642 citations · 1.9k across the 40 of their papers we have counts for
7 papers · 1 filter
Space-Wave Routing via Surface Waves Using a Metasurface System
Karim Achouri, Christophe Caloz
We introduce the concept of a metasurface system able to route space wave via surface waves. This concept may be used to laterally shift or modulate the beam width of scattered wav…
Spontaneous Emission and Light Extraction Enhancement of Light Emitting Diode Using Partially-Reflecting Metasurface Cavity (PRMC)
Luzhou Chen, Karim Achouri, Themos Kallos +1
The enhancement of the power conversion efficiency (PCE), and subsequent reduction of cost, of light emitting diodes (LEDs) is of crucial importance in the current lightening marke…
Nonreciprocal Nongyrotropic Magnetless Metasurface
Sajjad Taravati, Bakhtiar A. Khan, Shulabh Gupta +2
We introduce a nonreciprocal nongyrotropic magnetless metasurface. In contrast to previous nonreciprocal structures, this metasurface does not require a biasing magnet, and is ther…
Synthesis and Applications of Birefringent Metasurfaces
Karim Achouri, Guillaume Lavigne and, Christophe Caloz
Birefringent metasurfaces are two-dimensional structures capable of independently controlling the amplitude, phase and polarization of orthogonally polarized incident waves. In thi…
Dielectric Resonator Metasurface for Dispersion Engineering
Karim Achouri, Ali Yahyaoui, Shulabh Gupta +2
We introduce a practical dielectric metasurface design for microwave frequencies. The metasurface is made of an array of dielectric resonators held together by dielectric connectio…
Spacetime Processing Metasurfaces: GSTC Synthesis and Prospective Applications
Nima Chamanara, Yousef Vahabzadeh, Karim Achouri +1
The paper presents the general concept of spacetime processing metasurfaces, synthesized by generalized sheet transition conditions (GSTCs). It is shown that such metasurfaces can…
Simulation of Metasurfaces in Finite Difference Techniques
Yousef Vahabzadeh, Karim Achouri, Christophe Caloz
We introduce a rigorous and simple method for analyzing metasurfaces, modeled as zero-thickness electromagnetic sheets, in Finite Difference (FD) techniques. The method consists in…