Dr. Ryan Christopher Toonen

Dr. Ryan Christopher Toonen

Title: Assistant Professor
Department: Electrical and Computer Engineering
Office: ASEC 555
Phone: 330-972-4259
Fax: 330-972-6487


Dr. Ryan Christopher Toonen is an Assistant Professor in the Department of Electrical and Computer Engineering at the University of Akron.  He received his Ph.D. in Electrical Engineering from the University of Wisconsin at Madison in 2007.  From this institution, he also received the M.A. Physics, M.S. Electrical Engineering, B.S. Electrical Engineering, and B.S. Applied Mathematics, Engineering and Physics degrees.  He was previously a postdoctoral research associate at the National Institute of Standards and Technology (NIST) in Boulder, Colorado and a research engineer at the U.S. Army Research Laboratory (ARL).  While working at NIST, he contributed to an effort that led to the electronic re-definition of the Boltzmann constant.  While working at ARL, he received the prestigious 2012 Army Research and Development Achievement (RDA) Award for Outstanding Technical Achievement.  During his research career he has gained expertise in the areas of applied physics, electronic devices and materials, and experimental microwave science.  Prior to this career, he had worked in the field of mixed-signal Application Specific Integrated Circuits (ASICs) as a design engineer.  He has authored and coauthored a number of refereed publications addressing a diverse range of topics that include: complex oxide physics, agile microwave engineering, applied superconductivity, quantum dot transport, and instrumentation and measurement techniques.


Journal Papers

Ryan C. Toonen and M. W. Cole, “Third-order electric-field-induced dipolar resonances from patterned barium-strontium-titanate thin-films,” Appl. Phys. Lett. 100, 222908 (2012).

M. W. Cole, R. C. Toonen, M. Ivill, S. G. Hirsch, E. Ngo, and C. Hubbard, “Ultraviolet assisted processing: A unique approach to mitigate oxygen vacancies and attain low loss highly tunable Ba0.60Sr0.40TiO3 thin films,” J. Appl. Phys. 110, 124105 (2011).

M. W. Cole, R. C. Toonen, S. G. Hirsch, M. Ivill, E. Ngo, C. Hubbard, S. Ramanathan, and A. Podpirka, “An Elegant Post-Growth Process Science Protocol to Improve the Material Properties of Complex Oxide Thin Films for Tunable Device Applications,” Integrated Ferroelectrics 126, 34 (2011).

R. X. Fu, R. C. Toonen, E. H. Ngo, M. W. Cole, S. G. Hirsch, M. P. Ivill, and C. W. Hubbard, “Pb(Zr,Ti)O3 (PZT) Thin Film Sensors for Fully-Integrated, Passive Telemetric Transponders,” Sensors & Transducers J. 11, 34 (2011).

M. W. Cole, R. C. Toonen, S. G. Hirsch, E. Ngo, R. R. Romanofsky, F. Van Keuls, C. Hubbard, M. Ivill, and D. Demaree, “Ba0.60Sr0.40TiO3 Thin Films for Microwave Phase Shifter Devices: The Influence of Crystallization Temperature on the Electric Field Dependent Phase Shift Response,” Integr. Ferroelectrics: Int. J. 111, 1, 68 (2009).

C. V. Weiss, M. B. Okatan, S. P. Alpay, M. W. Cole, E. Ngo, and R. C. Toonen, "Compositionally Graded Ferroelectric Multilayers for Frequency Agile Tunable Devices," J. Mater. Sci. 44, 5364 (2009).

C. V. Weiss, M. W. Cole, S. P. Alpay, E. Ngo, R. C. Toonen, S. G. Hirsch, J. D. Demaree, and C. Hubbard, "Dielectric Response of Variable Thickness Ba0.6Sr0.4TiO3 Films for Property-Specific Device Applications," Integrated Ferroelectrics 100, 36 (2008).

R. C. Toonen and S. P. Benz, “Nonlinear behavior of electronic components characterized with precision multitones from a Josephson arbitrary waveform synthesizer,” IEEE Trans. Appl. Supercond. 19, 715 (2009).

R. C. Toonen, C. C. Haselby and R. H. Blick, “An Ultra-Wideband Cross-Correlation Radiometer for Mesoscopic Experiments,” IEEE Trans. Instrum. Meas. 57, 2874 (2008).

H. Qin, N. Shaji, N. E. Merrill, H. S. Kim, R. C. Toonen, R. H. Blick, M. M. Roberts, D. E. Savage, M. G. Lagally, G. Celler, “Formation of microtubes from strained SiGe/Si heterostructures,” New J. Phys. 7, 241 (2005).

M. Prada, R. C. Toonen, R. H. Blick, and P. Harrison, “Electron-Nuclear Spin Interaction in Triple Quantum Dots Systems,” Nanotechnology 16, S1 (2005).

Conference Proceedings

R. C. Toonen, E. H. Ngo, M. W. Cole, S. G. Hirsch, M. P. Ivill, C. W. Hubbard, and R. X. Fu, "Tunable Split-Ring Resonator Devices for Compact, Frequency-Selective, Back-Scatter Transponders," 27th Army Science Conf. Proc. NP-12 (December 2010).

M. W. Cole, E. Ngo, A. Podpirka, S. Ramanathan, M. Ivill, R. C. Toonen, S. G. Hirsch, and C. Hubbard, "Improved Material Properties of Complex Oxide Thin Films for Application in Phased Array Antennas," ASCE Conference Proceedings 366, 328 (2010).

R. C. Toonen, M. Prada, H. Qin, A. K. Huettel, S. Goswami, M. A. Eriksson, D. W. van der Weide, K. Eberl, and R. H. Blick, "Measurements of Correlated Conductances and Noise Fluctuations from 3-Lead Quantum Dots," AIP Conference Proceedings 780, 472 (2005).


Toonen, Ryan Christopher.  2013.  “Sub-Skin-Depth Microfabricated Transmission Lines for Inconspicuous Communication Circuitry.”  U. S. Patent Application 61862656, filed August 2013.  Patent Pending.


Ph.D. Electrical Engineering; M.A. Physics, 2007; M.S. Electrical Engineering, 2005; B.S. Electrical Engineering, 2002; B.S. Applied Mathematics, Engineering & Physics, 1999, University of Wisconsin–Madison.


4400:498/598 Principles of Nanoelectronics, Senior and Graduate Level Course, Fall 2013