Anomalous absorptance by stacked metallic cylinders

摘要

We study the transmission, reflection and absorptance of light by stacked periodic gratings consisting of circular metallic wires. We show that the absorptance by such structures of light that is polarized with its electric field parallel to the wires can be anomalously large over a wide wavelength band in the near infrared, especially when the wires are thin. We relate the anomalous absorptance to the lowest propagating mode of the corresponding photonic crystal.