Publications

Press Releases

• High school student excels in Wright State's sensors physics research lab Wright State Newsroom*new*
• Ohio Is A Leader In Terahertz Technology WOUB Public Media
• Defense Department awards Wright State $750,000 semiconductor research contract Wright State Newsroom
• Breakthrough Sought in Detection of Viruses Dayton Daily News

Publications

"A Nonlinear Circuit Model for Switching Process in Quantum Well Devices," W-D. Zhang, E. R. Brown, T. A. Growden and P. R. Berger, vol. 99, pp. 1-5, IEEE Trans. Elect. Dev. 2016.

"Highly repeatable room temperature negative differential resistance in AlN/GaN resonant tunneling diodes grown by molecular beam epitaxy," T. A. Growden, D. F. Storm, W-D. Zhang, E. R. Brown, D. J. Meyer, P. Fakhimi, and P. R. Berger, Appl. Phys. Lett., 109, 083504, 2016.

 "Evolution of THz impulse imaging radar to 1550 nm photoconductive switches,"  E. R. Brown, W-D. Zhang, A Feldman, T. Harvey, R. P. Mirin, S. Sung, W. S. Grundfest, Z. D.  Tyler, Proc. SPIE 9854, Image Sensing Technologies: Materials, Devices, Systems, and Applications III, 98540L (May 26, 2016); doi:10.1117/12.2224919.

"Red-shift in THz resonant signatures induced by hydration variation," W-D. Zhang and E. R. Brown, IRMMW 2016, September 25-30, Copenhagen Denmark.

"Model for ultrafast extrinsic photoconductivity in Er-Doped GaAs," E. R. Brown and W-D. Zhang,  IRMMW 2016, September 25-30, Copenhagen Denmark.

 "THz power measurements with room-temp pyroelectric detectors, " E. R. Brown, H. Bagherzadeh, and W-D. Zhang, IRMMW 2016, September 25-30, Copenhagen Denmark.

"High fill-factor interdigital electrodes for Terahertz spectroscopy," W-D. Zhang, M. Mingardi, and E. R. Brown, IRMMW 2016, September 25-30, Copenhagen Denmark.

 "Imaging the Hydration Level of Human Skin with A Millimeter-Wave Reflectometer," W-D. Zhang and E. R. Brown, IEEE NAECON 2016, July 26-29, Dayton, USA.

" Non-contact, antenna-free probe for characterization of THz devices and components," A. Mingardi,W-D. Zhang and E. R. Brown, IEEE NAECON 2016, July 26-29, Dayton, USA.

 "A millimeter-wave reflectometer for whole-body hydration sensing," W-D Zhang, E. R. Brown, SPIE9829, Radar Sensor Technology XX, 98290E, doi: 10.1117/12.2224273, 2016.

"Sensitivity and Selectivity in the THz Spectroscopy of Bioparticles and Biomolecules," E. R. Brown, W-D. Zhang, L. Viveros, and  E.A, Mendoza,NATO Science for Peace and Security, November, 2015.

"MM-Wave-to-THz Modulation with Graphene-Oxide-Silicon Etalon Structures,"  W-D. Zhang, P. H. Q. Pham, E. R. Brown, and P .J .Burke, PIERS 2015 in Prague.

 "THz Characterzation of ITO films on p-Si substrates, "E. R. Brown, W-D. Zhang, and G. T. Mearini, PIERS 2015 in Prague.

 "Detection of DNA by Graphene-on-Silicon FET Structures Simultaneously at DC and 101 GHz," E. R. Brown, W-D. Zhang, L. Viveros, D. Neff, N. S. Green, M. L. Norton, European Microwave Conference 2015, September, Paris. 

"Experimental Determination of Quantum-Well Lifetime Effect on Large-Signal Resonant Tunneling Diode Switching Time, T. A. Growden, E. R. Brown, W-D. Zhang, R. Droopad, and P. R. Berger, Appl. Phys. Lett. 107, p153506, 2015.

"THz Behavior of Indium-Tin-Oxide Films on p-Si Substrates," E. R. Brown,W-D. Zhang,H. Chen, and G. T. Mearini, Appl. Phys. Lett. , 107, p. 091102 2015.

 "Sensing of DNA by graphene-on-silicon FET structures at DC and 101GHz," E. R. Brown, W-D. Zhang, L. Viveros, D. Neff, N. S. Green, M. L. Norton, Sensing and Bio-Sensing Research, Page 19-23, vol. 5.  2015.

"Demonstration of a GaAs-based 1550-nm continuous wave photomixer," W-D. Zhang, J. R. Middendorf and E. R. Brown, Appl. Phys. Lett. 106, 021119, 2015.

"First Demonstration Of Photomixing At 1550 Nm In ErAs:GaAs" John R. Middendorf, W-D. Zhang, Matthieu Martin, Elliott R. Brown, 39th IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014

"Continuously Variable Substrate-based THz Beamsplitter" John R. Middendorf, John Cetnar, Elliott R. Brown, 39th IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014.

"Low-cost High Fill-factor Polarizers With Low Insertion-loss Using An Anti-reflection Coating" John. R Middendorf, John Cetnar, Elliott R. Brown, 39th IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014.

"Fast-Scanning Fabry-Perot Spectrum Analyzer With Continuously Tunable Resolution" John R. Middendorf, Elliott R. Brown, 39th IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014.

"1550-nm Time-Domain Study of ErAs:GaAs Photoconductive Switches Function of the Erbium Concentration, " Matthieu Martin, John R. Middendorf, Elliott R. Brown, 39th IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014.

"Non-Contact Probes for Characterization of THz Devices and Components," Matthieu Martin, Prasanna Kumar Daram, Elliott R. Brown IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014

"AC Conductivity Parameters of Graphene Films with THz Spectroscopy ," W-D. Zhang, E. R. Brown, Phi H. O. Pham and P. Burke, NAECON Conference, Dayton, June 25-27,2014.

"Concentration of Terahertz Radiation for Microsample Spectroscopy," W-D. zhang, L. Viveros , E. R. Brown to be presented at IRMMW-THz Symposium, Tucson, AZ, September 14-19, 2014.

"1550-nm Time-Domain Study of ErAs:GaAs Photoconductive Switches as a Function of the Erbium Concentration ," Matthieu Martin, John R. Middendorf, and Elliott R. Brown, NAECON Conference, Dayton, June 25-27, 2014

"Saturated Low Temperature Conductivity in Ultrafast Semiconductor Nanocomposites," W. Zhang, M. Martin and E. R. Brown, Phys. Status RRL. Vol. 8, No. 4, pp.367-370, 2014

"Non-Contact Probes for THz Integrated Devices Based on Fiber-Coupled Photomixers," M. Martin, P. K. Daram, E. R. Brown, SPIE Photonics West, San Franscico, 8995-10, 2014

"ErAs:GaAs Extrinsic Photoconductivity: A New Alternative for 1550‑nm-Driven THz Sources (Invited)," M. Martin, J. Middendorf, E. R. Brown, SPIE Photonics West, San Franscico, 8995-1, 2014

"THz Signatures of DNA in Nanochannels under Electrophoretic Control" E.R. Brown, E.A. Mendoza, Y. Kuznetsova, A. Neumann, S.R.J Brueck, IEEE Sensors Proceedings, Baltimore 2013

"Terahertz Detection of Bacillus Thuringienisis Spores in DiPel" L. Viveros, W. Zhang, E.R. Brown, IEEE Sensors Proceedings, Baltimore 2013

"Terahertz Conical Horn Waveguide Coupler for Spectroscopic Analysis of Biomaterials" W. Zhang, E.R. Brown, L. Viveros, IEEE Sensors Proceedings, Baltimore 2013

"A study of ultrafast extrinsic photoconductivity vs wavelength in ErAs:GaAs photoconductive switches", J.R. Middendorf and E.R. Brown, 38th IRMMW-THz Symposium, Mainz, Germany, September 1-6, 2013

"Critical Comparison of the THz Performance from ErAs:GaAs and Br-Irradiated In0.53Ga0.47As 1.55-μm-Driven Photoconductive Antennas", M. Martin, J.R. Middendorf, E.R. Brown, and J. Mangeney, 38th IRMMW-THZ Symposium, Mainz, Germany, September 1-6, 2013

"Effective Fill-Factor Design Results in Extraordinary Optical Transmission in a THz Wire-Grid Polarizer", J.S. Cetnar, J.R. Middendorf and E.R. Brown, 38th IRMMW-Thz Symposium, Mainz, Germany, September 1-6, 2013

"The Effect of Er fraction on Thz Power generated by extrinsic-photoconductive ErAs:GaAs switches driven at 1550 nm", J.R. Middendorf and E.R. Brown, 38th IRMMW-THz Symposium, Mainz, Germany, September 1-6, 2013

"Narrow Terahertz Attenuation Signature in Bacillus Thuringiensis," W. Zhang, E. R. Brown, L. Viveros, K. Burris, and N. Stewart, J. Biophotonics, published online 2 July 2013, DOI 10.1002/jbio.201300042.

"THz Medical Imaging Using Broadband Direct Detection," Zachary D. Taylor, James Garritano, Priyamvada Tewari, Eric Diebold, Jun Sung, Neha Bajwa, Bryan Nowroozi, Alexander Stojadinovic, Nuria Llombart, Elliott Brown, Warren Grundfest, SPIE Photonics West, San Franscico, February 2-7, 2013

"Observation of terahertz absorption signatures in microliter DNA solutions," W. Zhang, E. R. Brown, M. Rahman, and M. L. Norton, Appl. Phy. Lett. 102, 023701, 2013

"Design of Multi-Order Diffractive THz Lenses," J. R. Middendorf, D. A. LeMaster, M. Zarepoor, and E. R. Brown, IRMMW-THz Symposium, Wollongong, Australia, September 23-28, 2012

"Critical Comparison of Carrier Lifetime at 1.55 μm of Ion-Irradiated InGaAs, Cold-Implanted InGaAsP, and ErAs:GaAs," M. Martin, E. R. Brown, J. Mangeney, A. Fekecs, R. Arès, and D. Morris, IRMMW-THz Symposium, Wollongong, Australia, September 23-28, 2012

"Extrinsic Photoconductivity at 1550 nm and 1030 nm for THz Generation," J. R. Middendorf and E. R. Brown, IRMMW-THz Symposium, Wollongong, Australia, September 23-28, 2012

"Terahertz Graphene Optics," N. Rouhi, S. Capdevila, D. Jain, K. Zand, Y. Yu Wang, E. Brown, L Jofre, and P. Burke, Nano Research, DOI10.1007/s12274-012-0251-0, Tsingua Press, September 2012

"Graphite-based Material Development for Reconfigurable Antennas," Christie L. H. Devlin, Robert H. Salter, Elliott R. Brown, F. Lincoln Vogel, Christopher E. Bunker, K. A. Shiral Fernando, and Robert L. Ewing, NAECON Conference, Dayton, July 25-27, 2012

"Finite-Element Simulation and Design of a High-Extinction-Ratio THz Wire-Grid Polarizer," John S. Cetnar, John R. Middendorf, and Elliott R. Brown, NAECON Conference, Dayton, July 25-27, 2012

"A New Approach to On-Chip Probing in the MMWave to THz Range," Mads J. H. Larsen and E. R. Brown, NAECON Conference, Dayton, July 25-27, 2012

"Dissolution kinetics of gypsum {010} surfaces," Dennis Lennaerts, Matthieu Martin, Elliott R. Brown, and Steven R. Higgins, 43th American Chemical Society Central Regional Meeting, Dearborn, Michigan, June 7, 2012

"Extraordinary optical transmission and extinction in a Terahertz wire-grid polarizer," John S. Cetnar, John R. Middendorf, and Elliott R. Brown, Appl. Phy. Lett. 100, 231912, 2012

"THz Generation Using Extrinsic Photoconductivity at 1550 nm," J. R. Middendorf and E. R. Brown, Opt. Expr. 20, 163827, 2012

"Concentration Methods for High-Resolution THz Spectroscopy of Nucleic-Acid Biomolecules and Crystals," E. R. Brown, W. Zhang, E.A. Mendoza, Y. Kuznetsova, S.R.J. Brueck, M. Rahman, and M.L. Norton, Conference #8221, SPIE Photonics West, San Franscico, January 21-26, 2012

"Critical Comparison of GaAs and InGaAs THz Photoconductors," Matthieu Martin and Elliott R. Brown, Conference #8261, SPIE Photonics West, San Franscico, January 21-26, 2012

"A 280-GHz Schottky Diode Detector in 130-nm Digital CMOS," Ruonan Han, Yaming Zhang, Dominique Coquillat, Hadley Videlier,Wojciech Knap, Elliott Brown,and Kenneth K. O., IEEE Journal of Solid-State Circuits 46, 2602, 2011

"High Speed THz Spectroscopy Using Fast Scanning Fabry-Perot," John R. Middendorf and Elliott R. Brown, IRMMW-THz Symposium, Houston, Texas, October 2-7, 2011

"Database of all THz Signatures measured on Solids and Liquids in the range 100 GHz to 10 THz," Renjith G. Mathew, John R. Middendorf, and Elliott R. Brown, IRMMW-THz Symposium, Houston, Texas, October 2-7, 2011

"Comparison of THz and Near-IR Scattering Effects from Air-Solid Interfaces," E.R. Brown, D.B. Bennett, W. Zhang, Z.D. Taylor, W.S. Grundfest, IRMMW-THz Symposium, Houston, Texas, October 2-7, 2011

"THz Medical Imaging: in vivo Hydration Sensing," Zachary D. Taylor Member, IEEE, Rahul S. Singh Member, IEEE, David B. Bennett Member, IEEE, Priyamvada Tewari, Colin P. Kealey, Neha Bajwa, Martin O. CuljatMember, IEEE, Alexander Stojadinovic, Jean-Pierre Hubschman, Elliott R. Brown Fellow, IEEE, and Warren S. Grundfest, Fellow, IEEE, accepted to Special Inaugrual Issue  IEEE Transactions on Terahertz Science and Technology,Vol. 1, Sept. 2011.

"Terahertz Time-Lapse Imaging of Hydration in Physiological Tissues," David B. Bennett, Zachary D. Taylor, Neha Bajwa, Priyamvada Tewari, Ashkan Maccabi,Shijun Sung, Rahul S. Singh, Martin O. Culjat, Warren S. Grundfest, and Elliott R. Brown,Proceedings, Society of Photo-Optical Instrumentation Engineers (SPIE), Conference #7938, presented at Photonics West, San Francisco, CA, 27 January 2011.

"Terahertz Sensing in Corneal Tissues," David Bennett, Zachary Taylor, Pria Tewari, Rahul Singh, Martin Culjat, Warren Grundfest,Daniel Sassoon, R Duncan Johnson, Jean-Pierre Hubschman, Elliott R. Brown,Accepted to the Journal of Biomedical Optics, March 2011.

"High frequency Sheet Conductance of Few-Layer Graphene," Nima Rouhi, Dheeraj Jain, Santiago Capdevila, Lluis Jofre, Elliott Brown, Peter J. Burke. Submission to IEEE Nano 2011.

"Second-Order Bandpass THz Filter Achieved by Multilayer Complementary Metamaterial Structures", Mingzhi Lu, Wenzao Li, and Elliott R. Brown, Opt. Lett. 36, 1071, 2011.

"Stratified Media Model for Terahertz Reflectometry of the Skin," D. B. Bennett, W. Li, Z. D. Taylor, W.S. Grundfest, and E. R. Brown, IEEE Sensors Journal 11, 1253, 2011.

"Advancements in Photomixing and Photoconductive Switching for THz Spectroscopy and Imaging," E. R. Brown, Conference #7938, SPIE Photonics West, San Franscico, January 22-27, 2011.

"High Resolution THz Spectroscopy to Measure Strong THz Absorption Signatures of si‐RNA in Solution," E. R. Brown, E. A. Mendoza, Y. Kuznetsova, A. Neumann, and S.R.J. Brueck, Proceedings of the NATO Advanced Research Workshop on Terahertz and Mid-Infrared Radiation: Basic Research and Applications (TERA-MIR 2009), Springer NATO Science for Peace and Security Series B: Physics and Biophysics.

"Narrow THz Spectral Signatures through DNA and RNA in Nanofluidic Channels," E.R. Brown, E.A. Mendoza, D-Y. Xia, and S.R.J. Brueck, IEEE Sensors Journal 10, 755, 2010.

"Characterization and Modeling of a THz Photoconductive Switch," J. Y. Suen, W. Li,  Z. D. Taylor, and E.R. Brown, Appl. Phys. Lett. 96, 141103, 2010.

"Towards a 1550 nm InGaAs Photoconductive Switch," K. K. Williams, Z.D. Taylor, J.Y. Suen, Hong Lu, R.S. Singh, A.C. Gossard, and E.R. Brown, Opt. Lett. 34, No. 20, 2009.

"High-Spectral-Resolution THz Reflective Imaging Based on a Tandem-Bandpass Filter," K. K. Williams and E. R. Brown, 2009 Nanoelectronic Devices for Defense and Security Conference, Ft. Lauderdale, FL, 29 Sept. 2009.

Invited Talks 2011

• "Advancements in Photomixing and Photoconductive Switching for THz Spectroscopy and Imaging" Invited Paper presented at 2011 SPIE Photonics West, San Francisco, CA, 27 January 2011.
• "Towards 1-mW THz Photoconductive Sources with Low-Cost Laser Drivers" in Special Session on Optics Sensors", Optical Society of America Advanced Photonics Congress, June 12-16, 2011 at the Westin Harbour Castle, Toronto, Canada.
• "Strong THz Signatures from Nucleic-Acid Biomolecules in Nanochannels with Electrophoretic Control," NSF Russian-American Workshop on Emerging Trends in Bioelectronics," at the St. Petersburg Academic University (http://edu.ioffe.ru/index1_en.html), St. Petersburg, June 27-28, 2011
• "Towards the Commercialization of THz Photoconductive Switches and Photomixers," SPIE Optics and Photonics 2011, Conference on Terahertz Emitters, Receivers, and Applications II, 21-25 August 2011, San Diego, CA.
• "Experimental Design for THz Spectroscopy of Single-Crystal DNA", 2011 NANO-DDS Conference, 29 August - 1 September 2011, Brooklyn NY.

Best Paper Awards

• "High-Spectral-Resolution THz Reflective Imaging Based on a Tandem-Bandpass Filter", K. K. Williams and E. R. Brown, 2009 Nanoelectronic Devices for Defense and Security Conference, Ft. Lauderdale, FL, 29 Sept. 2009.