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Niru Nahar

  • Research Assistant Professor, Electrical & Computer Engr.
  • Room #263
    1330 Kinnear Rd
    Columbus, OH 43212
  • 614-292-1588

About

Dr. Niru K. Nahar received B.Sc. (honors) in physics from the Dhaka University, Bangladesh. She received MS degree in physics from Indiana University of Pennsylvania, Indiana, PA. She received her MS and PhD degrees in Electrical and Computer Engineering from The Ohio State University in 2002 and 2008, respectively. She has been working as a Researcher with the ElectroScience Laboratory, The Ohio State University since 2008, where she is currently a Research Scientist. She is also the Operational Manager of the new HELIOS (THz & mm-Wave) Laboratory at OSU which was established with the 3M grant from Ohio 3rd Frontier. She has over three years of research experience in Optometry and Vision Science. She has also worked as a research intern at the Surface Analysis lab in the Chemical & Metallurgical Division of Osram Sylvania Inc., Towanda, PA.

Dr. Nahar is a Senior Member of IEEE and member of Antenna and Propagation Society, IEEE Lasers and Electro-Optics, and The Optical Society (OSA). She served as Secretary/Treasurer, Vice Chairman and Chairman of IEEE Joint AP/MTT Chapter Columbus Section from 2011-2014. She also serves as a reviewer for the journals such as, IEEE Antennas and Wireless Propagation Letters; Optometry Journal of the American Optometric Association; IEEE Transactions on Geoscience and Remote Sensing; Antennas and Propagation Magazine; Journal of Infrared, Millimeter, and Terahertz Waves; IET Microwaves, Antennas & Propagation; Progress In Electromagnetics Research; Optics Communications; Saudi Journal of Ophthalmology; and Journal of Stress and Health.

Research Interests

Her current research interests include THz sensing, imaging, filters and spectroscopy, metamaterials, conformal RF-EO systems, phased antenna array, mm-wave sensing, free-space optics, fiber optics, optical true time-delay engine, wideband beam steering, and objective measures of eyestrain. She has authored one book and has published over 50 journal papers and conference articles.

Honors

  • 2016

    3rd Best Student Paper Award, IEEE International Symposium on Antennas and Propagation. .

  • 2016

    Elected Member of USNC-URSI Commission B. .

  • 2016

    2nd place, IEEE-AP/MTT Columbus Chapter Graduate Student Poster Competition. .

  • 2016

    Student Shubhendu Bhardwaj received Presidential Fellowship. .

  • 2016

    Student Shubhendu Bhardwaj received Louise B. Vetter Award. .

  • 2016

    OSA Senior Member. .

  • 2016

    Honorable Mention in Student Paper Competition, IEEE International Symposium on Antennas and Propagation. .

  • 2015

    1st place in Student Paper Competition, 37th Antenna Measurement Techniques Association (AMTA) Annual Meeting & Symposium. .

  • 2015

    Lumley Research Award from College of Engineering. .

  • 2014

    Honorable Mention in Student Paper Competition, IEEE International Symposium on Antennas and Propagation. .

  • 2014

    2nd place in Student Paper Competition, 36th Antenna Measurement Techniques Association (AMTA) Annual Meeting & Symposium. .

  • 2013

    Senior Member. .

  • 2006

    Alumni Grants for Graduate Research and Scholarship. .

  • 1997

    Appreciation Awards for Quality Control. .

Books

2009

  • Niru K. Nahar & Roberto G. Rojas. 2009. "Free Space Optical True Time Delay for Beam Steering: Design, Simulation and Characterizations." Berlin: M Verlag.

Journal Articles

2017

  • S. Bhardwaj; Niru K. Nahar; J. L. Volakis, 2017, "All Electronic Propagation Loss Measurement and Link Budget Analysis for 350 GHz Communication Link." Microwave and Optical Technology Letter 59, no. 2, 415 - 423.
  • Varittha Sanphuang; Niru K Nahar; John L. Volakis, 2017, "THz spatial filter employing bimaterial switching for temperature sensing." Microwave and Optical Technology Letters 59, no. 1, 168 - 171.

2016

  • M. Zuboraj, U. Chipengo; N. K. Nahar, and J. L. Volakis, 2016, "Experimental Validation of Slow-Wave Phenomena in Curved Ring-Bar Slow-Wave Structure." IEEE Transactions on Plasma Science 44, no. 9, 1794 - 1799.
  • U. Chipengo, N. K. Nahar, and J. L. Volakis, 2016, "Cold Test Validation of Novel Slow Wave Structure for High Power Band Backward Wave Oscillator." IEEE Trans. on Plasma Science 44, no. 6, 911 - 917.
  • Varittha Sanphuang, Nima Ghalichechian, Niru K. Nahar and John L. Volakis,, 2016, "Reconfigurable THz Filters Using Phase-Change Material and Integrated Heater." IEEE Transactions on THz Science and Technology 6, no. 4, 583 - 591.
  • Shubhendu Bhardwaj, Niru K. Nahar, Siddharth Rajan, John L. Volakis, 2016, "Numerical Analysis of Terahertz Emissions From an Ungated HEMT Using Full-Wave Hydrodynamic Model." IEEE Transactions on Electron Devices 63, no. 3, 990 - 996.

2015

  • S. Bhardwaj, N. K. Nahar, and J.L. Volakis, 2015, "Novel Phaseless Gain Characterization for Circularly Polarized Antennas at mm-wave and THz Frequencies." IEEE Trans. Antennas Propagat. 63, no. 10, 4263 - 4270.
  • U. Chipengo, M. Zuboraj, N. K. Nahar, and J. L. Volakis, 2015, "A Novel Slow-Wave Structure for High-Power Ka-Band Backward Wave Oscillators With Mode Control." IEEE Trans. on Plasma Science 43, no. 6, 1879 - 1886.
  • Woon-Gi Yeo and Niru K Nahar, 2015, "Characterization of a THz CW spectrometer pumped at 1550nm." Infrared Physics & Technology 71, 70 - 76.
  • Varittha Sanphuang, Nima Ghalichechian, Niru K. Nahar, John L. Volakis, 2015, "Equivalent Circuit for VO2 Phase Change Material (PCM) Film in Reconfigurable FSS." Applied Physics Letters 107, no. 25, 253106 -
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L, 2015, "Equivalent circuit for VO2 phase change material film in reconfigurable frequency selective surfaces." APPLIED PHYSICS LETTERS 107, no. 25, 253106 -
  • Varittha Sanphuang, Woon-Gi Yeo, John L Volakis, Niru K. Nahar, 2015, "THz Transparent Metamaterials for Enhanced Spectroscopic and Imaging Measurements." IEEE Transactions on Terahertz Science and Technology 5, no. 1, 177 - 123.
  • Sai N. Tenneti, Niru K. Nahar, and John L. Volakis, 2015, "Full-Wave Modeling of THz RTD-Gated GaN HEMTs." Infrared Physics & Technology 72, 221 - 228.
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L, 2015, "Bandwidth Reconfigurable THz Filter Employing Phase-Change Material." 2015 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING 1, 2289 - 2290.
  • Shubhendu Bhardwaj, Niru K. Nahar, John L. Volakis, 2015, "Radial line slot array antenna with vertical waveguide feed for F-band communication." IET Microwaves Antennas and Propagation 9, no. 3, 193 - 199.
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L, 2015, "Bandwidth Reconfigurable THz Filter Employing Phase-Change Material." 2015 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING 1, 2289 - 2290.

2014

  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L, 2014, "Numerical Modeling of Plasma Oscillations in 2D Electron Gas for THz HEMT Devices." IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON 2014) 1, 302 - 303.
  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L, 2014, "FREQUENCY SELECTIVE SURFACES FILTERS TO ENHANCE PERFORMANCE OF KA BAND APPLICATIONS." MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 56, no. 3, 563 - 568.
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L, 2014, "Reconfigurable THz Filters with Integrated Micro-Heater." 2014 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 565 - 566.
  • Tenneti,Sai; Nahar,Niru,K; Volakis,John,L, 2014, "Full-Wave Optimization of Nitride-Based Resonant-Tunneling Diodes for Terahertz Amplification." 2014 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 2016 - 2017.
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L, 2014, "Analysis and Design of High Electron Mobility Transistors for THz Signal Generation." 2014 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 77 - 78.
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L, 2014, "Phaseless Method of Gain Characterization for Circularly Polarized Antennas for mmWave and THz band." IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON 2014) 1, 304 - 305.
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L, 2014, "Phase-Change Material for Reconfigurability in THz Band." IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON 2014) 1, 319 - 320.

2013

  • Yeo,Woon-Gi; Nahar,Niru,K; Sertel,Kubilay, 2013, "Far-IR multiband dual-polarization perfect absorber for wide incident angles." MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 55, no. 3, 632 - 636.
  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L, 2013, "MEMS Tunable THz Filters for Sensing." 2013 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 1130 - 1131.
  • Yeo,Woon-Gi; Nahar,Niru,K; Sertel,Kubilay, 2013, "Phased Array Antenna with Integrated MEMS Phase Shifters for Ka-Band SATCOM." 2013 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 105 - 106.
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L, 2013, "A Concentric-Arrayed Radial Line Slot Array Antenna for THz Applications Optimized Using PSO Algorithm." 2013 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 1128 - 1129.
  • Tenneti,Sai; Nahar,Niru,K; Volakis,John,L, 2013, "Full-Wave Electromagnetic Modeling of Terahertz RTD-Gated HEMTs." 2013 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 1, 1136 - 1137.

2012

  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L, 2012, "Broadband THz Filters for THz Sensing Devices." PROCEEDINGS OF THE 2012 IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON) 1, 38 - 39.
  • Tenneti,Sai; Nahar,Niru,K; Volakis,John,L, 2012, "Increased Output Power 300 GHz Oscillator Based on Linear Superposition." PROCEEDINGS OF THE 2012 IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON) 1, 31 - 33.
  • Chung,J-Y; Nahar,N,K; Zhang,L; Bayram,Y; Sertel,K; Volakis,J,L, 2012, "Broadband radio frequency conductivity measurement technique for engineered composites." IET MICROWAVES ANTENNAS & PROPAGATION 6, no. 4, 371 - 376.
  • Gowrisankaran,Sowjanya; Nahar,Niru,K; Hayes,John,R; Sheedy,James,E, 2012, "Asthenopia and Blink Rate Under Visual and Cognitive Loads." OPTOMETRY AND VISION SCIENCE 89, no. 1, 97 - 104.

2011

  • Nahar,Niru,K; Chung,Jae-Young; Tzanidis,Ioannis; Sertel,Kubilay; Volakis,John,L, 2011, "OPTICALLY TRANSPARENT RF-EO APERTURE WITH 20:1 BANDWIDTH." MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 53, no. 8, 1863 - 1866.
  • Nahar,N,K; Raines,B; Rojas,R,G; Strojny,B, 2011, "Wideband antenna array beam steering with free-space optical true-time delay engine." IET MICROWAVES ANTENNAS & PROPAGATION 5, no. 6, 740 - 746.
  • Nahar,Niru,K; Rojas,Roberto,G, 2011, "Efficient Free-Space Coupling to LMA-PCF by Aberration Correction." IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY 1, no. 10, 1553 - 1557.
  • Nahar,Niru,K; Gowrisankaran,Sowjanya; Hayes,John,R; Sheedy,James,E, 2011, "Interactions of visual and cognitive stress." OPTOMETRY-JOURNAL OF THE AMERICAN OPTOMETRIC ASSOCIATION 82, no. 11, 689 - 696.

2009

  • Nahar,Niru,K; Rojas,Roberto,G, 2009, "Low-loss polynomial White cell optical true-time delay engine for wideband radio frequency array beam steering." APPLIED OPTICS 48, no. 20, 3921 - 3929.

2008

  • Nahar,Niru,K; Rojas,Roberto,G, 2008, "Coupling Loss From Free Space to Large Mode Area Photonic Crystal Fibers." JOURNAL OF LIGHTWAVE TECHNOLOGY 26, no. 21-24, 3669 - 3676.

2007

  • Nahar,Niru,K; Sheedy,James,E; Hayes,John; Tai,Yu-Chi, 2007, "Objective measurements of lower-level visual stress." OPTOMETRY AND VISION SCIENCE 84, no. 7, 620 - 629.

2003

  • R. Higgins, Niru K. Nahar, B. L. Anderson, 2003, "Design and demonstration of a switching engine for a Binary True Time Delay Device using a White cell." Journal of Applied Optics 42, no. 23, 4747 - 4757.

Unknown

  • Anas J. Abumunshar, Woon-Gi Yeo, Niru K. Nahar, Daniel J. Hyman and Kubilay Sertel, "Tightly Coupled Ka-Band Dipole Array Antenna with Integrated MEMS Phase Shifters." IEEE Transactions on Antennas and Propagation
  • W.-G Yeo, N. K. Nahar, and K. Sertel, "THz Spectroscopic Response and Imaging for Human Brain Tissue with Alzheimer’s disease." IEEE Transactions on Terahertz Science and Technology
  • W.-G. Yeo, N. K. Nahar, C. L. Hitchcock, S. Park, O. Gurel, and K. Sertel, "THz Pulsed Imaging for Cancer Assessment on Human Lung and Small Intestine Tissues." Physics in Medicine and Biology

Unknown

  • V. Sanphuang, N. K. Nahar and J. L. Volakis, "Reconfigurable THz Filter by Employing Bimaterial Actuators." Microwave and Optical Technology letters
  • Shubhendu Bhardwaj, Niru K. Nahar, Siddharth Rajan, John L. Volakis, "Numerical Analysis of Terahertz Emission from an Asymmetrically Biased un-gated HEMT." IEEE Transactions on THz Science and Technology

Presentations

  • "Eliminating Aberration in White Cell." 2001, Presented at Great Lakes Optics Symposium,
  • "Concentric Arrayed Radial Line slot Array Antenna for W-band, Optimized Using Particle Swarm Optimization." 2013, Presented at ElectroScience Lab-Consortium on Electromagnetics and Radio Frequency (ESL-CERF), Annual Meeting July, 2013, Columbus, US|USA
  • "Phase-Change Materials for Reconfigurable Terahertz Microsystems." 2014, Presented at 2014 OSU Materials Week, Columbus, US|USA
  • "Photonics & THz Research Activities at ElectroScience Laboratory." 2011, Presented at ElectroScience Lab-Consortium on Electromagnetics and Radio Frequency (ESL-CERF), Annual Meeting, 2011, Columbus, US|USA
  • "Relationship between vision stress and generalized body stress." 2009, Presented at Computer Display and Vision Conference, Forest Grove, OR,
  • "A Design Analysis of IR Transparent Ka Band Pass Filters Using FSS." 2011, Presented at ElectroScience Lab-Consortium on Electromagnetics and Radio Frequency (ESL-CERF), Annual Meeting,
  • "Beam Steering of Phased Array Antenna with Quadratic White Cell Optical True Time Delay Engine." 2006, Presented at Electromagnetic (EM) Range Consortium Annual Meeting, OSU, Columbus, OH,
  • "RF Array Beam Steering with Free-Space Optical True-Time Delay Engine." 2010, Presented at Electromagnetic (EM) Range Consortium Annual Meeting, Columbus, OH, August, 2010, Columbus, US|USA
  • "Ultra Wideband Transparent RF Aperture for Electro Optical Integration." 2010, Presented at Electromagnetic (EM) Range Consortium Annual Meeting, Columbus, OH, 2010,
  • "New Frontiers for Commercial Application of Terahertz." 2011, Presented at ElectroScience Lab-Consortium on Electromagnetics and Radio Frequency (ESL-CERF), Annual Meeting, Columbus, US|USA
  • "Novel Phaseless Method of Gain Characterization for Circularly Polarized Antennas for mmWave and THz band." 2014, Presented at ElectroScience Lab-Consortium on Electromagnetics and Radio Frequency (ESL-CERF), Annual Meeting July, 2014, Columbus, US|USA
  • "Micro-Structured Fibers as Delay Elements for Binary Cell." 2004, Presented at DARPA/Northrop Grumman Electronic Systems Project Review,
  • "Microsoft Corporation, Advanced Reading Technologies Group, Project Review." 2006, Presented at Microsoft Corporation, Advanced Reading Technologies Group,
  • "State of Research at ElectroScience Laboratory." 2012, Presented at Battelle Memorial Institute,
  • "Non-Paraxial Lens Design Systems for White Cell True Time Delay Engine." 2002, Presented at DARPA/Northrop Grumman Electronic Systems Project Review,
  • "RF and Optics Research at ElectroScience Laboratory." 2009, Presented at University of Dayton,
  • "Multispectral Sensing & Imaging: Integrated RF, THz and Optical Apertures." 2011, Presented at ElectroScience Laboratory,
  • "Conformal RF-EO Systems." 2014, Presented at AFRL, Project Kick-off meeting,
  • "Cost-Effective, Simple and Accurate CP Gain Measurement Method for sub-mm-wave and Terahertz Frequencies." 2016, Presented at CERF-ESL,
  • "A Novel Slow Wave Structure for mm-Wave Traveling Wave Tubes." 2016, Presented at CERF-ESL,
  • "THz Biosensor employing Phase-Change Materials." 2016, Presented at CERF-ESL,
  • "Broadband FarIR Polymer-supported Filter." 2016, Presented at CERF-ESL,
  • "Novel Concepts for Slow Wave Structures used in High Power Backward Wave Oscillators." 2016, Presented at CERF-ESL,

Papers in Proceedings

2017

  • Seckin Sahin; Cosan Caglayan; Niru K. Nahar; Kubilay Sertel "MONOLITHIC REALIZATION AND CHARACTERIZATION OF ON-CHIP UWB PHASED ARRAYS FOR MMW AND THZ CONNECTIVITY." in IEEE Radio Science Meeting (USNC-URSI NRSM). Boulder, (1 2017). 1 -
  • Ushemadzoro Chipengo; Niru K. Nahar; John L. Volakis "EXPERIMENTAL DEMONSTRATION OF HIGHER ORDER DISPERSION IN INHOMOGENEOUS SLOW WAVE STRUCTURES FOR BACKWARD WAVE OSCILLATORS." in IEEE Radio Science Meeting (USNC-URSI NRSM). Boulder, (1 2017). 1 -

2016

  • Varittha Sanphuang, , Niru K. Nahar and John L. Volakis "THz Spatial Filter with Bimaterial Switching." in IEEE Radio Science Meeting (USNC-URSI NRSM). Boulder, CO, (1 2016). 1 -
  • Anas J. Abumunshar, Niru K. Nahar, and Kubilay Sertel "K-to-Ka Band Low-profile Phased Array with Integrated MEMS Phase Shifters." in IEEE International Symposium on Antennas and Propagation/URSI. NY, (6 2016). 1 -
  • Shubhendu Bhardwaj, Niru Nahar, John Volakis "Phaseless Measurement Methods of CP Antennas at sub-mmWave and THz bands (invited)." in 10th European Conference on Antennas and Propagation. NY, (4 2016). 1 - 2.
  • Varittha Sanphuang, , Niru K. Nahar and John L. Volakis "THz Spatial Filter Integrating Bimaterial Switching for Sensors." in IEEE International Symposium on Antennas and Propagation/URSI. NY, (6 2016). 1 -
  • V. Sanphuang, N. Ghalichecian, N. K. Nahar and J. L. Volakis "Reconfigurable THz Array Employing Vanadium Dioxide." in IEEE Radio Science Meeting (USNC-URSI NRSM). Boulder, CO, (1 2016). 1 -
  • Shubhendu Bhardwaj; Niru K. Nahar; John L.Volakis "A Phaseless Gain and Pattern Characterization of CP Antennas in Sub-Mm-Wave and Terahertz Bands." in 2016 IEEE Conference on Antenna Measurements and Applications. New Jersey, (10 2016). 1 -
  • Anas J. Abumunshar, Niru K. Nahar, Daniel J. Hyman, Kubilay Sertel "18-40GHz Phased Array Antenna using Printed Circuit Board Fabrication and Surface-mount MEMS Phase Shifters." in IEEE Radio Science Meeting (USNC-URSI NRSM). Boulder, CO, (1 2016). 1 -
  • Seckin Sahin, Niru K. Nahar and Kubilay Sertel "Monolithic UWB Phased Arrays for mmW and THz Applications." in IEEE Radio Science Meeting (USNC-URSI NRSM). Boulder, CO, (1 2016). 1 -
  • U. Chipengo, N. K. Nahar and J. L. Volakis "Cold Test of Homogeneous and Inhomogeneous Slow Wave Structures for High Power Backward Wave Oscillators." in IEEE International Symposium on Antennas and Propagation/URSI. NY, (6 2016). 1 -
  • Varittha Sanphuang; Niru K. Nahar; John L. Volakis "THz Biosensor employing Phase-Change Materials." in IEEE NATIONAL AEROSPACE AND ELECTRONICS CONFERENCE (NAECON 2016). NY, (7 2016). 1 -
  • Ogan Gurel, Richard McKaya, Seong-hoon Jeong, Jaehun Park, Seong-Eon Ryu, Niru Nahar, Kubilay Sertel "Protein Electrodynamics & Terahertz Medicine: An Update." in 7th International THz-Bio Workshop 2016. Seoul, (6 2016). 1 -
  • Ushemadzoro Chipengo, Niru K. Nahar and John Volakis "Fabrication and Cold Testing of S Band Inhomogeneous Slow Wave Structure for Highly Efficient Backward Wave Oscillator." in 18th Annual Directed Energy Symposium. Albuquerque, New Mexico, (3 2016). 1 -
  • Shubhendu Bhardwaj, Niru Nahar, John Volakis "Accurate Low Cost Phaseless Measurement Method of CP Antennas at Millimeter Wave & Terahertz Bands." in IEEE International Symposium on Antennas and Propagation/URSI. NY, (6 2016). 1 -
  • Muhammed Zuboraj, Niru K. Nahar, and John L. Volakis "A Novel Slow Wave Structure for V-band Traveling Wave Tube." in IEEE International Symposium on Antennas and Propagation/URSI. NY, (6 2016). 1 -
  • S. Sahin, N. K. Nahar and K. Sertel "On-chip UWB Phased Arrays for mmW Connectivity." in IEEE International Symposium on Antennas & Propagation/URSI. NY, (6 2016). 1 -
  • Varittha Sanphuang, Niru K. Nahar, and John L. Volakis "Thermally-Controlled THz Biosensor employing Phase-Change Materials." in IEEE International Symposium on Antennas and Propagation/URSI. NY, (6 2016). 1 -

2015

  • Ogan Gurel, Woon-Gi Yeo, Niru K. Nahar, Norman L. Lehman, Sungchan Park, Kubilay Sertel "THz Spectroscopic Response of Brain Tissue Exhibiting Alzheimer’s Disease." JOURNAL: "IEEE International Symposium on Antennas and Propagation." in IEEE International Symposium on Antennas and Propagation. (7 2015). 1 -
  • Shubhendu Bhardwaj, Niru K Nahar, John Volakis "Propagation Loss Measurement in 300-350 GHz Band Communication Link." in 37th Antenna Measurement Techniques Association (AMTA) Annual Meeting & Symposium. Long Beach, (10 2015). 1 -
  • S. Sahin, N. Ghalichechian, N. K. Nahar, K. Sertel "Lithographically-fabricated Ultrawideband Phased-Arrays for Agile mmW Connectivity." JOURNAL: "IEEE International Symposium on Antennas and Propagation." in IEEE International Symposium on Antennas and Propagation. (7 2015). 1 -
  • Anas J. Abumunshar, Woon-Gi Yeo, Niru K. Nahar, Daniel J. Hyman, Kubilay Sertel "15-40GHz Tightly-Coupled Dipole Array with Integrated MEMS Phase Shifter." JOURNAL: "IEEE International Symposium on Antennas and Propagation." in IEEE International Symposium on Antennas and Propagation. (7 2015). 1 -
  • V. Sanphuang, N. Ghalichechian, N. K. Nahar, J. L. Volakis "Bandwidth Reconfigurable THz Filter Employing Phase-Change Material." in IEEE International Symposium on Antennas and Propagation. NY, (7 2015). 2289 - 2290.

2014

  • Muhammed Zuboraj, Niru K. Nahar, and John L. Volakis "A S-band High Power Traveling Wave Tube for RADAR application." in IEEE International Symposium on Antennas and Propagation. Memphis, (7 2014). 1 -
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L "Numerical Modeling of Plasma Oscillations in 2D Electron Gas for THz HEMT Devices." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2014). 302 - 303.
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L "Analysis and Design of High Electron Mobility Transistors for THz Signal Generation." in IEEE Antennas-and-Propagation-Society International Symposium (APSURSI). NEW YORK, (1 2014). 77 - 78.
  • Anas J. Abumunshar, Woon-Gi Yeo, Niru K. Nahar and Kubilay Sertel "Tightly Coupled Ka-Band Phased Array Antenna with Integrated MEMS Phase Shifters." in IEEE International Symposium on Antennas and Propagation. Memphis, (7 2014). 104 -
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L "Phase-Change Material for Reconfigurability in THz Band." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2014). 319 - 320.
  • Muhammed Zuboraj, NK Nahar, Kubilay Sertel, JL Volakis "High power microwave slow wave structure for relativistic beams." in Radio Science Meeting (USNC-URSI NRSM), 2014 United States National Committee of URSI National. Boulder, CO, (1 2014). 1 -
  • Varittha Sanphuang, Nima Ghalichechian, Niru K. Nahar, and John L. Volakis "Phase Change Materials for Reconfigurable Systems." in IEEE International Symposium on Antennas and Propagation. Memphis, (7 2014). 209 -
  • Tenneti,Sai; Nahar,Niru,K; Volakis,John,L "Full-Wave Optimization of Nitride-Based Resonant-Tunneling Diodes for Terahertz Amplification." in IEEE Antennas-and-Propagation-Society International Symposium (APSURSI). NEW YORK, (1 2014). 2016 - 2017.
  • Sanphuang,Varittha; Ghalichechian,Nima; Nahar,Niru,K; Volakis,John,L "Reconfigurable THz Filters with Integrated Micro-Heater." in IEEE Antennas-and-Propagation-Society International Symposium (APSURSI). NEW YORK, (1 2014). 565 - 566.
  • Shubhendu Bhardwaj, Niru K. Nahar and John L. Volakis "Fixed Frequency Slotted Waveguide Beam Reconfigurable Antenna for mmWave Application." in IEEE International Symposium on Antennas and Propagation. Memphis, (7 2014). 59 -
  • Sai N. Tenneti, Niru K. Nahar, and John L. Volakis "Full-Wave Optimization of Nitride-Based Resonant-Tunneling Diodes for Terahertz Amplification." Memphis, (7 2014). 2016 - 2017.
  • Varittha Sanphuang, Nima Ghalichechian, Niru K. Nahar, and John L. Volakis "Reconfigurable THz Filters with Integrated Micro-Heater." in IEEE International Symposium on Antennas and Propagation. Memphis, (7 2014). 565 - 566.
  • Sai N. Tenneti, Niru K. Nahar, and John L. Volakis "Modeling of RTD-Gated GaN HEMTs at Terahertz Frequencies Using a Full-Wave Simulation Toolset Coupled with Particle-Based Equations." in Radio Science Meeting (USNC-URSI NRSM). Boulder, (1 2014). 1 -
  • Woon-Gi Yeo, Ogan Gurel, Niru K. Nahar, Charles L. Hitchcock, N. L. Lehman, Sungchan Park, and Kubilay Sertel "THz Imaging of Alzheimer’s Disease: Spectroscopic Differentiation Between Normal and Diseased Tissues." in The 39th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). Tucson, (9 2014). 11 -
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L "Phaseless Method of Gain Characterization for Circularly Polarized Antennas for mmWave and THz band." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2014). 304 - 305.
  • Woon-Gi Yeo, Niru K. Nahar, and Kubilay Sertel "Terahertz-frequency Biomedical Imaging for Wound Management." in 6th Annaul Translation to Clinical (T2C) Regenerative Medicine Wound Care Conference. Columbus, (3 2014). 1 -
  • S. Bhardwaj, Niru K Nahar, J. L. Volakis "A Method of Phase-less Measurements for the Circularly Polarized Gain in the Sub-Millimeter Band." in Radio Science Meeting (USNC-URSI NRSM), 2014. Boulder, (1 2014). 1 -
  • Woon-Gi Yeo, Niru K. Nahar, Charles L. Hitchcock, Sungchan Park, Ogan Gurel, and Kubilay Sertel "THz Spectroscopy and Imaging of Major Human Organ Tissues for Cancer Margin Assessment." in IEEE International Symposium on Antennas and Propagation. Memphis, (7 2014). 255 -
  • Shubhendu Bhardwaj, Niru Nahar, John Volakis "Novel Phaseless Method of Gain Characterization for Circularly Polarized Antennas for mmWave and THz band." in 36th Antenna Measurement Techniques Association (AMTA) Annual Meeting & Symposium. Tucson, (10 2014). 1 -
  • Varittha Sanphuang, Nima Ghalichechian, Niru K. Nahar, and John L. Volakis "Phase Change Materials for Reconfigurability in THz Systems." in IEEE NAECON. Dayton, (6 2014). 1 -

2013

  • Tenneti,Sai; Nahar,Niru,K; Volakis,John,L "Full-Wave Electromagnetic Modeling of Terahertz RTD-Gated HEMTs." in International Symposium of the IEEE-Antennas-and-Propagation-Society. NEW YORK, (1 2013). 1136 - 1137.
  • Yeo,Woon-Gi; Nahar,Niru,K; Sertel,Kubilay "Ka-Band Phased Array Antenna with Integrated MEMS Phase Shifters." in US-National-Committee-of-URSI National Radio Science Meeting. NEW YORK, (1 2013). 1 -
  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L "MEMS Tunable THz Filters for Sensing." in International Symposium of the IEEE-Antennas-and-Propagation-Society. NEW YORK, (1 2013). 1130 - 1131.
  • Bhardwaj,Shubhendu; Nahar,Niru; Volakis,John,L "Link Budget Analysis for 350 GHz Communication Link." in US-National-Committee-of-URSI National Radio Science Meeting. Boulder, CO, (1 2013). 1 -
  • Woon-Gi Yeo, Georgios C. Trichopoulos, Niru K. Nahar, and Kubilay Sertel "Real-time Focal Plane Array THz Camera for Bio-Medical Imaging." in 4th International THz-Bio Workshop. Seoul, (2 2013). 1 -
  • Ogan Gurel, Woon-Gi Yeo, Niru K. Nahar, Charles L. Hitchcock, Sungchan Park, and Kubilay Sertel "Real-time THz Imaging of Human Tissue Characteristics and Cancer Margins." in The 38th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). Mainz, (9 2013). 1 -
  • Sai N. Tenneti, Niru K. Nahar, and John L. Volakis "Full-Wave Electromagnetic Modeling of Terahertz RTD-Gated HEMTs." in IEEE International Symposium on Antennas and Propagation. Lake Buena Vista, (7 2013). 1136 - 1137.
  • Yeo,Woon-Gi; Nahar,Niru,K; Sertel,Kubilay "Phased Array Antenna with Integrated MEMS Phase Shifters for Ka-Band SATCOM." in International Symposium of the IEEE-Antennas-and-Propagation-Society. NEW YORK, (1 2013). 105 - 106.
  • Bhardwaj,Shubhendu; Nahar,Niru,K; Volakis,John,L "A Concentric-Arrayed Radial Line Slot Array Antenna for THz Applications Optimized Using PSO Algorithm." in International Symposium of the IEEE-Antennas-and-Propagation-Society. NEW YORK, (1 2013). 1128 - 1129.

2012

  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L "Broadband THz Filters for THz Sensing Devices." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2012). 18 - 19.
  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L "Broadband THz Filters for THz Sensing Devices." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2012). 38 - 39.
  • Tenneti,Sai; Nahar,Niru,K; Volakis,John,L "Increased Output Power 300 GHz Oscillator Based on Linear Superposition." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2012). 31 - 33.
  • W-G Yeo, V Sanphuang, NK Nahar and JL Volakis "THz Periodic Surfaces to Enhance Spectroscopic Measurements." in Electromagnetics in Advanced Applications (ICEAA), 2012 International Conference on. Cape Town, (9 2012). 924 - 925.
  • Yeo,Woon-Gi; Nahar,Niru,K; Sertel,Kubilay "Dual-Band, Wide-Incident-Angle Absorber for Far-IR and THz Frequencies." in IEEE National Aerospace and Electronics Conference (NAECON). NEW YORK, (1 2012). 24 - 25.
  • J. Brown, M. McFarland, V. Sanphuang, N. K. Nahar and J. L. Volakis "Coating Designs for Tri-Mode Seeker Domes and Multimode Apertures." in 14th DoD Electromagnetic Windows Symposium, San Antonio, TX. San Antonio, (5 2012). 1 -
  • W-G Yeo, NK Nahar, R Lee, JL Volakis, and CL Hitchcock "Terahertz Characterization of Biological Tissues." in USNC- URSI. Boulder, (1 2012). 1 -
  • Yeo,Woon-Gi; Nahar,Niru,K; Volakis,John,L "Validation of CW THz Spectral Measurements." in IEEE International Symposium on Antennas and Propagation. NEW YORK, (1 2012). 3 -
  • Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L "Novel FSS filters in Ka band." in IEEE International Symposium on Antennas and Propagation. NEW YORK, (1 2012). 2 -
  • Yeo,Woon-Gi; Sanphuang,Varittha; Nahar,Niru,K; Volakis,John,L "THz Periodic Surfaces to Enhance Spectroscopic Measurements." in International Conference on Electromagnetics in Advanced Applications (ICEAA) / IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (IEEE APWC) / URSI Electromagnetic Environment and Interference Symposium (EEIS). NEW YORK, (1 2012). 924 - 925.

2011

  • Woon-Gi Yeo, Niru K. Nahar, Robert Lee and John L. Volakis "New Frontiers for Commercial Applications of Terahertz." in IEEE National Aerospace & Electronics Conference. Dayton, (6 2011). 5 - 8.
  • Woon-Gi Yeo and Niru K. Nahar "A Far Infrared Narrowband Detector using Frequency Selective Surfaces." in IEEE, APS/URSI Conference. Spokane, (7 2011). 1 -

2010

  • Nahar,N,K; Tzanidis,I,I; Sertel,K; Volakis,J,L "Ultra Wideband Transparent RF Aperture for Electro-Optical Integration." in 2010 IEEE International Symposium Antennas and Propagation/CNC-USNC/URSI Radio Science Meeting. NEW YORK, (1 2010). 4 -

2009

  • Niru K. Nahar, Bryan Raines, Brandan Strojny and Roberto G. Rojas "A Practical Approach to Beam Steering with White Cell True-Time Delay Engine." in IEEE, APS/URSI Conference. Charleston, (6 2009). 1 -
  • Niru K. Nahar, Sowjanya Gowrisankaran, John Hayes, James E. Sheedy "Blinking and squinting when reading: trade-off between cognitive and visual stress." in Computer Display and Vision Conference. Forest Grove, (6 2009). 1 -

2007

  • Niru K. Nahar, and R. G. Rojas "Beam Steering of Four Element RF Phased Array Antenna with White Cell Optical True Time Delay Engine." in Electromagnetic (EM) Range Consortium Annual Meeting. Columbus, (8 2007). 1 -
  • Sowjanya Gowrisankaran, Niru K. Nahar, James E. Sheedy, John Hayes "Visual and cognitive stress determines severity of near work induced asthenopia." in Academy 2007. Tampa, (10 2007). 1 -
  • Niru K. Nahar, Sowjanya Gowrisankaran, James E. Sheedy, John Hayes "Eyelid Squint Response to Visual and Cognitive Stress." in Academy 2007. Tampa, (10 2007). 1 -

2006

  • Niru K. Nahar, James E. Sheedy "Electromyography as an Objective measure of Visual Stress." in Academy 2006. Denver, (12 2006). 1 -

2005

  • Niru K. Nahar, Roberto G. Rojas "Free space coupling properties of large mode area Photonic Crystal Fibers." in IEEE, APS/URSI Conference. Washington DC, (7 2005). 1 -

2003

  • B. L. Anderson, S. A. Collins Jr., R. Mital, N. K. Nahar and B. R. Stone "The Octic White Cell True Time Delay Device." in Government Microcircuit applications and critical technology conference. Tampa, FL, (4 2003). 1 -

Unknown

  • Ushemadzoro Chipengo, Niru K. Nahar and John Volakis "Novel Concepts for Slow Wave Structures used in High Power Backward Wave Oscillators." in 19th Annual Directed Energy Symposium.
  • Anas J. Abumunshar; Niru K. Nahar;Kubilay Sertel "18-40GHz Low-profile Phased Array with Integrated MEMS Phase Shifters." in 11th European Conference on Antennas and Propagarion.