Selected Research Publications

  • D. Roy Chowdhury, John F. O’Hara, A. J. Taylor and A. K. Azad, “Orthogonally twisted planar concentric split ring resonators towards strong near field coupled terahertz metamaterials,” Appl. Phys. Lett. 104, 101105 (2014).
  • W. Withayachumnankul, John F. O’Hara, W. Cao, I. Al-Naib, and W. Zhang, “Limitation in thin-film sensing with transmission-mode terahertz time-domain spectroscopy,” Opt. Express 22(1), 972-985 (2014).
  • S. Ramani, M. T. Reiten, P. L. Colestock, A. J. Taylor, A. K. Azad, and John F. O’Hara, “Electromagnetic response of finite metafilm arrays excited on total internal reflection boundaries,” IEEE Trans. Terahz. Sci. Tech. 3(6), 709-720 (2013). (Invited article in Special Issue)
  • John F. O’Hara, P. L. Colestock, and A. K. Azad, “A partial-element analysis method for determining resonator coupling in terahertz metamaterials,” Terahertz Science and Technology 6, 95 (2013). (Invited)
  • A. Azad, John F. O’Hara, R. Singh, H.T. Chen, and A. J. Taylor, “A Review of Terahertz Plasmonics in Subwavelength Holes on Conducting Films,” IEEE J. of Sel. Topics Quantum Electronics 19, 8400416 (2013). (Invited Review Article)
  • P. Colestock, M. T. Reiten, and John F. O’Hara, “Modeling active and passive nonlinear metamaterials,” Metamaterials 6, 8-26 (2012).
  • J. Zhou, D. Roy Chowdhury, R. Zhao, A. K. Azad, H.T. Chen, C. M. Soukoulis, A. J. Taylor, and John F. O’Hara, “Terahertz chiral metamaterials with giant and dynamically tunable optical activity,” Phys. Rev. B 86, 035448 (2012).
  • C. L. Holloway, E. F. Kuester, J. A. Gordon, John F. O’Hara, J. Booth, and D. R. Smith, “An overview of the theory and applications of metasurfaces: the two-dimensional equivalents of metamaterials,” IEEE Ant. Prop. Mag. 54(2), 10 (2012).
  • John F. O’Hara, W. Withayachumnankul, and I. Al-Naib, “A Review on Thin-Film Sensing with Terahertz Waves,” J. Infrared Millim. Terahz. Waves 33(3), 245-291 (2012). (Invited Review Article)
  • V. H. Whitley, D. E. Hooks, K. J. Ramos, John F. O’Hara, A. K. Azad, A. J. Taylor, J. Barber, and R. D. Averitt, “Polarization orientation dependence of the far infrared spectra of oriented single crystals of 1,3,5-trinitro-s-triazine (RDX) using terahertz time-domain spectroscopy,” Anal. Bioanal. Chem. 395, 315 (2009).
  • John F. O’Hara, R. Singh, I. Brener, E. Smirnova, J. Han, A. J. Taylor, and W. Zhang, “Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations,” Opt. Express 16, 1786 (2008).
  • H.-T. Chen, John F. O’Hara, A.K. Azad, A.J. Taylor, R.D. Averitt, D.B. Shrekenhamer, and W.J. Padilla, “Experimental demonstration of frequency-agile terahertz metamaterials,” Nat. Photonics 2, 295 (2008).
  • John F. O’Hara, R.D. Averitt, A.J. Taylor, “Prism coupling to terahertz surface plasmon polaritons,” Opt. Express 13, 6117-6126 (2005).
  • John O’Hara and D. Grischkowsky, “Quasi-optic synthetic phased-array terahertz imaging,” J. Opt. Soc. Am. B 21, 1178-1191 (2004).


Wavetech is currently active in the following research areas:

  • Nonlinear metamaterials
  • Ultrafast pulse measurement
  • Dynamic terahertz metamaterials
  • Terahertz surfaces waves

Research Team

Principal Wavetech employees are all actively involved in research and development. Our researchers either hold a doctorate degree in engineering or are currently pursuing engineering graduate studies. We also collaborate with numerous very well-respected scientists and professors, nationwide. Wavetech is owned and operated by John O'Hara, Ph.D., who also serves as an adjunct faculty at Oklahoma State University.

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