arXiv subjects

M. Kaczmarek

Publications and source records attributed to M. Kaczmarek.

2 recordsLinked to original sources

arXiv2018

Discriminating Between Coherent and Incoherent Light with Metasurfaces

Metasurfaces represent a powerful paradigm of optical engineering that enables one to control the flow of light across material interfaces. We report on a discovery that metallic metasurfaces of a certain type respond differently to spatially coherent and incoherent light, enabling robust speckle-free discrimination between different degrees of coherence. The effect has no direct analogue in conventional optics and may find applications in compact metadevices enhancing imaging, vision, detection, communication and metrology.

physics.optics↗

arXiv2013

Controlling Intensity and Phase of Terahertz Radiation with an Optically Thin Liquid Crystal-Loaded Metamaterial

We experimentally demonstrate intensity and phase modulation of terahertz radiation using actively controlled large-area planar metamaterial (metafilm) hybridized with a 12 um thick layer of a liquid crystal. Active control was introduced through in-plane electrical switching of the liquid crystal, which enabled us to achieve a reversible single-pass absolute transmission change of 20 % and a phase change of 40 deg at only 20 V.

physics.optics↗