- 标题
- 摘要
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- 实验方案
- 产品
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[IEEE 2019 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD) - Udine, Italy (2019.9.4-2019.9.6)] 2019 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD) - Simulation of quantum dot based single-photon sources using the Schr?dinger-Poisson-Drift-Diffusion-Lindblad system
摘要： The device-scale simulation of electrically driven quantum light sources based on semiconductor quantum dots requires a combination of the (semi-)classical semiconductor device equations with cavity quantum electrodynamics. We present a comprehensive quantum-classical simulation approach that self-consistently couples the (semi-)classical drift-diffusion system to a Lindblad-type quantum master equation. This allows to describe the spatially resolved carrier transport in complex, multi-dimensional device geometries along with the fully quantum-mechanical light-matter interaction in the quantum dot-cavity system. The latter gives access to important quantum optical figures of merit, in particular the second-order correlation function of the emitted radiation. In order to account for the quantum confined Stark effect in the device’s internal electric field, the system is solved along with a Schr?dinger–Poisson problem, that describes the envelope wave functions and energy levels of the quantum dot carriers. The approach is demonstrated by numerical simulations of a single-photon emitting diode.
关键词： quantum-confined Stark effect,device simulation,Single-photon sources,quantum-classical coupling
更新于2025-09-12 10:27:22
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[IEEE 2019 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD) - Udine, Italy (2019.9.4-2019.9.6)] 2019 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD) - Hybrid Method For Electromagnetic Modelling of Coherent Radiation in Semiconductor Lasers
摘要： In this paper hybrid method for electromagnetic (EM) modelling of coherent radiation in semiconductor lasers is presented. Described approach consist of drift diffusion (DD) model and electromagnetic simulation. Four-level two-electron atomic system with Pauli Exclusion Principle (PEP) extended by electric pumping ratio has been used as lasing model.
关键词： ADE,drift diffusion,PEP,device,FDTD,simulation,nonlinear optics
更新于2025-09-12 10:27:22
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47.2: Lithography Simulation and OPC for Next Generation Display Technology
摘要： Lithography simulation and resolution enhancements techniques were a focal point in many conferences and publications in the last 20 years. Computational lithography has focused on the developments of advanced front-end IC manufacturing and consequently, not well suited for other non-IC applications. In this paper, we would like to focus on lithography simulation and OPC technology specifically for display manufacturing.
关键词： Lithography simulation,OPC for FPD,display manufacturing
更新于2025-09-12 10:27:22
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A New Ray Tracing Heat Source Model for Mesoscale CFD Simulation of Selective Laser Melting (SLM)
摘要： The present work was aimed to develop a new ray tracing heat source model used in mesoscale finite volume method (FVM) simulations for the selective laser melting (SLM) process. By means of the metal-gas interface built via the volume of fluid (VOF) method, the developed model simulated the interactions between the laser beam and the powder bed. Multiple reflections of the laser beam at the surface of the metal powders were taken into account in the modeling. Integrated into the commercial software, FLOW3D, the heat source model was validated by the comparison between the calculation results and previous experiments. 3-D mesoscale simulations for the SLM process of 316L stainless steel were performed. The result indicated that the proposed ray tracing heat source model was able to model the laser heating process of the SLM. Better than the conventional one, the new heat source model identified the local defects during the SLM process, such as the balling behavior.
关键词： Selective laser melting,Mesoscopic simulation,Ray tracing,Additive manufacturing
更新于2025-09-12 10:27:22
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Design, Simulation, and Economic Optimization of an Off-Grid Photovoltaic System for Rural Electrification
摘要： Access to clean and a?ordable energy in rural African regions can contribute greatly to social development. Hence, this article proposes the design, simulation, and optimization of a stand-alone photovoltaic system (SAPV) to provide non-polluting electrical energy based on a renewable source for a rural house located in Tazouta, Morocco. Real monthly electrical demands and hourly climatic conditions were utilized. An initial design process indicated that, with a 1080 Wp total capacity of PV modules and 670 Ah of battery storage, the proposed SAPV system was able to meet a considerable part of the dwelling load with an average solar fraction of about 79.1%. The rest of the energy demand was ensured by a diesel generator (DG). Also, a life cycle analysis of the PV system revealed that the life cycle cost is 10,195.56 USD and the unit electricity cost is 0.57 USD/kWh for an initial investment of 4858.68 USD. Thereafter, an optimum design based on Homer Pro software was carried out indicating that lower PV capacity can decrease the unit energy cost to 0.356 USD/kWh while reducing the solar fraction to 54.9%.
关键词： design,o?-grid,Morocco,photovoltaic,simulation,life cycle cost analysis,optimization
更新于2025-09-12 10:27:22
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[IEEE 2019 International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET) - Istanbul, Turkey (2019.8.26-2019.8.27)] 2019 International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET) - Simulation of Solar Cell Absorption Enhancement via Incorporation of Plasmonic Nanoparticles
摘要： Among the various technologies available for solar energy generation, photovoltaics has a unique advantage due to the ease of use, effectiveness and prevalent availability of solar energy. Solar cell efficiency is key to the widespread use of photovoltaic technology for power generation. Absorption of photons within the active media is one such pre requisite to increasing the optical generation rate and thus electron-hole generation. Plasmonics – the study and manipulation of coupled electron-photon oscillations – provides a gateway towards fulfilling this need. In this study, we make use of the inherent loss of localized surface plasmon resonance (LSPR) into the dielectric media. To demonstrate this, we evaluate the increase in optical absorption as a function of nanoparticle radius in a silver nanosphere lattice. Discussion is presented on the role of the electric field and on the underlying mechanisms.
关键词： Photovoltaics,Finite-difference,Nanotechnology,Absorption enhancement,Plasmonics,Time domain simulation,Localized surface plasmon resonance
更新于2025-09-12 10:27:22
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Numerical investigation of wind influences on photovoltaic arrays mounted on roof
摘要： The wind-induced response of photovoltaic (PV) panel installed on building roof is influenced by the turbulence induced by the pattern of both panels and roofs. Different roof types cause different flow patterns around PV panels, thus change the flow mechanism exerted on PV panels. In this study, the effects of roof types, heights and the PV array layouts on the net wind loads of the PV panel is investigated. The software Fluent is adopted and the three-dimensional Reynolds-averaged Navier–Stokes (RANS) method is used for numerical analysis. The rationality and accuracy of the numerical results obtained from the current study are verified through comparison with the results of wind tunnel experiments. The maximum wind uplift on the PV panels increases with the panel tilt angle for two types of roofs, but decreases with the increase of the PV array edge setback. Moreover, the maximum wind uplift also increases with the roof clearance within a certain range. Both the row spacing of PV array and the building height have a great effect on the maximum aerodynamic uplift for gable roofs, whereas both of them have slight influence for flat roofs.
关键词： Roof photovoltaic array,roof type,wind pressure coefficient,Reynolds-averaged Navier–Stokes simulation,edge setback,PV panel tilt angle
更新于2025-09-12 10:27:22
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Relationships between design parameters of see-through thin film photovoltaic facade and energy performance of office building in China cold zone
摘要： See-through thin film photovoltaic is a substitute for traditional glass in building facade. Three design parameters of photovoltaic facade have the vast influence on the overall energy performance of building. They are orientation, visible light transmittance and comprehensive heat transfer coefficient. In this study, six photovoltaic facades were established by using two kinds of thin film photovoltaic materials with different transmittances, followed by conducting the simulations of ultimate energy consumptions, in five orientations, of the offices located in Tianjin city which belongs to China cold zone. Then, according to the energy consumption of the reference office, the energy-saving rates of offices with photovoltaic facades are calculated. Finally, the sensitivity of each design parameter to the energy-saving rate of buildings is analyzed. The results indicate that when building photovoltaic fa?ade faces south, the highest energy-saving rate is up to 61.22%, and the lowest energy-saving rate is only 13.7% when the PVF looks east. The energy-saving rate of the room is most sensitive to the orientation, and the sensitivity of the three design parameters changes as the orientation changes. When the photovoltaic facade faces south, according to the sensitivity of the parameters from high to low, the order should be orientation, the comprehensive heat transfer coefficient and the visible light transmittance.
关键词： building energy performance,see-through thin film photovoltaic fa?ade,sensitivity analysis,numerical simulation
更新于2025-09-12 10:27:22
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Simulation of fragmental rockfalls detected using terrestrial laser scans from rock slopes in south-central British Columbia, Canada
摘要： Rockfall presents an ongoing challenge to the safe operation of transportation infrastructure, creating hazardous conditions which can result in damage to roads and railways, as well as loss of life. Rockfall risk assessment frameworks often involve the determination of rockfall runout in an attempt to understand the likelihood that rockfall debris will reach an element at risk. Rockfall modelling programs which simulate the trajectory of rockfall material are one method commonly used to assess potential runout. This study aims to demonstrate the effectiveness of a rockfall simulation prototype which uses the Unity 3D game engine. The technique is capable of simulating rockfall events comprised of many mobile fragments, a limitation of many industry standard rockfall modelling programs. Five fragmental rockfalls were simulated using the technique, with slope and rockfall geometries constructed from high-resolution terrestrial laser scans. Simulated change detection was produced for each of the events and compared to the actual change detection results for each rockfall as a basis for testing model performance. In each case the simulated change detection results aligned well with the actual observed change in terms of location and magnitude. An example of how the technique could be used to support the design of rockfall catchment ditches is shown. Suggestions are made for future development of the simulation technique with a focus on better informing simulated rockfall fragment size and the timing of fragmentation.
关键词： rockfall,simulation,Unity 3D,fragmentation,terrestrial laser scanning
更新于2025-09-12 10:27:22
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Numerical investigation of Transient Temperature Field on the Selective Laser Melting process with Al6063
摘要： The finite element simulation of the selective laser melting process with Al6063 metal powder was carried out by using ABAQUS. The loading of the laser Gaussian moving heat source is realized, and a model of the three-dimensional transient temperature field is established. The effects of scanning speed and scanning pitch on temperature distribution and temperature changes on different scanning channels were investigated. The simulation results show that due to the heat accumulation effect and heat conduction, the previous scan will have effect on the surrounding powder, which results the rise of temperature. Different scanning speed and the scanning pitch have influence on the temperature distribution. As the scanning speed increases, the temperature gradually decreases, and the increase in the scanning pitch also lead to lower temperature of the powder layer.
关键词： Finite Element Simulation,Transient Temperature Field,ABAQUS,Selective Laser Melting,Al6063
更新于2025-09-12 10:27:22