Phys.org March 13, 2023 A team of researchers in the US (City University of New York, City College of New York, Syracuse University) has reported the observation of photonic time reflection and associated broadband frequency translation in a switched transmission-line metamaterial whose effective capacitance is homogeneously and abruptly changed via a synchronized array of switches. A pair of temporal interfaces are combined to demonstrate time-reflection-induced wave interference, realizing the temporal counterpart of a Fabry–Pérot cavity. According to the researchers their results establish the foundational building blocks to realize time metamaterials and Floquet photonic crystals, with opportunities for extreme photon manipulation […]
Category Archives: Electromagnetic waves
Success in visualizing the propagation path of electromagnetic waves from space to ground
Science Daily December 9, 2021 Electromagnetic ion cyclotron waves (EMIC waves) are an important class of EM wave in Geospace that control variations in the Geospace plasma environment. The EMIC waves are considered to propagate north to south along the geomagnetic field lines. The specific spatial size of the EMIC wave source region and the 3D aspect of how the propagation path is formed from space to ground are yet to be elucidated. An international team of researchers (Japan, USA – University of Colorado, University of Minnesota, Los Alamos National Laboratory, Canada) investigated the growth and propagation of fine-structured EMIC […]