Engineering topics
Wang, C.
Publications and source records attributed to Wang, C..
Extended mode in blocked impurity band detectors for terahertz radiation detection
We demonstrate the existence of an interfacial barrier in blocked impurity band (BIB) detectors using temperature-dependent dark current and corresponding theoretical calculations. Considering the effects of the interfacial barrier, the calculated photoresponse is in good agreement with the experimental results. A dual-excitation model, including the direct excitation over the full barrier and excitation to the band minimum with subsequent tunneling into the blocking layer, is proposed to quantitatively explain the observed photoresponse extension. A concept of extended-mode detection is developed to suggest the option for some selective photoresponse in the terahertz region and open the possibility of extending BIB photoresponse to lower frequency.
Unified Calculation of Eigen-Solutions in Power Systems Based on Matrix Perturbation Theory
Abstract not provided
Multi-metastable states induced by the optical pump-probe process in terahertz quantum cascade lasers
The optical pump-probe process in terahertz quantum cascade lasers is studied theoretically by using the open system simulation method. The emitter injection is considered and the charge neutrality in the active region is broken. We find that nonequilibrium oscillations may appear in the recovery processes. In particular, the formation of different equilibrium values of the population change after the periodic pulse pumping is observed clearly. Here, the phenomenon of multi-metastable states stems from the electron regulation by the emitter injection. Finally, we discuss the important impacts of the equilibrium stabilization time and obtain an in-depth understanding of the emitter injection.
Design of I2-II-IV-VI4 Semiconductors through Element Substitution: The Thermodynamic Stability Limit and Chemical Trend
Abstract not provided
Tuning the electrochemical performances of anthraquinone organic cathode materials for Li-ion batteries through the sulfonic sodium functional group
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Optimal tunneling enhances the quantum photovoltaic effect in double quantum dots
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Mechanism of the C5 Stereoinversion Reaction in the Biosynthesis of Carbapenem Antibiotics
Abstract not provided
Linking morphology and performance of organic solar cells based on decacyclene triimide acceptors
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Demonstration of an Electrochemical Liquid Cell for Operando Transmission Electron Microscopy Observation of the Lithiation/Delithiation Behavior of Si Nanowire Battery Anodes
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Crystal Settling, Redox, and High Temperature Properties of ORP HLW and LAW Glasses (Final Report)
The radioactive tank waste treatment programs at the U. S. Department of Energy (DOE) have featured joule heated ceramic melter technology for the vitrification of high level waste (HLW). The Hanford Tank Waste Treatment and Immobilization Plant (WTP) employs this same basic technology not only for the vitrification of HLW streams but also for the vitrification of Low Activity Waste (LAW) streams. Because of the much greater throughput rates required of the WTP as compared to the vitrification facilities at the West Valley Demonstration Project (WVDP) or the Defense Waste Processing Facility (DWPF), the WTP employs advanced joule heated melters with forced mixing of the glass pool (bubblers) to improve heat and mass transport and increase melting rates.
Insights into the Phase Formation Mechanism of [0.5Li 2 MnO 3 •0.5LiNi 0.5 Mn 0.5 O 2 ] Battery Materials
The cathode material Li 1.5 Ni 0.25 Mn 0.75 O 2.5 was synthesized through a solid-state reaction. In-situ high energy X-ray diffraction, STEM and electrochemical characterizations confirmed the composite nature of the material. We mainly found that the layered components belonging to the R3m and C2/m like-phases formed stepwise following the thermal decomposition and reaction of Li 2 CO 3 . Solid diffusion at high-temperature with extended calcination times cannot change the composite nature.