Journal Publications

P. S. Paneru, J. J. Simpson, and M. B. Moldwin, “Grid Resolution Requirements for FDTD Modeling of Geoelectric Fields,” Journal of Geophysical Research - Space Weather , vol. 129, no. 6, e2023JA032125, 2024.
Y. Zhang, D. R. Smith, and J. J. Simpson, “A 3-D global FDTD Courant-limit model of the Earth for long-time-span and high-altitude applications,” Applied Computational Electromagnetics Society Journal, vol. 39, no. 2, 2024.
Y. Zhang and J. J. Simpson, “Extrapolation within the time-stepping loop of FDTD models,” IEEE Transactions on Antennas and Propagation, vol. 72, no. 4, pp. 3553 - 3557, 2024.
Jensen, Y. Rahmani, and J. J. Simpson, “The hunt for perpendicular magnetic field measurements in plasma,” The Astrophysics Journal, vol. 963, no. 1, 2024.
F. L. Teixeira, C. Sarris, Y. Zhang, D.-Y. Na, J.-P. Berenger, Y. Su, M. Okoniewski, W. C. Chew, V. Backman, and J. J. Simpson, “ Finite-difference time-domain methods, ” Nature Reviews Methods Primers, 3:75, 2023.
K. Niknam and J. J. Simpson, “ A TF/SF plane wave source condition for the constraint preserving FVTD Method” IEEE Jounral on Multiscale and Multiphysics Computational Techniques, vol. 8, pp. 108-122, 2023.
D. Smith, C. Jin, J. J. Simpson, E. Decrossas, “FDTD Modeling of Internal Electrostatic Discharge EVents Coupled to high frequency antennas,” IEEE Transactions on Electromagnetic Compatibitiliy, vol. 64, no. 1, pp. 39-46, 2022, Paper47.pdf
K. Niknam and J. J. Simpson, “A review of grid-based, time-domain modeling of electromagnetic wave propagation in the ionosphere,” IEEE Journal on Multiscale and Multiphysics Computational Techniques, vol. 6, pp. 214-228, 2021, Paper46.pdf
D. S. Balsara, S. Samantaray, K. Niknam, J. J. Simpson, and G. Montecinos, “An optimized CPML formulations for high order FVTD schemes for CED,” IEEE Journal on Multiscale and Multiphysics Computational Techniques, vol. 6, pp. 183-200, 2021, Paper45.pdf
S. Burns, F. Gasdia, J. J. Simpson, R. A. Marshall, “3-D FDTD modeling of long-distance VLF propagation in the Earth-ionosphere waveguide,” IEEE Transactions on Antennas and Propagation, vol. 69, no. 11, pp. 7743-7752, 2021, Paper44.pdf
D. R. Smith and J. J. Simpson, “On the possibility of using ULF/ELF electromagnetic waves from undersea cables to detect airplanes submerged in the ocean,” ACES Journalvol. 36, no. 5, pp. 486-495, 2021. Paper43.pdf
D. R. Smith, T. Tan, E. Dao, C. Huang, and J. J. Simpson, “An FDTD investigation of orthogonality and the backscattering of HF waves in the presence of ionospheric irregularities,” Journal of Geophysical Research -- Space Physics vol. 125, e2020JA028201, 2020. Paper42.pdf
D. Balsara and J. J. Simpson, “Making a synthesis of FDTD and DGTD schemes for computational electromagnetics,” IEEE Journal on Multiscale and Multiphysics Computational Techniques vol. 5, pp. 99-118, 2020. Paper41.pdf
X. Xu, L. Chen, C. Zhou, X. Liu, Z. Xia, J. J. Simpson, and Y. Zhang, “Two dimensional full-wave simulation of whistler-mode wave propagation near the local lower hybrid resonance frequency in a dipole field,” Journal of Geophysical Research - Space Physics vol. 125, no. 4, e2019JA027750, 2020. Paper40.pdf
D. R. Smith, Cy. Y Huang, J. J. Simpson, and E. Dao, “FDTD modeling of HF waves through ionsopheric plasma irregularities,” Journal of Geophysical Research - Space Physics vol. 125, no. 3, e2019JA02499, 2020. Paper39.pdf
X. Xu, C. Zhou, L. Chen, Z. Xia, X. Liu, J. J. Simpson, Y. Zhang, “Two dimensional full-wave modeling of propagation of low-altitude hiss in the ionosphere ” Geophysical Research Letters, vol. 47, no. 4, e2019GL086601, 2020. Paper38.pdf
S. Pokhrel, G. Moss, and J. J. Simpson, “FDTD modeling of coils for wireless charging applications,” Applied Computational Electromagnetics Society Journal vol. 34, no. 11, pp. 1620 - 1628, 2019. Paper37.pdf
D. R. Smith, S. Burns, J. J. Simpson, S. Ferrone, “FDTD modeling of scattered ultra low-frequency elecromagnetic waves from objects submerged in the ocean,” IEEE Transactions on Antennas and Propagation vol. 67, no. 4, pp. 2534 - 2541, 2019. Paper36.pdf
B. T. Nguyen, A. Samimi, S. Wiechecki Vergara, C. D. Sarris, and J. J. Simpson, “Analysis of electromagnetic wave propagation in variable magnetized plasma via polynomial chaos expansion ,” IEEE Transactions on Antennas and Propagation, vol. 67, no. 1, pp. 438 - 449, 2019.Paper35.pdf
B. T. Nguyen, S. Wiechecki Vergara, C. D. Sarris, and J. J. Simpson, “Ionospheric variability effects on impulsive ELF antipodal propagation about the Earth-sphere,” IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 6244-6254, 2018. Paper34.pdf
S. Pokhrel, V. Shankar, and J. J. Simpson, “3-D FDTD modeling of electromagnetic wave propagation in magnetized plasma requiring singular updates to the current density equation,” IEEE Transactions on Antennas and Propagation,vol. 66, no. 9, pp. 4772-4781, 2018. Paper33.pdf
S. Pokhrel, M. Rodriguez, A. Samimi, G. Heber, and J. J. Simpson, “Parallel I/O for 3-D global FDTD Earth-Ionosphere waveguide models at resolutions on the order of ~1 km and higher using HDF5,” IEEE Transactions on Antennas and Propagation, vol. 7, no. 66, pp. 3548-3555, 2018. Paper32.pdf
S. Pokhrel, B. Nguyen, M. Rodriguez, E. Bernabeu, and J. J. Simpson, “A finite difference time domain investigation of electric field enhancements along ocean-continent boundaries during space weather events,” Journal of Geophysical Research -- Space Physics vol. 123, no. 6, DOI:10.1029/2017JA024648, 2018. Paper31.pdf
A. Pulkkinen, E. Bernabeu, A. Thomson, A. Viljanen, R. Pirjola, D. Boteler, J. Eichner, P. J. Cilliers, D. Welling, N. P. Savani, R. S. Weigel, J. J. Love, C. Balch, C. M. Ngwira, G. Crowley, A. Schultz, R. Kataoka, B. Anderson, J. J. Simpson, and M. MacAlester, “Geomagnetically induced currents: Science, engineering, and application readiness,” Space Weather,DOI 10.1002/2016SW001501, 2017. Paper30.pdf
A. Samimi and J. J. Simpson, “Parallelization of 3-D FDTD Earth-ionosphere waveguide models at resolutions on the order of ~1 km and higher,” Antennas and Wireless Propagation Letters, vol. 15, pp. 1959-1962, 2016. Paper29.pdf
B.T. Nguyen, C. Furse, and J. J. Simpson, “A 3-D stochastic FDTD model of electromagnetic wave propagation in magnetized ionospheric plasma,” IEEE Transactions on Antennas and Propagation, vol. 63, no. 1, pp. 304 - 313, 2015. Paper28.pdf
A. Samimi and J. J. Simpson, “An efficient 3-D FDTD model of electromagnetic wave propagation in magnetized plasma,” IEEE Transactions on Antennas and Propagation, vol. 63, no. 1, pp. 269 - 279, 2015. Paper27.pdf
B.T. Nguyen, A. Samimi, and J. J. Simpson, “Recent Advances in FDTD modeling of electromagnetic wave propagation in the ionosphere,” Applied Computational Electromagnetics Society Journal, vol. 29, no. 12, pp. 1003-1012, 2014 (invited). Paper26.pdf
M. Hasan and J. J. Simpson, “Three-dimensional subwavelength confinement of a photonic nanojet using a plasmonic nanoantenna gap,” Microwave and Optical Technology Letters, vol. 56, no. 11, pp. 2700-2706, 2014. Paper25.pdf
M. Hasan and J. J. Simpson, “Photonic nanojet enhanced nanometer-scale germanium photodiode,” Applied Optics vol. 52, no. 22, pp. 5420-5425, Aug. 2013. Paper24.pdf
Y. Yu, J. Niu, and J. J. Simpson, “A 3-D global Earth-ionosphere FDTD model including an anisotropic magnetized plasma ionosphere,” IEEE Transactions on Antennas and Propagation, vol. 60, no. 7, pp. 3246-3256, 2012, doi: 10.1109/TAP.2012.2196937. Paper23.pdf
J. Niu and J. J. Simpson, “On the air-sea boundary in marine CSEM detection modeling of sub-seafloor hydrocarbon reservoirs,” Antennas and Wireless Propagation Letters, vol. 11, pp. 651-654, 2012, doi: 10.1109/LAWP.2012.2203329. Paper22.pdf
C. Mendez-Ruiz and J. J. Simpson, “Cepstral analysis of photonic nanojet-illuminated biological cells,” Applied Computational Electromagnetics Society Journal, vol. 27, no. 3, pp. 215-222, 2012. Paper21.pdf
J. J. Simpson, “On the possibility of high-level transient coronal mass ejection - induced ionospheric current coupling to electric power grids,” Journal of Geophysical Research -- Space Physics, 116, A11308, 2011, doi:10.1029/2011JA016830. Paper20.pdf
C. Mendez-Ruiz and J. J. Simpson, “Ultra high-resolution FDTD modeling of a high-performance VLSI package for identifying resonances and couplings,” Applied Computational Electromagnetics Society Journal vol. 26, no. 4, pp. 284-294, 2011. Paper19.pdf
Y. Yu and J. J. Simpson, “A magnetic field-independent absorbing boundary condition for magnetized cold plasma,” IEEE Antennas and Wireless Propagation Letters vol. 10, pp. 294-297, 2011, doi: 10.1109/LAWP.2011.2139191. Paper18.pdf
M. Madrid, J. J. Simpson, and M. Hayat, “FDTD calculations of the diffraction coefficient of vibrating wedges,” IEEE Antennas and Wireless Propagation Letters vol. 10, pp. 163-166, 2011, doi: 10.1109/LAWP.2011.2121890. Paper17.pdf
C. Mendez-Ruiz and J. J. Simpson, “Detection of embedded ultra-subwavelength-thin dielectric features using elongated photonic nanojets,” Optics Express, vol. 18, iss. 16, pp. 16805-16812, 2010, doi: 10.1364/OE.18.016805. [Also published in the Virtual Journal for Biomedical Optics, vol. 5, iss. 16, pp. 16805-16812, 2010.] Paper16.pdf
Y. Yu and J. J. Simpson, “An E-J collocated 3-D FDTD model of electromagnetic wave propagation in magnetized cold plasma,” IEEE Transactions on Antennas and Propagation, vol. 58, no. 2, pp. 469-478, 2010, doi: 10.1109/TAP.2009.2037706. Paper15.pdf
J. J. Simpson, “Current and future applications of 3-D global Earth-ionosphere models based on the full-vector Maxwell’s equations FDTD method,” Surveys in Geophysics, vol. 30, no. 2, pp. 105-130, 2009, doi: 10.1007/s10712-009-9063-5 (invited). Paper14.pdf
J. J. Simpson, “Global FDTD Maxwell’s equations modeling of electromagnetic propagation from currents in the lithosphere,” IEEE Transactions on Antennas and Propagation, vol. 56, no. 1, pp. 199-203, 2008, doi: 10.1109/TAP.2007.913149. Paper13.pdf
S.-C. Kong, J. J. Simpson, and V. Backman, “ADE-FDTD scattered field formulation for dispersive materials,” IEEE Microwave and Wireless Components Letters, vol. 18, no. 1, pp. 4-6, 2008, doi: 10.1109/LMWC.2007.911970. Paper12.pdf
A. Heifetz, J. J. Simpson, S.-C. Kong, A. Taflove, and V. Backman, “Subdiffraction optical resolution of a gold nanosphere located within the nanojet of Mie-resonant dielectric microsphere,” Optics Express, vol. 15, no. 25, pp. 17334-17342, 2007, doi: 10.1364/OE.15.017334. [Also published in the Virtual Journal for Biomedical Optics, vol. 3, iss. 1, pp. 17334-17342, 2008.] Paper11.pdf
J. J. Simpson and A. Taflove, “A review of progress in FDTD Maxwell’s equations modeling of impulsive sub-ionospheric propagation below 300 kHz,” IEEE Transactions on Antennas and Propagation in the Special Issue on Electromagnetic Wave Propagation in Complex Environments: A Tribute to Leopold Benno Felsen, vol. 55, no. 6, pp. 1582-1590, June 2007, doi: 10.1109/TAP.2007.897138. Paper10.pdf
J. J. Simpson and A. Taflove, “ELF radar system proposed for localized D-region ionospheric anomalies,” IEEE Geoscience and Remote Sensing Letters, vol. 3, no. 4, pp. 500-503, Oct. 2006, doi: 10.1109/LGRS.2006.878443. Paper9.pdf
J. J. Simpson, R. P. Heikes, and A. Taflove, “FDTD modeling of a novel ELF radar for major oil deposits using a three-dimensional geodesic grid of the Earth-ionosphere waveguide,” IEEE Transactions on Antennas and Propagation, vol. 54, no. 6, pp. 1734-1741, June 2006, doi: 10.1109/TAP.2006.875504. Paper8.pdf
J. J. Simpson, A. Taflove, J. A. Mix, and H. Heck, “Substrate integrated waveguides optimized for ultrahigh-speed digital interconnects,” IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 5, pp. 1983-1990, May 2006, doi: 10.1109/TMTT.2006.873622. Paper7.pdf
J. J. Simpson and A. Taflove, “A novel ELF radar for major oil deposits,” IEEE Geoscience and Remote Sensing Letters, vol. 3, no. 1, pp. 36-39, 2006, doi: 10.1109/LGRS.2005.856118. Paper6.pdf
J. J. Simpson and A. Taflove, “Electrokinetic effect of the Loma Prieta earthquake calculated by an entire-Earth FDTD solution of Maxwell’s equations,” Geophysical Research Letters, vol. 32, L09302, doi:10.1029/2005GL022601, 2005, doi: 10.1029/2005GL022601. Paper5.pdf
J. J. Simpson and A. Taflove, “Efficient modeling of impulsive ELF antipodal propagation about the Earth sphere using an optimized two-dimensional geodesic FDTD grid,” IEEE Antennas and Wireless Propagation Letters, vol. 3, no. 11, pp. 215-218, 2004, doi: 10.1109/LAWP.2004.834936. Paper4.pdf
J. J. Simpson, A. Taflove, J. A. Mix, and H. Heck, “Computational and experimental study of a microwave electromagnetic bandgap structure with waveguiding defect for potential use as a bandpass wireless interconnect,” IEEE Microwave and Wireless Components Letters, vol. 14, no. 7, pp. 343-345, July 2004, doi: 10.1109/LMWC.2004.829283. Paper3.pdf
J. J. Simpson and A. Taflove, “Three-dimensional FDTD modeling of impulsive ELF antipodal propagation and Schumann resonance of the Earth-sphere,” IEEE Transactions on Antennas and Propagation, vol. 52, no. 2, pp. 443–451, Feb. 2004, doi: 10.1109/TAP.2004.823953. Paper2.pdf
J. J. Simpson and A. Taflove, “Two-dimensional FDTD model of antipodal ELF propagation and Schumann resonance of the Earth,” IEEE Antennas and Wireless Propagation Letters, vol. 1, no. 2, pp. 53-56, 2002, doi: 10.1109/LAWP/2002/805123. Paper1.pdf