Search Results - "Dhar, Nibir"

Graphene-Based Field-Effect Photodetector with HgCdTe Absorber by Sheremet, Volodymyr, Rabbe, Md Fazle, Jacobs, Randy N., Avrutin, Vitaliy, Ӧzgür, Ümit, Dhar, Nibir K.

“…A field-effect photodetector structure composed of an Al 2 O 3 -encapsulated bilayer graphene conductive channel attached to an Al 2 O 3 dielectric layer…”
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Resonant InGaAs Detectors and Emitters for Passive and Active Imaging Application by Choi, Kwong-Kit, Oduor, Patrick, Dhar, Nibir K., Dutta, Achyut K.

“…In this work, we design an InGaAs avalanche photodiode (APD) with a higher photocurrent to dark current ratio than a conventional APD. The improvement is based…”
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High Performance Infrared Photodetectors and Energy Harvesting Devices Based on Micro-Scaled Photonics Structures by Choi, Kwong-Kit, Dutta, Achyut K., Dhar, Nibir K.

“…For mid-wave infrared detectors, we designed a meta-surface to enhance quantum efficiency (QE) across 2 to 6 microns. The relative enhancement depends on the…”
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A Perspective on Nanowire Photodetectors: Current Status, Future Challenges, and Opportunities by VJ, Logeeswaran, Oh, Jinyong, Nayak, Avinash P., Katzenmeyer, Aaron M., Gilchrist, Kristin H., Grego, Sonia, Kobayashi, Nobuhiko P., Wang, Shih-Yuan, Talin, A. Alec, Dhar, Nibir K., Islam, M. Saif

“…One-dimensional semiconductor nanostructures (nanowires (NWs), nanotubes, nanopillars, nanorods, etc.) based photodetectors (PDs) have been gaining traction in…”
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Uniform and Reliable GaN p-i-n Ultraviolet Avalanche Photodiode Arrays by Mi-Hee Ji, Jeomoh Kim, Detchprohm, Theeradetch, Dupuis, Russell D., Sood, Ashok K., Dhar, Nibir K., Lewis, Jay

“…GaN p-i-n ultraviolet avalanche photodiodes (UV-APDs) were fabricated from epitaxial structures grown on low-dislocation-density free-standing GaN substrates…”
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Using Skeleton Correction to Improve Flash Lidar-based Gait Recognition by Sadeghzadehyazdi, Nasrin, Batabyal, Tamal, Glandon, Alexander, Dhar, Nibir, Familoni, Babajide, Iftekharuddin, Khan, Acton, Scott T.

“…This paper presents GlidarPoly, an efficacious pipeline of 3D gait recognition for flash lidar data based on pose estimation and robust correction of erroneous…”
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Electrical Properties of Degenerate Boron Doped Graphene by Rabbe, Md Fazle, Sheremet, Volodymyr, Ganguly, Samiran, Sood, Ashok K., Zeller, John W., Chaudhary, Latika S., Avrutin, Vitaliy, Ozgur, Umit, Dhar, Nibir K.

“…P-type doping is essential for tuning the electron transport characteristics of graphene for variety of applications in electronics. We demonstrate stable…”
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Carbon nanotube microbolometers on suspended silicon nitride via vertical fabrication procedure by Fernandes, Gustavo E., Ho Kim, Jin, Chin, Matthew, Dhar, Nibir, Xu, Jimmy

“…We report on carbon nanotube membrane microbolometers, operating uncooled in the near-infrared (IR) and mid-IR band, with speed of 10 ms and responsivity of…”
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Development and fabrication of extended short wavelength infrared HgCdTe sensors grown on CdTe/Si substrates by molecular beam epitaxy by Simingalam, Sina, VanMil, Brenda L., Chen, Yuanping, DeCuir, Eric A., Meissner, Greg P., Wijewarnasuriya, Priyalal, Dhar, Nibir K., Rao, Mulpuri V.

“…•Short-wavelength infrared HgCdTe devices grown on CdTe/Si substrates have been demonstrated.•Data suggests diffusion current dominates near zero bias for…”
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Atomically thin layers of B-N-C-O with tunable composition by Ozturk, Birol, de-Luna-Bugallo, Andres, Panaitescu, Eugen, Chiaramonti, Ann N, Liu, Fangze, Vargas, Anthony, Jiang, Xueping, Kharche, Neerav, Yavuzcetin, Ozgur, Alnaji, Majed, Ford, Matthew J, Lok, Jay, Zhao, Yongyi, King, Nicholas, Dhar, Nibir K, Dubey, Madan, Nayak, Saroj K, Sridhar, Srinivas, Kar, Swastik

“…In recent times, atomically thin alloys of boron, nitrogen, and carbon have generated significant excitement as a composition-tunable two-dimensional (2D)…”
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Glidar3DJ: a View-Invariant Gait Identification via Flash Lidar Data Correction by Sadeghzadehyazdi, Nasrin, Batabyal, Tamal, Glandon, A., Dhar, Nibir K., Familoni, B. O., Iftekharuddin, K. M., Acton, Scott T.

“…Gait recognition is a leading remote-based identification method, suitable for real-world surveillance and medical applications. Model-based gait recognition…”
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Simulation of Indirect-Direct transformation phenomenon of germanium under uniaxial and biaxial strain along arbitrary orientations by Xiao, Ziyang, Goldsman, Neil, Dhar, Nibir K.

“…Germanium can be transformed from an indirect bandgap material to a direct bandgap material by applying strain. Unstrained Ge has an indirect bandgap of 0.66eV…”
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Hg based II-VI compounds on non-standard substrates by Brill, Gregory N., Chen, Yuanping, Wijewarnasuriya, Priyalal S., Dhar, Nibir K.

“…The Army Research Laboratory (ARL) is pursuing scalable infrared (IR) material technologies to meet the growing need for large format arrays. A two pronged…”
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High-Performance Long-Wavelength Infrared HgCdTe Focal Plane Arrays Fabricated on CdSeTe Compliant Si Substrates by Wijewarnasuriya, P.S., Yuanping Chen, Brill, G., Zandi, B., Dhar, N.K.

“…At the U.S. Army Research Laboratory, a new ternary semiconductor system CdSe x Te 1-x ,/Si(211) is being investigated as an alternative substrate to…”
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Using density functional theory to engineer direct gap germanium-tin alloy by Darmody, Chris, Ettisserry, D. P., Goldsman, Neil, Dhar, Nibir K.

“…Germanium is a group IV semiconductor commonly used in Short Wave Infrared (SWIR) optical devices due to its relatively small band gap of 0.66eV. Like silicon…”
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Simulation of Indirect-Direct transformation phenomenon of germanium under uniaxial and biaxial strain along arbitrary orientations by Ziyang Xiao, Goldsman, Neil, Dhar, Nibir K.

“…Germanium can be transformed from an indirect bandgap material to a direct bandgap material by applying strain. Unstrained Ge has an indirect bandgap of 0.66eV…”
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P-doped bilayer graphene based photodetector with colloidal quantum dots absorber by Rabbe, Md Fazle, Sheremet, Volodymyr, Pate, David, Avrutin, Vitaliy, Ozgur, Umit, Dhar, Nibir K.

“…Photodetector based on chemical free p-type doped graphene conduction channel and core-shell CdSe/ZnS type I quantum dots absorber was studied. Chanel…”
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Graphene Based Field Effect Transistor with Chemical Free p-Type Channel Doping by Sheremet, Volodymyr, Rabbe, Md Fazle, Avrutin, Vitaliy, Ozgur, Umit, Dhar, Nibir K.

“…This paper reports transport properties for \text{Al}_2 \mathbf{O}_3 and \text{SiO}_{2} encapsulated graphene bilayer with strain defined sheet carrier density…”
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Nonequilibrium Operation of Arsenic Diffused Long-Wavelength Infrared HgCdTe Photodiodes by Wijewarnasuriya, Priyalal S., Emelie, P.Y., D’Souza, Arvind, Brill, Gregory, Stapelbroek, Maryn G., Velicu, Silviu, Chen, Yuanping, Grein, Chris, Sivananthan, Sivalingam, Dhar, Nibir K.

“…We demonstrated a device with a unique planar architecture using a novel approach for obtaining low arsenic doping concentrations in long-wavelength (LW)…”
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Dissipative Quantum Transport Study of A Bi-Layer Graphene-CdTe-HgCdTe Heterostructure for MWIR Photodetector by Ganguly, Samiran, Tonni, Farjana F., Ahmed, Sheikh Z., Ghuman, Parminder, Babu, Sachidananda, Dhar, Nibir K., Sood, Ashok K., Ghosh, Avik W.

“…Recent experimental investigations in Bi-Layer Graphene (BLG) have shown interesting and useful electrical behavior that can be leveraged in building novel…”
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