Articles techniques et présentations

Material constants are required to develop new materials for the aerospace, automotive and energy industries. With these highly accurate experimentally determined data, complex metallurgical melting processes can be simulated later, for example. The microstructure of the new alloy can be ... En savoir plus

High Voltage Electronic Transformers operate at high frequency, typically in a range of tens-to-hundreds of kHz. Knowing and tuning their parasitic parameters is an important aspect at the design phase. Although a vast amount of analytical means is available for calculating parasitics, ... En savoir plus

In this contribution, we simulate the optical response of piezoelectric planar optical microcavities (POMCs) under the modulation introduced by a propagating surface acoustic wave (SAW). The physical picture of the model is shown in Figure 1. A metallic interdigital transducer (IDT) is ... En savoir plus

Plasmonic nanoparticles have received increased interest due to their numerous potential applications in the field of optics and optoelectronics. Currently such metallic nanoparticles are applied in semiconductor devices, such as light emitting diodes (LEDs) and solar cells. The optical ... En savoir plus

随着电磁波应用功率的提高，大功率环形器的电磁损耗不可忽视，并造成环形器在工作过程中发生温度变化，导致环形器性能出现不稳定状态。针对大功率环形器在工作过程中温度变化对性能的影响，利用COMSOL Multiphysics多物理场耦合仿真软件，对大功率微波环形器进行3D建模，并在该模型基础上，对电磁场、固体传热和固体力学进行多物理场之间的耦合仿真，最终得到大功率微波环形器在工作过程中的电磁分布情况、损耗情况、温度分布情况以及结构参数等发生的一系列变化，并进一步考虑风冷及饱和磁化强度参数对大功率微波环形器性能的影响，为大功率环形器的综合设计提供理论依据。 En savoir plus

Transition metamaterials constitute a new class of engineered materials which have material properties tailored in such a manner that the refractive index gradually changes from positive to negative. An important question is what happens at the interface of a positive and negative index ... En savoir plus

Customers typically prepare sandwiches using a microwave oven to heat a frozen sandwich. This causes huge temperature variations and quality issues due to multicomponent with different dielectric and physical properties and with phase changes at different freezing points in the heating ... En savoir plus

This paper presents the electromagnetic analysis of an all-superconducting synchronous electric machine, focusing on AC loss calculations in high temperature superconducting (HTS) coils. The numerical analyses of two 3D models are shown, including the model of the machine and its HTS ... En savoir plus

Localized convection heat and mass transfer can be intensified and optimized by providing exposure to electromagnetic energy. Conjugate heat and mass transfer are configured by solving the momentum, heat and mass transfer simultaneously in both solid (substrate, comprising of a two-phase ... En savoir plus

In recent years, with the rise of quantum optical technologies, there has been a spurring research interest growing on single-photon emitters (SPE). To date, the focus in engineering improved SPE has been mainly towards better enhancement overlooking the tenuous manufacturing process ... En savoir plus