@Article{fdmp.2026.071903,
AUTHOR = {Andrey Pryamikov},
TITLE = {Reverse Energy Flows in Two-Dimensional Photonic Crystals and Similarities with Vortex Formation and Analogous Flows in Hydrodynamics},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {22},
YEAR = {2026},
NUMBER = {3},
PAGES = {0--0},
URL = {http://www.techscience.com/fdmp/v22n3/66833},
ISSN = {1555-2578},
ABSTRACT = {This paper examines the connection between photonic band-gap formation in two types of two-dimensional photonic crystals and the emergence of reverse electromagnetic energy flows generated by linearly polarized plane waves incident on a photonic-crystal slab. We show that these reverse energy flows, observed in both transmitted and reflected fields, originate from vortex structures in the Poynting vector. The resulting energy-flow patterns exhibit striking analogies to vortex formation in fluid motion past obstacles. The geometry and dynamics of the Poynting-vector vortices determine whether the incident electromagnetic energy is impeded, leading to the formation of photonic band gaps, or instead guided through the structure, enabling transmission.},
DOI = {10.32604/fdmp.2026.071903}
}