247 citations · 2k across the 36 of their papers we have counts for
6 papers · 1 filter
Metamaterial tuning by manipulation of near-field interaction
David A. Powell, Mikhail Lapine, Maxim Gorkunov +2
We analyze the near-field interaction between the resonant sub-wavelength elements of a metamaterial, and present a method to calculate the electric and magnetic interaction coeffi…
Structural tunability in metamaterials
Mikhail Lapine, David Powell, Maxim Gorkunov +3
We propose a novel approach for efficient tuning of the transmission characteristics of metamaterials through a continuous adjustment of the lattice structure, and confirm it exper…
Nonlinear Electric Metamaterials
David A. Powell, Ilya V. Shadrivov, Yuri S. Kivshar
We propose and design a new type of nonlinear metamaterials exhibiting a resonant electric response at microwave frequencies. By introducing a varactor diode as a nonlinear element…
Asymmetric parametric amplification in nonlinear left-handed transmission lines
David A. Powell, Ilya V. Shadrivov, Yuri S. Kivshar
We study parametric amplification in nonlinear left-handed transmission lines, which serve as model systems for nonlinear negative index metamaterials. We experimentally demonstrat…
Dispersion extraction with near-field measurements in periodic waveguides
Andrey A. Sukhorukov, Sangwoo Ha, Ilya V. Shadrivov +2
We formulate and demonstrate experimentally the high-resolution spectral method based on Bloch-wave symmetry properties for extracting mode dispersion in periodic waveguides from m…
Nonlinear Control of Tunneling Through an Epsilon-Near-Zero Channel
David A. Powell, Andrea Alu, Brian Edwards +3
The epsilon-near-zero (ENZ) tunneling phenomenon allows full transmission of waves through a narrow channel even in the presence of a strong geometric mismatch. Here we experimenta…