8 papers · 1 filter
Wearable metasurfaces for boosting the effective area of mobile-device antennas
Mohammad M. Asgari, Xianghui Qiu, Francisco S. Cuesta +5
Wireless communications increasingly face scenarios with compact user equipments operating in propagation environments where signal blockage, absorption, and device size limitation…
Permittivity Characterization of 3D-Printed Materials at Millimeter Waves
Kamil Anıl IÅık, Mohammad Mahdi Asgari, Xuchen Wang +4
In this study, we characterize the permittivity of various commercially available materials commonly used in 3D printing over the millimeter-wave frequency range of 70-110 GHz. The…
Stacked Time-Varying Metasurfaces
Mostafa Movahediqomi, Sergei Tretyakov, Viktar Asadchy +1
Spatiotemporal metasurfaces offer unique opportunities for wave manipulation, however, their practical realization is often constrained by the requirement for in-plane spatial modu…
Terahertz frequency conversion at plasma-induced time boundary
Yindong Huang, Bin Zhou, Aijun Xuan +8
We report on the frequency conversions of terahertz (THz) waves at ultrafast time boundaries created via femtosecond laser-induced air-to-plasma phase transitions. Our combined exp…
Photonic time crystals assisted by quasi-bound states in the continuum
P. Garg, E. Almpanis, L. Zimmer +8
Photonic time crystals are a class of artificial materials that have only recently been explored. They are characterized by the ultrafast modulation of the material properties in t…
Inverse-designed dispersive time-varying nanostructures
Puneet Garg, Jan David Fischbach, Aristeidis G. Lamprianidis +5
Time-varying nanostructures allow us to control the spatial and temporal properties of light. The temporal modulation of the nanostructures constitutes an additional degree of free…