Search Results - "O'Hara, John F"

Controllable broadband asymmetric transmission of terahertz wave based on Dirac semimetals by Dai, Linlin, Zhang, Yuping, O'Hara, John F, Zhang, Huiyun

“…We present a dynamic metamaterial based on Dirac semimetals and capable of realizing broadband and tunable asymmetric transmission in the terahertz region. The…”
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Compensating Atmospheric Channel Dispersion for Terahertz Wireless Communication by Strecker, Karl, Ekin, Sabit, O’Hara, John F.

“…We report and demonstrate for the first time a method to compensate atmospheric group velocity dispersion of terahertz pulses. In ultra-wideband or impulse…”
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A Review on Thin-film Sensing with Terahertz Waves by O’Hara, John F., Withayachumnankul, Withawat, Al-Naib, Ibraheem

“…In the past two decades, the development and steady improvement of terahertz technology has motivated a wide range of scientific studies designed to discover…”
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Limitation in thin-film sensing with transmission-mode terahertz time-domain spectroscopy by Withayachumnankul, Withawat, O'Hara, John F, Cao, Wei, Al-Naib, Ibraheem, Zhang, Weili

“…Thin-film sensing with a film thickness much less than a wavelength is an important challenge in conventional transmission-mode terahertz time-domain…”
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Remote N2O gas sensing by enhanced 910-m propagation of THz pulses by Kim, Gyeong-Ryul, Moon, Kiwon, Park, Kyung Hyun, O'Hara, John F, Grischkowsky, D, Jeon, Tae-In

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A broadband planar terahertz metamaterial with nested structure by Chowdhury, Dibakar Roy, Singh, Ranjan, Reiten, Matthew, Chen, Hou-Tong, Taylor, Antoinette J, O'Hara, John F, Azad, Abul K

“…We demonstrate the broadening of fundamental resonance in terahertz metamaterial by successive insertion of metal rings in the original unit cell of a split…”
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Orthogonally twisted planar concentric split ring resonators towards strong near field coupled terahertz metamaterials by Chowdhury, Dibakar Roy, O'Hara, John F., Taylor, Antoinette J., Azad, Abul K.

“…We present strongly coupled planar terahertz metamaterials in which the metamolecule design comprised two concentric split ring resonators (SRRs) with their…”
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Electronic control of extraordinary terahertz transmission through subwavelength metal hole arrays by Chen, Hou-Tong, Lu, Hong, Azad, Abul K, Averitt, Richard D, Gossard, Arthur C, Trugman, Stuart A, O'Hara, John F, Taylor, Antoinette J

“…We describe the electronic control of extraordinary terahertz transmission through subwavelength metal hole arrays fabricated on doped semiconductor…”
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Low Strength Magnetic Fields Serve as a Cue for Foraging Honey Bees but Prior Experience is More Indicative of Choice by Chicas‐Mosier, Ana M., Radi, Medhat, Lafferrandre, Jack, O'Hara, John F., Vora, Hitesh D., Abramson, Charles I.

“…Species of migrating insects use magnetic fields as a navigational tool that is independent of current weather conditions and non‐migrating species have been…”
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Soil Moisture Monitoring through UAS-Assisted Internet of Things LoRaWAN Wireless Underground Sensors by Hossain, Fahim Ferdous, Messenger, Russ, Levi Captain, G., Ekin, Sabit, Jacob, Jamey D., Taghvaeian, Saleh, O'Hara, John F.

“…With growing usage and demand for the global freshwater supply, there is an increasing need for technologies that facilitate water conservation and…”
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An approach for mechanically tunable, dynamic terahertz bandstop filters by Li, Quan, Zhang, Xueqian, Cao, Wei, Lakhtakia, Akhlesh, O’Hara, John F., Han, Jiaguang, Zhang, Weili

“…Theoretical and experimental work was carried out on a terahertz metamaterial bandstop filter comprising an array of identical subwavelength resonators, each…”
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Experimental demonstration of frequency-agile terahertz metamaterials by Chen, Hou-Tong, O'Hara, John F, Azad, Abul K, Taylor, Antoinette J, Averitt, Richard D, Shrekenhamer, David B, Padilla, Willie J

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TV White Space Based Wireless Broadband Internet Connectivity: A Case Study With Implementation Details and Performance Analysis by Islam, Md Zobaer, O'Hara, John F., Shadoan, Dylan, Ibrahim, Mostafa, Ekin, Sabit

“…Even at the current age of sophisticated communication systems, remote rural communities with low user density throughout the world lack broadband Internet…”
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Raman Spectroscopy to Monitor Post-Translational Modifications and Degradation in Monoclonal Antibody Therapeutics by McAvan, Bethan S, Bowsher, Leo A, Powell, Thomas, O’Hara, John F, Spitali, Mariangela, Goodacre, Royston, Doig, Andrew J

“…Monoclonal antibodies (mAbs) represent a rapidly expanding market for biotherapeutics. Structural changes in the mAb can lead to unwanted immunogenicity,…”
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Fundamental Performance Limits on Terahertz Wireless Links Imposed by Group Velocity Dispersion by Strecker, Karl, Ekin, Sabit, O'Hara, John F.

“…A theoretical framework and numerical simulations quantifying the impact of atmospheric group velocity dispersion (GVD) on wireless terahertz communication…”
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Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations by O'Hara, John F, Singh, Ranjan, Brener, Igal, Smirnova, Evgenya, Han, Jiaguang, Taylor, Antoinette J, Zhang, Weili

“…The limiting effects of varying the thickness of a dielectric overlayer on planar double split-ring resonator (SRR) arrays are studied by terahertz time-domain…”
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Noncontact Respiratory Anomaly Detection Using Infrared Light-Wave Sensing by Islam, Md Zobaer, Martin, Brenden, Gotcher, Carly, Martinez, Tyler, O'Hara, John F., Ekin, Sabit

“…Human respiratory rate and its pattern convey essential information about the physical and psychological states of the subject. Abnormal breathing can indicate…”
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Independently tunable dual-band perfect absorber based on graphene at mid-infrared frequencies by Zhang, Yuping, Li, Tongtong, Chen, Qi, Zhang, Huiyun, O’Hara, John F., Abele, Ethan, Taylor, Antoinette J., Chen, Hou-Tong, Azad, Abul K.

“…We design a dual-band absorber formed by combining two cross-shaped metallic resonators of different sizes within a super-unit-cell arranged in mirror…”
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Artificial dielectric beam-scanning prism for the terahertz region by Strecker, Karl, Otto, Matthew, Nagai, Masaya, O’Hara, John F., Mendis, Rajind

“…We design and fabricate an artificial dielectric prism that can steer a terahertz beam in space and experimentally investigate its behavior. The artificial…”
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Experimental demonstration of frequency-agile terahertz metamaterials by Chen, Hou-Tong, O'Hara, John F., Azad, Abul K., Taylor, Antoinette J., Averitt, Richard D., Shrekenhamer, David B., Padilla, Willie J.

“…Metamaterials exhibit numerous novel effects 1 , 2 , 3 , 4 , 5 and operate over a large portion of the electromagnetic spectrum 6 , 7 , 8 , 9 , 10 …”
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