Home

Group

Research

Publications

Short CV

REFEREED JOURNAL PUBLICATIONS


2012

  1. Popa, B.-I. and S. A. Cummer, Nonreciprocal active metamaterials, Phys. Rev. B., v. 85, 205101, 2012. [pdf reprint]

  2. Lu, G., S. A. Cummer, R. J. Blakeslee, and E. McCaul, Lightning morphology and impulse charge moment changes of high peak current negative strokes, J. Geophys. Res., v. 117, D04212, 2012 [pdf reprint]

  3. Li, J. and S. A. Cummer (2012), Relationship between sprite streamer behavior and lightning-driven electric fields, J. Geophys. Res., v. 117, A01317. [pdf reprint]


    2011

  4. Smith, D. M., J. Dwyer, B. Hazelton, B. Greffenstette, G. F. M. Martinez-McKinney, Z. Y. Zhang, A. W. Lowell, N. A. Kelley, M. E. Splitt, S. M Lazarus, W. Ulrich, M. Schaal, Z. H. Saleh, E. Cramer, H. Rassoul, S. A. Cummer, G. Lu, X.-M. Shao, C. Ho, T. Hamlin, R. Blakeslee, and S. Heckman, A terrestrial gamma ray flash observed from an aircraft, J. Geophys. Res., v. 116, D20124, 2011. [pdf reprint]

  5. Neubert, T., O. Chanrion, E. Arnone, F. Zanotti, S. Cummer, J. Li, M. Fuellekrug, C. Haldoupis, and O. van der Velde, The properties of a gigantic jet reflected in a simultaneous sprite: Observations interpreted by a model (2011), J. Geophys. Res., v. 116, A12329. [pdf reprint]

  6. Zhai, Y., S. A. Cummer, J. L. Green, B. W. Reinisch, M. L, Kaiser, M. J. Reiner, and K. Goetz (2011), Magnetospheric radio tomographic imaging with IMAGE and WIND, J. Geophys. Res., v. 116, A12208[pdf reprint]

  7. Popa, B.-I. and S. A. Cummer, Complex coordinates in transformation optics (2011), Phys. Rev. A, v. 84, 063837. [pdf reprint]

  8. Lang, T. J., Jingbo Li, W. A. Lyons, S. A. Cummer, S. A. Rutledge, and D. R. MacGorman (2011), Transient luminous events above two mesoscale convective systems: Charge moment change analysis, J. Geophys. Res., v. 116, A10306.[pdf reprint]

  9. Smith, D. M., J. Dwyer, B. Hazelton, B. Greffenstette, G. F. M. Martinez-McKinney, Z. Zhang, A. Lowell, N. Kelley, M. Splitt, S. Lazarus, W. Ulrich, M. Schaal, Z. Saleh, E. Cramer, H. Rassoul, S. A. Cummer, G. Lu, and R. Blakeslee (2011), The rarity of terrestrial gamma-ray flashes, Geophys. Res. Lett., v. 38, L08807. [pdf reprint]

  10. Cummer, S. A., G. Lu, M. S. Briggs, V. Connaughton, S. Xiong, G. J. Fishman, and J. R. Dwyer (2011), The lightning-TGF relationship on microsecond timescales, Geophys. Res. Lett., v. 38, L14810. [pdf reprint]

  11. Zigoneanu, L., B.-I. Popa, and S. A. Cummer (2011), Design and measurements of a broadband 2D acoustic lens, Phys. Rev. B., v84, 024305. [pdf reprint]

  12. Lu, G., S. A. Cummer, W. A. Lyons, P. R. Krehbiel, J. Li, W. Rison, R. J. Thomas, H. Edens, W. Beasley, M. A. Stanley, D. R. MacGorman, O. A. van der Velde, M. B. Cohen, T. J. Lang, and S. A. Rutledge (2011), Lightning development associated with two negative gigantic jets, Geophys. Res. Lett., v. 38, L12801. [pdf reprint]

  13. Han, F. and S. A. Cummer (2011), Daytime ionospheric D region sharpness derived from VLF radio atmospherics, J. Geophys. Res., v. 116, A05314. [pdf reprint]

  14. Popa, B.-I., L. Zigoneanu, and S. A. Cummer (2011), Experimental acoustic ground cloak in air, Phys. Rev. Lett., v. 106, 253901. [pdf reprint]

  15. Popa, B.-I. and S. A. Cummer (2011), Homogeneous and compact acoustic ground cloaks, Phys. Rev. B, v. 83, 224304. [pdf reprint]

  16. Lu, G., S. A. Cummer, J. Li, F. Han, D. M. Smith, and B. Grefenstette (2011), Characteristics of broadband magnetic lightning emissions associated with terrestrial gamma-ray flashes, J. Geophys. Res., v. 116, A03316. [pdf reprint]

  17. Zigoneanu, L., B.-I. Popa, A. Starr, and S. A. Cummer (2011), Design and measurements of a broadband 2D acoustic metamaterial with anisotropic effective mass density, J. Appl. Phys., v. 109, 054906. [pdf reprint]

  18. Thompson, R. T., S. A. Cummer, and J. Frauendiener (2011), Generalized transformation optics of linear materials, J. Optics, v. 13, 055105. [pdf reprint]

  19. Gamerota, W., J. Li, S. A. Cummer, H. Stenbaek-Nielsen, R. Haaland, and M. G. McHarg (2011), Comparison of sprite initiation altitudes between observations and models, J. Geophys. Res., v. 116, A02317. [pdf reprint]

  20. Li, J. and S. A. Cummer (2011), Estimation of electric charge in sprites from optical and radio observations, J. Geophys. Res., v. 116, A01301. [pdf reprint]

  21. Thompson, R. T., S. A. Cummer, and J. Frauendiener (2011), A completely covariant approach to transformation optics, Journal of Optics, v. 13, 024008. [pdf reprint]

  22. Cummer, S. A. and R. T. Thompson (2011), Frequency conversion by exploiting time in transformation optics, Journal of Optics, v. 13, 024007. [pdf reprint]


    2010

  23. van der Velde, O. A., J. Bor, J. Li, S. A. Cummer, E. Arnone, F. Zanotti, M. Fullekrug, C. Haldoupis. S. N. Amor, and T. Farge (2010), Multi-instrumental observations of a positive gigantic jet producted by a winter thunderstorm in Europe, J. Geophys. Res., v. 115, D24301, doi:10.1029/2010JD014442. [pdf reprint]

  24. Rodger, C. J., B. R. Carson, S. A. Cummer, R. J. Gamble, M. A. Clilverd, J.-A. Sauvaud, M. Parrot, and J. C. Green (2010), Contrasting the efficiency of radiation belt losses caused by ducted and non-ducted whistler mode waves from ground-based transmitters, J. Geophys. Res., 115, A12208, doi:10.1029/2010JA015880. [pdf reprint]

  25. Sao Sabbas, F., P. D. Pautet, M. J. Taylor, M. Bailey, V. T. Rampinelli, N. Solorzano, H. Thomas, S. Cummer, R. H. Holzworth, O. Pinto, and N. J. Schuch (2010), Observations of Prolific Transient Luminous Event Production Above a Mesoscale Convective System in Argentina during the Sprite2006 Campaign in Brazil, J. Geophys. Res., 115, A00E58, doi:10.1029/2009JA014857. [pdf reprint]

  26. Han, F. and S. A. Cummer (2010), Midlatitude daytime D region ionosphere variability measured from radio atmospherics, J. Geophys. Res., v. 115, A10314, doi:10.1029/2010JA015715. [pdf reprint]

  27. Gu, S., J. P. Barrett, T. H. Hand, and S. A. Cummer (2010), A broadband low-reflection metamaterial absorber, J. Appl. Phys., v. 108, 064913. [pdf reprint]

  28. Popa, B.-I. and S. A. Cummer (2010), Layered transformation optics devices of arbitrary shape, Phys. Rev. A, v. 82, 033837. [pdf reprint]

  29. Sajuyigbe, S., M. Ross, P. Geren, S. A. Cummer, M. H. Tanelian, and D. R. Smith, Wide angle impedance matching metamaterials for waveguide-fed phased array antennas (2010), IET Microwaves, Antennas & Propagation, v. 4, pp. 1063-1072. [pdf reprint]

  30. Han, F. and S. A. Cummer (2010), Midlatitude nighttime D region ionosphere variability on hourly to monthly timescales, J. Geophys. Res., v. 115, A09323. [pdf reprint]

  31. Cohen, M. B., U. S. Inan, R. K. Said, M. S. Briggs, G. Fishman, V. Connaughton, and S. A. Cummer, A lightning discharge producing a relativistic electron beam, Geophys. Res. Lett., v. 37, L18806. [pdf reprint]

  32. Chou, J.-K., C. L. Kuo, L. Y. Tsai, A. B. Chen, H. T. Su, R. R. Hsu, S. A. Cummer, J. Li, H. U. Frey, S. B. Mende, Y, Takahashi, and L. C. Lee (2010), Gigantic jets with negative and positive polarity streamers, J. Geophys. Res., v. 115, A00E45. [pdf reprint]

  33. Katko, A. R., S. Gu, J. P. Barrett, B.-I. Popa, G. Shvets, and S. A. Cummer (2010), Phase conjugation and negative refraction using nonlinear active metamaterials, Phys. Rev. Lett., v. 105, 123905. [pdf reprint]

  34. Hand, T. H. and S. A. Cummer, Reconfigurable Frequency Selective Surface Using Addressable Metamaterials (2010), IEEE AWPL, v. 9, p. 70Ð74. [pdf reprint]

  35. Inan, U. S., S. A. Cummer, and R. A. Marshall (2010), A survey of ELF/VLF research on lightning-ionosphere interactions and causative discharges, J. Geophys. Res, 115, A00E36, doi:10.1029/2009JA014775. [pdf reprint]

  36. Lu, G., R. J. Blakeslee, J. Li, D. M. Smith, X.-M. Shao, E. W. McCaul, D. E. Buechler, H. J. Christian, J, M. Hall, and S. A. Cummer (2010), Lightning mapping observation of a terrestrial gamma-ray flash, Geophys. Res. Lett., 37, L11806. [pdf reprint]

  37. Lang, T. J., W. A. Lyons, S. A. Rutledge, J. Meyer, D. R. MacGorman, and S. A. Cummer (2010), Transient luminous events in two mesoscale convective systems: Storm structure and evolution, J. Geophys. Res., v. 115, A00E22, doi:10.1029/2009JA014500. [pdf reprint]

  38. Williams, E., W. Lyons, Y. Hobara, V. Mushtak, N. Asencio, R. Boldi, J. Bor, S. Cummer, E. Greenberg, M. Hayakawa, R. Holzworth, V. Kotroni, J. Li, C. Morales, T. Nelson, C. Price, B. Russell, G. Satori, K. Shirahata, Y. Takahashi, and K. Yamashita (2010), Ground-Based Detection of Sprites and their Parent Lightning Flashes over Africa during the AMMA Campaign, Quarterly Journal of the Royal Meteorological Society, v. 136, p. 257Ð271. [pdf reprint]

  39. Thomas, J. T., N. Solorzano, S. A. Cummer, and R. H. Holzworth (2010), Polarity and energetics of inner core lightning in three intense North Atlantic hurricanes, J. Geophys. Res., v. 115, A00E15, doi:10.1029/2009JA014777. [pdf reprint]


    2009

  40. Popa, B.-I. and S. A. Cummer (2009), Design and characterization of broadband acoustic composite metamaterials, Physical Review B, v. 80, 174303. [pdf reprint]

  41. Adachi, T., S. A. Cummer, J. Li, Y. Takahashi, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, and H. U. Frey (2009), Estimating lightning current moment waveforms from satellite optical measurements, Geophys. Res. Lett., v. 36, L18808. [pdf reprint]

  42. Cummer, S. A., N. Kundtz, and B.-I. Popa (2009), General electromagnetic sources under coordinate transformations, Physical Review A, v. 80, 033820. [pdf reprint]

  43. Cummer, S. A., J. Li, F. Han, G. Lu, N. Jaugey, W. A. Lyons, and T. E. Nelson (2009), Quantification of the troposphere to ionosphere charge transfer in a gigantic jet, Nature Geoscience, v. 2, p. 617-620, doi:10.1038/ngeo607. [pdf reprint]

  44. Yuan, Y., B.-I. Popa, and S. A. Cummer (2009), Zero loss magnetic metamaterials using powered active unit cells, Optics Express, v. 17, p. 16135-16143.[pdf reprint]

  45. Farrell, W. M., J. J. Plaut, S. A. Cummer, D. A. Gurnett, G. Picardi, T. R. Watters, and A. Safaeinili (2009), Is the Martian water table hidden from radar view?, Geophys. Res. Lett., v. 36, L15206. [pdf reprint]

  46. Lu, G., S. A. Cummer, J. Li, F. Han, R. J. Blakeslee, and H. J. Christian (2009), Charge transfer and in-cloud structure of energetic positive cloud-to-ground lightning strokes, Geophys. Res. Lett., v. 36, L15805, doi:10.1029/2009GL038880. [pdf reprint]

  47. Popa, B.-I., J. Allen, and S. A. Cummer, Conformal array design with transformation electromagnetics, Applied Physics Letters, v. 94, 244102, 2009. [pdf reprint]

  48. Li, J. and S. A. Cummer, Measurements of sprite streamer acceleration and deceleration, Geophysical Research Letters, v. 36, L10812, doi:10.1029/2009GL037581, 2009. [pdf reprint]

  49. Allen, J., N. Kundtz, D. Roberts, S. A. Cummer, and D. R. Smith, Source transformations using superellipse equations, Applied Physics Letters, v. 94, 194101, 2009. [pdf reprint]

  50. Kuo, C.-L.., J. K. Chou, L. Y. Tsai, A. B. Chen, H. T. Su, R. R. Hsu, S. A. Cummer, H. U. Frey, S. B. Mende, Y. Takahashi, and L. C. Lee, Discharge processes, electric fields, and electron energy in ISUAL recorded gigantic jets, J. Geophys. Res., v. 114, A04314, doi:10.1029/2008JA013791, 2009. [pdf reprint]

  51. Hand, T. H., and S. A. Cummer, Controllable magnetic metamaterial using digitally addressable split ring resonators, IEEE AWPL, v. 8, doi: 10.1109/LAWP.2009.2012879, 2009. [pdf reprint]

  52. Zhai, Y., and S. A. Cummer, A fast tomographic reconstruction strategy for diffuse optical tomography, Optics Express, v. 17, 5298-5310, 2009. [pdf reprint]

  53. Cummer, S. A., R. Liu, and T.-J. Cui, A rigorous and practical approximate cloaking coordinate transformation, Journal of Applied Physics, v. 105, 056012, doi:10.1063/1.3080155, 2009. [pdf reprint]

  54. Popa, B.-I., and S. A. Cummer, Cloaking with optimized homogeneous anisotropic layers, Phys. Rev. A, v. 79, 023806, DOI: 10.1103/PhysRevA.79.023806, 2009. [pdf reprint]

  55. Hazelton, B. J., B. W. Grefenstette, D. M. Smith, J. R. Dwyer, X.-M. Shao, S. A. Cummer, T. Chronis, E. H. Lay, and R. H. Holzworth, The spectral dependence of terrestrial gamma-ray flashes on source distance, Geophys. Res. Lett., v. 36, L01108, doi: 10.1029/2008GL035906, 2009. [pdf reprint]


    2008

  56. Kundtz, N., D. Roberts, J. Allen, S. A. Cummer, and D. R. Smith, Optical source transformations, Optics Express, v. 16, p. 21215, 2008. [pdf reprint]

  57. Cummer, S. A., M. Rahm, and D. Schurig, Material parameters and vector scaling in transformation acoustics, New J. Phys., v. 10, 115025, 2008. [pdf reprint]

  58. Hand, T. H., J. Gollub, S. Sajuyigbe, D. R. Smith, and S. A. Cummer, Characterization of complementary electric field resonator surfaces, Appl. Phys. Lett., v. 93, 212504, DOI: 10.1063/1.3037215, 2008. [pdf reprint]

  59. Yuan, Y, C. Bingham, T. Tyler, S. Palit, T. Hand. W. J. Padilla, N. M. Jokerst, and S. A. Cummer, A dual-resonant terahertz metamaterial based on single-particle electric-field-coupled resonators, Appl. Phys. Lett., v. 93, 191110, 2008. [pdf reprint]

  60. Ross, M., S. A. Cummer, T. K. Nielsen, and Y. Zhang, Simultaneous Remote Electric and Magnetic Field Measurements of Lightning Continuing Currents, J. Geophys. Res., 113, D20125, doi:10.1029/2008JD010294, 2008. [pdf reprint]

  61. Li, J., S. A. Cummer, W. A. Lyons, and T. E. Nelson, Coordinated analysis of delayed sprites with high speed images and remote electromagnetic fields, Journal of Geophysical Research, v. 113, D20206, doi:10.1029/2008JD010008, 2008. [pdf reprint]

  62. Lyons, W. A., S. A. Cummer, M. A. Stanley, K. C. Wiens, and T. E. Nelson, Supercells and sprites, Bulletin of the American Meteorological Society, p. 1165-1174, doi: 10.1175/BAMS2439.1, 2008. [pdf reprint]

  63. Erentok, A., R. W. Ziolkowski, J. A. Nielsen, R. B. Greegor, C. G. Parazzoli, M. H. Tanelian, S. A. Cummer, B.-I. Popa, T. Hand, D. C. Vier, and S. Schultz, Lumped element-based ENG, MNG, and DNG metamaterials at UHF frequencies, J. Applied Phys., v. 104, 034901, 2008. [pdf reprint]

  64. Taylor, M. J., M. A. Bailey, P. D. Pautet, S. A. Cummer, N, Jaugey, J, N. Thomas, N. N. Solorzano, F. Sao Sabbas, R. Holzworth, O. Pinto, and N. Schuch, Simultaneous imaging and ELF/VLF measurements of a sprite-halo driven by a negative lightning discharge over Argentina, Geophys. Res. Lett., v. 35, L14812, doi:10.1029/2008GL033984, 2008. [pdf reprint]

  65. Yuan, Y, S. Palit, C. Bingham, T. Hand. W. J. Padilla, D. R. Smith, N. M. Jokerst, and S. A. Cummer, Dual-band planar electric metamaterial in the terahertz range, Optics Express, v. 16, 9746Ð9752, 2008. [pdf reprint]

  66. Popa, B.-I. and S. A. Cummer, Compact dielectric particles as a building block for low loss magnetic metamaterials, Physical Review Letters, v. 100, 207401, 2008. [pdf reprint]

  67. Farrell, W. M., S. M. Clifford, S. M. Milkovich, C. J. Jeuschen, J. J. Plaut, G. Picardi, D. A. Gurnett, T. R. Watters, A. Safaeinili, A. B. Ivanov, R. J. Phillips, E. R. Stofan, E. Heggy, S. A. Cummer, and J. Espley, MARSIS subsurface radar investigations of the South Polar Reentrant Chasma Australe, Journal of Geophysical Research, v. 113, E04002, doi:10.1029/2007JE002974, 2008. [pdf reprint]

  68. Hand, T. H. and S. A. Cummer, Frequency tunable electromagnetic metamaterial using ferroelectric loaded split rings, Journal of Applied Physics, v. 103, 066105, 2008. [pdf reprint]

  69. Rahm, M., D. Schurig, D. A. Roberts, S. A. Cummer, D. R. Smith, J. B. Pendry, Design of electromagnetic cloaks and concentrators using form-invariant coordinate transformations of Maxwell's equations, Photonics and Nanostructures, vol. 6, pp. 87-95, 2008. [pdf reprint]

  70. Rahm, M., S. A. Cummer, D. Schurig, J. B. Pendry, and D. R. Smith, Optical design of reflectionless complex media by finite embedded coordinate transformations, Physical Review Letters, v. 100, 063903, 2008. [pdf reprint]

  71. Liu, R., Q. Cheng, T. Hand, J. J. Mock, T. J. Cui, S. A. Cummer, and D. R. Smith Experimental Demonstration of Electromagnetic Tunneling Through an Epsilon Near Zero Metamaterial at Microwave Frequencies, Physical Review Letters, v. 100, 023903, 2008. [pdf reprint]

  72. Cummer, S. A., D. R. Smith, M. Rahm, J. Pendry, D. Schurig, and A. Starr, Scattering theory derivation of a 3D acoustic cloaking shell, Physical Review Letters, v. 100, 024301, 2008. [pdf reprint]

  73. Cummer, S. A., B.-I. Popa, and T. H. Hand, Q-based design equations for resonant metamaterials and experimental validation, IEEE Transactions on Antennas and Propagation., v. 56, p. 127, doi:10.1109/TAP.2007.912959, 2008. [pdf reprint]


    2007

  74. Kuo, C.-L., A. B. Chen, L. Y. Tsai, R. K. Chou, R.-R. Hsu, H.-T. Su, L. C. Lee, S. A. Cummer, H. U. Frey, S. B. Mende, Y. Takahashi, and H. Fukunishi, Modeling elves observed by FORMOSAT-2 satellite, J. Geophys. Res., v. 112, A11312, doi:10.1029/2007JA012407, 2007. [pdf reprint]

  75. Erentok, A., R. W. Ziolkowski, J. A. Nielsen, R. B. Greegor, C. G. Parazzoli, M. H. Tanelian, S. A. Cummer, B.-I. Popa, T. Hand, D. C. Vier, and S. Schultz, Low frequency lumped element-based negative index metamaterial, Appl. Phys. Lett., v. 91, 184104, doi: 10.1063/1.2803771, 2007. [pdf reprint]

  76. Gollub, J., T. Hand, S. Sajuyigbe, S. Mendonca, S. Cummer, and D. R. Smith, Characterizing the effects of disorder in metamaterial structures, Appl. Phys. Lett., v. 91, 162907, doi: 10.1063/1.2801391, 2007. [pdf reprint]

  77. van der Velde, O. A., W. A. Lyons, S. A. Cummer, T. E. Nelson, and J. Bunnell, Analysis of the first gigantic jet recorded over continental North America, J. Geophys. Res., v. 112, D20104, doi:10.1029/2007JD008575, 2007. [pdf reprint]

  78. Frey, H. U., S. B. Mende, S. A. Cummer, J. Li, T. Adachi, H. Fukunishi, Y. Takahashi, A. B. Chen, R.-R. Hsu, H.-T. Su, and Y.-S. Chang, Halos generated by negative cloud-to-ground lightning, Geophys. Res. Lett., v. 34, L18801, doi: 10.1029/2007GL030908, 2007. [pdf reprint]

  79. Hand, T. H. and S. A. Cummer, Characterization of Tunable Metamaterial Elements Using MEMS Switches, IEEE Antennas and Wireless Propagation Letters, v. 6, p. 401, 2007. [pdf reprint]

  80. B.-I. Popa and S. A. Cummer, An architecture for active metamaterial particles ane experimental validation at RF, Microwave and Optical Technology Letters, v. 49, p. 2574, 2007. [pdf reprint]

  81. Hu W., S. A. Cummer, and W. A. Lyons, Testing sprite initiation theory using lightning measurements and modeled EM fields, J. Geophys. Res., 112, D13115, doi:10.1029/2006JD007939, 2007. [pdf reprint]

  82. Cheng, Z., S. A. Cummer, R.-R. Hsu, and H. T. Su, Broadband VLF measurement of D region ionospheric perturbations caused by lightning electromagnetic pulses, J. Geophys. Res., 112, A06318, doi:10.1029/2006JA011840, 2007. [pdf reprint]

  83. Hand, T., S. A. Cummer, and N. Engheta, The measured electric field spatial distribution within a metamaterial subwavelength cavity resonator, IEEE Transactions on Antennas and Propagation, v. 55, p. 1781, 2007. [pdf reprint]

  84. Thomas, J. N., M. J. Taylor, D. Pautet, M. Bailey, N. Solorzano, R. Holzworth, M. McCarthy, M. Kokorowski, F. Sao Sabbas, O. Pinto, Jr., S. A. Cummer, N. Jaugey, J. Li, and N. J. Schuch, A very active sprite-producing storm observed over Argentina, EOS, v. 88, p. 117, 2007. [pdf reprint]

  85. Cummer, S. A., and D. Schurig, One path to acoustic cloaking, New Journal of Physics, v. 9, 45, 2007. [pdf reprint]


    2006

  86. Farrell, W. M., J. R. Marshall, S. A. Cummer, G. T. Delory, and M. D. Desch, A model of the ULF magnetic and electric field generated from a dust devil, J. Geophys. Res., v. 111, E11004, doi:10.1029/2006JE002689, 2006. [pdf reprint]

  87. Schurig, D., J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. Starr, and D. R. Smith, Demonstration of a metamaterial electromagnetic cloak at microwave frequencies, Science, v. 314, p. 977, 2006. [pdf reprint]

  88. Cummer, S. A., H. U. Frey, S. B. Mende, R. Hsu, H. Su, A. B. Chen, H. Fukunishi, and Y. Takahashi (2006), Simultaneous radio and satellite optical measurements of high-altitude sprite current and lightning continuing current, J. Geophys. Res., 111, A10315, doi:10.1029/2006JA011809. [pdf reprint]

  89. Cummer, S. A., B.-I. Popa, D. Schurig, D. R. Smith, and J. B. Pendry, Full-wave simulations of electromagnetic cloaking structures, Physical Review E, 74, 036621, 2006. [pdf reprint]

  90. Delory, G. T., W. M. Farrell, D. D. Sentman, N. O. Renno, S. K. Atreya, A.-S. Wong, S. A. Cummer, J. R. Marshall, S. C. R. Rafkin, and D. Catling, Oxidant Enhancement in Martian Dust Devils and Storms: Storm Electric Fields and Electron Dissociative Attachment, Astrobiology, v. 6, p. 451-462, 2006. [pdf reprint]

  91. Atreya, S. K., A. S. Wong, N. O. Renno, W. M. Farrell, G. T. Delory, D. Sentman, S. A. Cummer, J. Marshall, S. Rafkin, and D. Catling, Oxidant Enhancement in Martian Dust Devils and Storms: Implication for Life, and Habitability, Astrobiology, v. 6, p. 439-450, 2006. [pdf reprint]

  92. Zhai, Y., S. A. Cummer, and W. M. Farrell (2006), Quasi-electrostatic field analysis and simulation of Martian and terrestrial dust devils, J. Geophys. Res., 111, E06016, doi:10.1029/2005JE002618. [pdf reprint]

  93. Hu, W., and S. A. Cummer, An FDTD model for low and high altitude lightning-generated EM fields, IEEE Transactions on Antennas and Propagation, v. 54, p. 1513-1522, 2006. [pdf reprint]

  94. Xu, Y., S. A. Cummer, and W. M. Farrell (2006), Application of an orbital radar sounder model to detecting Martian polar subsurface features, J. Geophys. Res., 111, E06S17, doi:10.1029/2005JE002547. [pdf reprint]

  95. Cheng, Z., S. A. Cummer, D. N. Baker, and S. G. Kanekal, Nighttime D region electron density profiles and variability measured using broadband VLF energy from lightning, , J. Geophys. Res., v. 111, A05302, doi:10.1029/2005JA011308, 2006. [pdf reprint]

  96. Zhai, Y. and S. A. Cummer, An orthogonal projection and regularization (OPR) technique for magnetospheric radio tomography, J. Geophys. Res., v. 111, A03207, doi:10.1029/2005JA011039, 2006. [pdf reprint]

  97. Cummer, S. A., N. Jaugey, J. Li, W. A. Lyons, T. E. Nelson, and E. A. Gerken, Submillisecond imaging of sprite development and structure, Geophys. Res. Lett., v. 33, L04104, doi:10.1029/2005GL024969, 2006. [pdf reprint]

  98. Popa, B.-I. and S. A. Cummer, Direct measurement of evanescent wave enhancement inside passive metamaterials, Physical Review E, v. 73, 016617, 2006. [pdf reprint]

  99. Farrell, W. M., N. Renno, G. T. Delory, S. A. Cummer, and J. R. Marshall, Integration of Electrostatic and Fluid Dynamics within a Dust Devil, J. Geophys. Res., v. 111, no. E1, E01006, doi: 10.1029/2005JE002527, 2006. [pdf reprint]


    2005

  100. Popa, B.-I. and S. A. Cummer, Determining the effective electromagnetic poperties of negative refractive index metamaterials from internal fields, Physical Review B, v. 72, 165102, 2005. [pdf reprint]

  101. Frey, H. U., S. B. Mende, S. A. Cummer, A. B. Chen, R.-R. Hsu, H.-T. Su, Y.-S. Chang, T. Adachi, H. Fukunishi, and Y. Takahashi, Beta-type stepped leader of elve-producing lightning, Geophysical Research Letters, v. 32, L13824, doi:10.1029/2005GL023080, 2005. [pdf reprint]

  102. Zhai, Y., and S. A. Cummer, A flexible and robust direct reconstruction method for magnetospheric radio tomography, Radio Science, vol. 40, no. 3, RS3004, doi: 10.1029/2004RS003100, 2005. [pdf reprint]

  103. Cummer, S. A., Y. Zhai, W. Hu, D. M. Smith, L. I. Lopez, and M. A. Stanley, Measurements and implications of the relationship between lightning and terrestrial gamma-ray flashes, Geophysical Research Letters, vol. 32, no. 8, L08811, doi:10.1029/2005GL022778, 2005. [pdf reprint]

  104. Cheng, Z. and S. A. Cummer, Broadband VLF measurements of lightning-induced ionospheric perturbations, Geophysical Research Letters, v. 32, L08804, doi:10.1029/2004GL022187, 2005. [pdf reprint]

  105. Cummer, S. A. and W. A. Lyons, Implications of lightning charge moment changes for sprite initiation, Journal of Geophysical Research, v. 110, A04304, doi: 10.1029/2004JA010812, 2005. [pdf reprint]


    2004

  106. Cummer, S. A., and B.-I. Popa, Wave fields measured inside a negative refractive index metamaterial, Applied Physics Letters, v. 85, p. 4564-4566, 2004. [pdf reprint]

  107. Cummer, S. A., Perfectly Matched Layer Behavior in Negative Refractive Index Materials, IEEE Antennas and Wireless Propagation Letters, v. 3, p. 172-175, 2004. [pdf reprint]

  108. Hu, W., and S. A. Cummer, The Nearly Perfectly Matched Layer is a Perfectly Matched Layer, IEEE Antennas and Wireless Propagation Letters, v. 3, p. 137-140, 2004. [pdf reprint]

  109. Farrell, W. M, P. H. Smith, G. T. Delory, G. B. Hillard, J. R. Marshall, D. Catling, M. Hecht, D. M. Tratt, N. Renno, M. D. Desch, S. A. Cummer, J. G. Houser, and B. Johnson, Electric and magnetic signatures of dust devils from the 2000-2001 MATADOR desert tests, Journal of Geophysical Research, v. 109, doi: 10.1029/2003JE002088, 2004. [pdf reprint]

  110. Cummer, S. A., and W. A. Lyons, Lightning charge moment changes in U.S. High Plains thunderstorms, Geophysical Research Letters., v. 31, doi: 10.1029/2003GL019043, 2004. [pdf reprint]


    2003

  111. Cummer, S. A., J. L. Green, B. W. Reinisch, S. F. Fung, M. L. Kaiser, J. S. Pickett, I. Christopher, R. Mutel, D. A. Gurnett, C. P. Escoubet, Advances in magnetospheric radio wave analysis and tomography, Advances in Space Research, v. 32, p. 329, 2003. [pdf reprint]

  112. Lyons, W. A., T. E. Nelson, E. R. Williams, S. A. Cummer, and M. A. Stanley, Characteristics of sprite-producing positive cloud-to-ground lightning during the 19 July 2000 STEPS mesoscale convective systems, Monthly Weather Review, v. 131, p. 2417, 2003. [pdf reprint]

  113. Farrell, W. M., G. T. Delory, S. A. Cummer and J. R. Marshall, A simple electrodynamic model of a dust devil, Geophysical Research Letters, v. 30, doi: 10.1029/2003GL017606, 2003. [pdf reprint]

  114. Cummer, S. A., Current moment in sprite-producing lightning, Journal of Atmospheric and Solar-Terrestrial Physics, v. 65, p. 499, 2003. [pdf reprint]

  115. Cummer, S. A., Dynamics of causal beam refraction in negative refractive index materials, Applied Physics Letters, v. 82, p. 2008, 2003. [pdf reprint]

  116. Cummer, S. A., A simple, nearly perfectly matched layer for general electromagnetic media, IEEE Microwave and Wireless Components Letters, v. 13, p. 128, 2003. [pdf reprint]

  117. Cummer, S. A., Simulated causal subwavelength focusing by a negative refractive index slab, Applied Physics Letters, v. 82, p. 1503, 2003. [pdf reprint]


    2002

  118. Hu, W., S. A. Cummer, W. A. Lyons, and T. E. Nelson, Lightning charge moment changes for the initiation of sprites, Geophysical Research Letters, v. 29, no. 8, 1279, doi:10.1029/2001GL014593, 2002. [pdf reprint]


    2001

  119. Ostgaard, N., J. Stadsnes, J. Bjordal, G. A. Germany, R. R. Vondrak, G. K. Parks. S. A. Cummer, D. L. Chenette, and J. G. Pronko, Auroral electron distributions derived from combined UV and X-ray emissions, Journal of Geophysical Research, v. 106, p. 26081, 2001. [pdf reprint]

  120. Cummer, S. A., M. J. Reiner, B. W. Reinisch, M. L. Kaiser, J. L. Green, R. F. Benson, R. Manning, and K. Goetz, A test of magnetospheric radio tomographic imaging with IMAGE and WIND, Geophysical Research Letters, v. 28, p. 1131, 2001. [pdf reprint]

  121. Cummer, S. A., and M. Fullekrug, Unusually intense continuing current in lightning produces delayed mesospheric breakdown, Geophysical Research Letters, v. 28, p. 495, 2001. [pdf reprint]


    2000

  122. Cummer, S. A., Modeling electromagnetic propagation in the Earth-ionosphere waveguide, IEEE Transactions on Antennas and Propagation, v. 48, p. 1420, 2000. [pdf reprint]

  123. Cummer, S. A., and U. S. Inan, Ionospheric E region remote sensing with ELF radio atmospherics, Radio Science, v. 35, p. 1437, 2000. [pdf reprint]

  124. Ostgaard, N., J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A. Cummer, D. L. Chenette, M. Schulz, and J. G. Pronko, Cause of the localized maximum of X-ray emission in the morning sector: A comparison with electron measurements, Journal of Geophysical Research, v. 105, p. 20869, 2000. [pdf reprint]

  125. Ostgaard, N., J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A. Cummer, D. L. Chenette, M. Schulz, G. K. Parks, M. J. Brittnacher, D. L. McKenzie, and J. G. Pronko, Global X-ray emission suring an isolated substormÑA case study, Journal of Atmospheric and Terrestrial Physics, v. 62, p. 889, 2000. [pdf reprint]

  126. Gjerloev, J. W., E. Friis-Christensen, R. A. Hoffman, and S. A. Cummer, The Harang discontinuity in auroral substorms, Magnetospheric Current Systems, AGU Geophysical Monograph 118, p. 209, 2000.

  127. Cummer, S. A., R. R. Vondrak, R. F. Pfaff, J. W. Gjerloev, C. W. Carlson, R. E. Ergun, W. J. Peria, R. C. Elphic, R. J. Strangeway, J. B. Sigwarth, L. A. Frank, Auroral surge currents and electrodynamics with FAST and VIS, Magnetospheric Current Systems, AGU Geophysical Monograph 118, p. 191, 2000. [pdf reprint]

  128. Cummer, S. A., and U. S. Inan, Modeling ELF radio atmospheric propagation and extracting lightning currents from ELF observations, Radio Science, v. 35, p. 385, 2000. [pdf reprint]

  129. Stanley, M., M. Brook, P. Krehbiel, and S. A. Cummer, Detection of daytime sprites via a unique sprite ELF signature, Geophysical Research Letters, v. 27, p. 875, 2000. [pdf reprint]

  130. Cummer, S. A., R. R. Vondrak, N. Ostgaard, J. Stadsnes, J. Bjordal, D. L. Chenette, M. J. Brittnacher, G. K. Parks, J. B. Sigwarth, L. A. Frank, Global multispectral auroral imaging of an isolated substorm, Geophysical Research Letters, v. 27, p. 637, 2000. [pdf reprint]


    1999

  131. Barrington-Leigh, C. P., U. S. Inan, M. Stanley, and S. A. Cummer, Sprites triggered by negative lightning discharges, Geophysical Research Letters, v. 26, p. 3605, 1999. [pdf reprint]

  132. Cummer, S. A., and M. Stanley, Submillisecond resolution lightning currents and sprite development: Observations and implications, Geophysical Research Letters, v. 26, p. 3205, 1999. [pdf reprint]

  133. Cummer, S. A., and W. M. Farrell, Radio atmospheric propagation on Mars and potential remote sensing applications, Journal of Geophysical Research, v. 104, p. 14149, 1999. [pdf reprint]

  134. Ostgaard, N., J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A. Cummer, D. L. Chenette, G. K. Parks, M. J. Brittnacher, and D. L. McKenzie, Global scale electron precipitation features seen in UV and x-rays during substorms, Journal of Geophysical Research, v. 104, p. 10191, 1999. [pdf reprint]

  135. Farrell, W. M., M. L. Kaiser, M. D. Desch, J. G. Houser, S. A. Cummer, D. M. Wilt, and G. A. Landis, Detecting electrical activity from martian dust storms, Journal of Geophysical Research, v. 104, p. 3795, 1999. [pdf reprint]


    1998

  136. Cummer, S. A., U. S. Inan, and T. F. Bell, Ionospheric D region remote sensing using VLF radio atmospherics, Radio Science, v. 33, p. 1781, 1998. [pdf reprint]

  137. Foster, J. C., S. A. Cummer, and U. S. Inan, Mid-latitude particle and electric field effects at the onset of the November 1993 geomagnetic storm, Journal of Geophysical Research, v. 103, p. 26359, 1998. [pdf reprint]

  138. Cummer, S. A., U. S. Inan, T. F. Bell, and C. P. Barrington-Leigh, ELF radiation produced by electrical currents in sprites, Geophysical Research Letters, v. 25, p. 1281, 1998. [pdf reprint]


    1997

  139. Cummer, S. A. and U. S. Inan, Measurement of charge transfer in sprite-producing lightning using ELF radio atmospherics, Geophysical Research Letters, v. 24, p. 1731, 1997. [pdf reprint]

  140. Kelley, M. C., S. D. Baker, R. H. Holzworth, P. Argo, and S. A. Cummer, LF and MF observations of the lightning electromagnetic pulse at ionospheric altitudes, Geophysical Research Letters, v. 24, p. 1111, 1997. [pdf reprint]

  141. Cummer, S. A., T. F. Bell, U. S. Inan, and D. L. Chenette, VLF remote sensing of high energy auroral particle precipitation, Journal of Geophysical Research, v. 102, p. 7477, 1997. [pdf reprint]

  142. Cummer, S. A., An analysis of new and existing FDTD methods for isotropic cold plasma and a method for increasing their accuracy, IEEE Transactions on Antennas and Propagation, v. 45, p. 392, 1997. [pdf reprint]


    1996

  143. Cummer, S. A., T. F. Bell, U. S. Inan, and L. J. Zanetti, VLF remote sensing of the auroral electrojet, Journal of Geophysical Research, v. 101, p. 5381, 1996. [pdf reprint]


    1995

  144. Bell T. F., U. S. Inan, M. T. Danielson, and S. A. Cummer, VLF signatures of ionospheric heating by HIPAS, Radio Science, v. 30, p. 1855, 1995. [pdf reprint]

Last update: June 22, 2009