensor, induction tool.

G. S. Rosa, J. R. Bergmann, and F. L. Teixeira, `
A perturbation method to model electromagnetic
welllogging tools in curved boreholes,’
IEEE Trans. Geosci. Remote Sens., vol. 56, no. 4, pp. 19791993, 2018.
 G. Xing and F. L. Teixeira,
`
An efficient rescaled formulation for tensor
Green’s function computation in cylindrical
multilayered media,' IEEE Trans. Antennas Propagat., vol. 63, no. 12, pp. 56775685, 2015.
 H. Moon, F. L. Teixeira, and B. Donderici,
`
Computation of potentials from current electrodes in cylindrically stratified media: A stable, rescaled semianalytical formulation,’
J. Comp. Phys., vol. 280, pp. 692709, 2015.
 K. Sainath and F. L. Teixeira, `
Spectraldomainbased scattering analysis of fields radiated by distributed sources
in planarstratified environments with arbitrarily anisotropic layers,’ Phys. Rev. E, vol. 90, 063302, 2014.
 K. Sainath, F. L. Teixeira, and B. Donderici
`
Complexplane generalization of scalar Levin transforms: A robust,rapidly convergent method to compute potentials and fields in multilayered media,’
J. Comp. Phys., vol. 269, pp. 403422, 2014.
 H. Moon, F. L. Teixeira, and B. Donderici
`
Stable pseudoanalytical computation of electromagnetic fields from arbitrarilyoriented dipoles in cylindrically stratified media,’
J. Comp. Phys., vol. 273, pp. 118142, 2014.
 K. Sainath, F. L. Teixeira, and B. Donderici, `Robust computation of dipole electromagnetic fields in arbitrarilyanisotropic,
planarstratified environments,’ Phys. Rev. E, vol. 89, 013312, 2014.
 G.S. Liu, F. L. Teixeira, and G.J. Zhang,
`Analysis of directional logging tools in anisotropic
and multieccentric cylindricallylayered
Earth formations,' IEEE Trans. Antennas Propagat., vol. 60, no. 1, pp. 318327, 2012.
 H. O. Lee, F. L. Teixeira, L. E. San Martin, and M. S. Bittar, `Numerical modeling of eccentered LWD
borehole sensors in dipping and fully
anisotropic Earth formations,'
IEEE Trans. Geosci. Remote Sens., vol. 50, no. 3, pp. 727735, 2012.
 M. S. Novo, L. C. da Silva, and F. L. Teixeira,
`A comparative analysis of Krylov solvers for threedimensional simulations of borehole sensors,'
IEEE Geosci. Remote Sens. Lett., vol. 8, no. 1, pp. 98102, 2011.
 M. S. Novo, L. C. Silva, and F. L. Teixeira,
`Threedimensional finitevolume analysis of directional resistivity logging sensors,'
IEEE Trans. Geosci. Remote Sens., vol. 48, no. 3, pp. 11511158, 2010.
 Y.K. Hue and F. L. Teixeira,
`Numerical modematching method for tilted coil antennas in cylindrically layered anisotropic media with multiple horizontal beds,'
IEEE Trans. Geosci. Remote Sens., vol. 45, no. 8, pp. 24512462, 2007.
 H. O. Lee and F. L. Teixeira,
`Cylindrical FDTD analysis of LWD tools through anisotropic dippinglayered earth media,'
IEEE Trans. Geosci. Remote Sens., vol. 45, no. 2, pp. 383388, 2007.
 Y.K. Hue and F. L. Teixeira,
`Analysis of tiltedcoil eccentric borehole antennas in cylindrical multilayered formations for welllogging applications,'
IEEE Trans. Antennas Propagat., vol. 54, no. 4, pp. 10581064, 2006.
 Y.K. Hue, F. L. Teixeira, L. San Martin, and M. Bittar,
`Threedimensional simulation of eccentric LWD tool response in boreholes through dipping formations,'
IEEE Trans. Geosci. Remote Sens., vol. 43, no. 2, pp. 257268, 2005.
 F. L. Teixeira and W. C. Chew,
`Finite difference computation of transient electromagnetics waves for cylindrical
geometries in complex media,' (invited paper)
IEEE Trans. Geosci. Remote Sens., vol. 38, no. 4, pp. 15301543, 2000.
 Electromagnetic metamaterials
``Metamaterials'' is an umbrella term for a broad class of engineered materials that exhibit electromagnetic properties
not found in natural bulk materials. Our efforts in this area have focused on
dispersionengineered materials, isoimpedance materials, and plasmonics.
For example, we have demonstrated the first plasmon nanochain
operating at the optical communication band (1550 nm) [Kyung et al., 2007] and the first blueprint of a
reflectionless curved waveguide [Donderici and Teixeira, 2008]. We also did formative work on
perfectly matched layers and on what became later known as ``transformation optics'' [Teixeira and Chew, 1998, 1999, 2000].
keywords—isoimpedance material, transformation optics (TO), reflectionless absorber, plasmon waveguide, degenerate bandedge (DBE),
magnetic photonic crystal (MPC) (MPhC).
 H. Odabasi, K. Sainath, and F. L. Teixeira,
`Launching and controlling Gaussian beams from point sources via planar transformation media,'
Phys. Rev. B, vol. 97, 075105, 2018.
 A. F. Mota, A. Martins, J. Weiner, F. L. Teixeira, and B.H. V. Borges,
`Constitutive parameter retrieval for uniaxial metamaterials with spatial dispersion,'
Phys. Rev. B, vol. 94, 115410, 2016.
 K. Sainath and F. L. Teixeira,
`Perfectly reflectionless omnidirectional absorbers
and electromagnetic horizons,'
J. Opt. Soc. Am. B, vol. 32, no. 8, pp. 16451650, 2015.
 H. Odabasi and F. L. Teixeira,
`Electricfield coupled resonators as metamaterial loadings for waveguide miniaturization,’
J. Appl. Phys., vol. 114, 214901, 2013.
 H. Odabasi, F. L. Teixeira, and D. O. Guney,
`Electrically small, complementary electricfieldcoupled resonator antennas,’ J. Appl. Phys.,
vol. 113, 084903, 2013.
 H. Odabasi, F. L. Teixeira, and W. C. Chew,
`Impedancematched absorbers and optical pseudo black holes,'
J. Opt. Soc. Am. B, vol. 28, no. 5, pp. 13171323, 2011.
 K.Y. Jung, F. L. Teixeira, and R. M. Reano,
`Surface plasmon coplanar waveguides: Mode characteristics and mode conversion losses,'
IEEE Photonics Technol. Lett., vol. 21, no. 10, pp. 630632, 2009.
 K.Y. Jung and F. L. Teixeira,
`Photonic crystals with a degenerate band edge: Field enhancement effects and sensitivity analysis,'
Phys. Rev. B, vol. 77, no. 12, 125108, 2008.
 B. Donderici and F. L. Teixeira,
`Metamaterial blueprint for reflectionless waveguide bends,'
IEEE Microwave Wireless Components Lett., vol. 18, no. 4, pp. 233235, 2008.
 K.Y. Jung and F. L. Teixeira,
`Numerical study of photonic crystals with a split band edge: Polarization dependence and sensitivity analysis,'
Phys. Rev. A, vol. 78, no. 4, 043826, 2008.
 F. L. Teixeira,
`Closedform metamaterial blueprints for electromagnetic masking of arbitrarily shaped convex PEC objects,'
IEEE Antennas Wireless Propagat. Lett., vol. 6, pp. 163164, 2007.
 K.Y. Jung, F. L. Teixeira, and R. Reano,
`Au/SiO_{2} nanoring plasmon waveguides at optical communication band,'
J. Lightwave Technol., vol. 25, no. 9, pp. 27572765, 2007.
 K.Y. Jung, B. Donderici, and F. L. Teixeira,
`Transient analysis of spectrally asymmetric magnetic photonic crystals with ferromagnetic losses,'
Phys. Rev. B, vol. 74, no. 16, 165207, 2006.
 L. S. D. Alcantara, M. A. C. Lima, , A. C. Cesar, B.H. V. Borges, and F. L. Teixeira,
`Design of a multifunctional integrated optical isolatorswitch based on nonlinear and nonreciprocal effects,'
Opt. Eng., vol. 44, no. 12, pp. 124002.19, 2005.
 F. L. Teixeira,
`On aspects of the physical realizability of perfectly matched absorbers for electromagnetic waves,' (invited paper)
Radio Sci., vol. 38, no. 2, 8014, 2003.

F. L. Teixeira and W. C. Chew,
`Complex space approach to perfectly matched layers: A review and some new developments,' (invited paper)
Int. J. Num. Model., vol. 13, pp. 441455, 2000.

F. L. Teixeira and W. C. Chew,
`Differential forms, metrics, and the reflectionless absorption of electromagnetic waves,'
J. Electromagn. Waves Applicat., vol. 13, no. 5, pp. 665686, 1999.

F. L. Teixeira and W. C. Chew,
`General closedform PML constitutive tensors to match arbitrary bianisotropic and dispersive linear media,'
IEEE Microwave Guided Wave Lett., vol. 8, no. 6, pp. 223225, 1998.
 Computational electromagnetics
Computational electromagnetics (CEM)
seeks to develop faster and more efficient mumerical
algorithms for studying electromagnetic field interactions with natural and manmade structures. Our efforts in this area have focused
on developing efficient timedomain algorithms for disparatesize
problems, where large structures coexist with fine geometric details, and for
complex media with inhomogeneous, anisotropic, and dispersive properties.
keywords—finite element timedomain (FETD), finite difference timedomain (FDTD), differential forms, lattice field theory,
perfectly matched layer (PML), alternatingdirectionimplicit (ADI), locallyonedimensional (LOD), numerical dispersion, grid dispersion.
 D.Y. Na, H. Moon, Y. A. Omelchenko, and F. L. Teixeira,
`
Relativistic extension of a chargeconservative finite element solver for timedependent MaxwellVlasov equations
,'
Phys. Plasmas, vol. 25, pp. 013109, 2018.
 D.Y. Na, Y. A. Omelchenko, H. Moon, B.H. V. Borges, and F. L. Teixeira,
`
Axisymmetric chargeconservative electromagnetic particle simulation algorithm on unstructured grids: Application to microwave vacuum electronic devices
,'
J. Comp. Phys., vol. 346, pp. 295317, 2017.
 D.Y. Na, H. Moon, Y. A. Omelchenko, and F. L. Teixeira,
`
Local, explicit, and chargeconserving
electromagnetic particleincell algorithm
on unstructured grids,'
IEEE Trans. Plasma Sci., vol. 44, no. 8, pp. 13531362, 2016.
 H. Moon, F. L. Teixeira, and Y. A. Omelchenko, `
Exact chargeconserving scatter–gather algorithm for particleincell simulations on unstructured grids: A geometric perspective,' Comp. Phys. Comm., vol. 194, pp. 4353, 2015.
 F. L. Teixeira, `Lattice Maxwell's equations,' (invited paper) PIER, vol. 148, pp. 113128, 2014.
 H. Moon, F. L. Teixeira, J. Kim, and Y. A. Omelchenko, `Tradeoffs for unconditional stability in the
finiteelement timedomain method,' IEEE Microw. Wireless Comp. Lett., vol. 24, no. 6, pp. pp.361363, 2014.
 L. D. Angulo, J. Alvarez, F. L. Teixeira, M. F. Pantoja, and S. G. Garcia,
`Causalpath local timestepping in the discontinuous Galerkin method for Maxwell's equations,’
J. Comp. Phys., vol. 256, pp. 678695, 2014.
 M. S. Gilbert and F. L. Teixeira, `
A smallperturbation automaticdifferentiation method for determining uncertainty in computational electromagnetics,’
IEEE Trans. Antennas Propagat., vol. 60, no. 11, pp. 53055314, 2012.
 J. Kim and F. L. Teixeira, `Parallel and explicit finiteelement timedomain method for Maxwell's
equations,' IEEE Trans. Antennas Propagat., vol. 59, no. 6, pp. 23502356, 2011.
 V. E. do Nascimento, K.Y. Jung, B.H. V. Borges, and F. L. Teixeira,
`A study on unconditionaly stable FDTD methods for the modeling of metamaterials,'
J. Ligthwave Technol., vol. 27, no. 19, pp. 42414249, 2009.

B. Donderici and F. L. Teixeira,
`Mixed finiteelement timedomain method for transient Maxwell equations in doubly dispersive media,'
IEEE Trans. Microwave Theory Tech., vol. 56, no. 1, pp. 113120, 2008.
 B. Donderici and F. L. Teixeira,
`Conformal perfectly matched layer for the mixed finiteelement timedomain method,'
IEEE Trans. Antennas Propagat., vol. 56, no. 4, pp. 10171026, 2008.
 F. L. Teixeira,
`Timedomain finitedifference and finiteelement methods for Maxwell equations in complex media,' (invited paper)
IEEE Trans. Antennas Propagat., vol. 56, no. 8, pp. 21502166, 2008.
 B. He and F. L. Teixeira,
`Differential forms, Galerkin duality, and sparse inverse approximations in finite element solutions of Maxwell equations,'
IEEE Trans. Antennas Propagat., vol. 55, no. 5, pp. 13591368, 2007.
 B. He and F. L. Teixeira,
`Geometric finite element discretization of Maxwell equations in primal and dual spaces,'
Phys. Lett. A, vol. 349, no. 14, pp. 114, 2006.
 S. Wang, F. L. Teixeira, and J. Chen,
`An iterative ADIFDTD with reduced splitting error,'
IEEE Microwave Wireless Components Lett., vol. 15, no. 2, pp. 9294, 2005.
 S. Wang and F. L. Teixeira,
`Some remarks on the stability of timedomain electromagnetic simulations,'
IEEE Trans. Antennas Propagat., vol. 52, no. 3, pp. 895898, 2004.
 S. Wang and F. L. Teixeira,
`Dispersionrelationpreserving FDTD schemes of largescale threedimensional problems,'
IEEE Transactions on Antennas and Propagation, vol. 51, no. 8, pp. 18181828, 2003.

Y. Srisukh, J. Nehrbass, F. L. Teixeira, J.F. Lee, and R. Lee,
`An approach for automatic grid generation in 3D FDTD simulations of complex geometries,'
IEEE Antennas Propagat. Mag., vol. 44, no. 4, pp. 7580, 2002.

F. L. Teixeira and W. C. Chew,
`Lattice electromagnetic theory from a topological viewpoint,'
J. Math. Phys., vol. 40, no. 1, pp. 169187, 1999.

F. L. Teixeira and W. C. Chew,
'Analytical derivation of a conformal perfectly matched absorber for electromagnetic waves,'
Microwave Opt. Technol. Lett., vol. 17, no. 4, pp. 231236, 1998.

F. L. Teixeira and W. C. Chew,
`On causality and dynamic stability of perfectly matched layers for FDTD
simulations,'
IEEE Trans. Microwave Theory Tech., vol. 47, no. 6, pp. 775785, 1999.

F. L. Teixeira and W. C. Chew,
'Systematic derivation of anisotropic PML absorbing media in cylindrical and spherical coordinates,'
IEEE Microwave Guided Wave Lett., vol. 7, no. 11, pp. 371373, 1997.

F. L. Teixeira and W. C. Chew,
'PMLFDTD in cylindrical and spherical grids,'
IEEE Microwave Guided Wave Lett., vol. 7, no. 9, pp. 285287, 1997.
Acknowledgment: Support from the following organizations is gratefully acknowledged:
The content of the information in this material does not necessarily reflect the position or the policy of the federal government,
and no official endorsement should be inferred. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s)
and do not necessarily reflect the views of any government agency or foundation.
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