电磁场时空分布及其逻辑处理

电磁场模式逻辑

Logic for electromagnetic field patterns

我们认为，大脑皮层是一个线性的、模拟的、主动的系统，这种类数字的时空活动可能是由模式的非拓扑变换引起的。这种效应可以用拓扑调制的时空电磁信号来模拟，本文提出了拓扑调制的时空电磁信号理论。的逻辑操作被执行的被动组件，并认为他们的理论。模拟了两个这样的门。对这种类型的空间数字处理和计算的半导体硬件的一个简短的评论。

Spatio-temporal analysis of electromagnetic field coherence in complex media

We study the coherence in time and space of electromagnetic fields propagated through complex media. Whether for localization, imaging or telecommunication, the development of dedicated numerical techniques is generally based on the exploitation of simplified models considering either coherent or diffuse fields. The optimization of such applications in conditions of partial coherence can therefore be particularly challenging, requiring the development of hybrid algorithms adaptable to prior knowledge on the processed fields. The objective of this work is to provide numerical techniques for dec…

RaDiO: an efficient spatiotemporal radiation diagnostic for particle-in-cell codes

This work describes a novel radiation algorithm designed to capture the three-dimensional, space-time resolved electromagnetic field structure emitted by large ensembles of charged particles. % in particle-in-cell (PIC) codes. The algorithm retains the full set of degrees of freedom that characterize electromagnetic waves by employing the Liénard-Wiechert fields to retrieve radiation emission. Emitted electric and magnetic fields are deposited in a virtual detector using a temporal interpolation scheme. This feature is essential to accurately predict field amplitudes and preserve the continuou…

Modelling spatio-temporal dynamics of chiral coupling of quantum emitters to light fields in nanophotonic structures

A quantum emitter placed in a nanophotonic structure can result in non-reciprocal phenomena like chiral light excitation. Here, we present a theoretical model to couple circularly polarized emitters described by the density matrix formalism to the electromagnetic fields within a finite-difference time-domain (FDTD) simulation. In particular, we discuss how to implement complex electric fields in the simulation to make use of the rotating wave approximation. By applying our model to a quantum emitter in a dielectric waveguide and an optical circulator, we show how the excitation of the quantum …

光波导中脉冲信号的时空相干成形与检索

Spatio-temporal coherent molding and retrieval of pulsed signals in optical waveguides

该研究针对耦合波导阵列中短脉冲相位混合导致的编码输入态难以检索的问题，提出基于局部相移的检索方案，经三维全波电磁模拟验证其高保真度，可用于超快相干编解码。

Efficient retrieval of phase information from real-valued electromagnetic field data

While analytic calculations may give access to complex-valued electromagnetic field data which allow trivial access to envelope and phase information, the majority of numeric codes uses a real-valued represantation. This typically increases the performance and reduces the memory footprint, albeit at a price: In the real-valued case it is much more difficult to extract envelope and phase information, even more so if counter propagating waves are spatially superposed. A novel method for the analysis of real-valued electromagnetic field data is presented in this paper. We show that, by combining …