Ideal versus realistic non-Foster elements in active metamaterials

2014 ◽  
Author(s):  
Silvio Hrabar ◽  
Boris Okorn ◽  
Vedran Ciganovic ◽  
Igor Krois
Keyword(s):  
Active Metamaterials

scholarly journals Optical pulse dynamics in active metamaterials with positive and negative refractive index

2013 ◽  
Vol 30 (4) ◽  
pp. 1077 ◽  
Author(s):  
Alexander O. Korotkevich ◽  
Kathryn E. Rasmussen ◽  
Gregor Kovačič ◽  
Victor Roytburd ◽  
Andrei I. Maimistov ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Pulse ◽  
Negative Refractive Index ◽  
Pulse Dynamics ◽  
Active Metamaterials

Terahertz Active Metamaterials Based on Stacked Closed-Ring Resonator Arrays

2018 ◽  
Vol 203 (3) ◽  
pp. 56-65
Author(s):  
TATSUNOSUKE MATSUI ◽  
SHUN ASANO ◽  
HIROKI MORI
Keyword(s):  
Ring Resonator ◽  
Active Metamaterials ◽  
Closed Ring ◽  
Resonator Arrays

scholarly journals Active Metamaterials with Negative Static Electric Susceptibility

2020 ◽  
Vol 32 (9) ◽  
pp. 1904863
Author(s):  
Flynn Castles ◽  
Julian A. J. Fells ◽  
Dmitry Isakov ◽  
Stephen M. Morris ◽  
Andrew A. R. Watt ◽  
...  
Keyword(s):  
Active Metamaterials ◽  
Electric Susceptibility

scholarly journals Active metamaterials with broadband controllable stiffness for tunable band gaps and non-reciprocal wave propagation

2019 ◽  
Vol 28 (6) ◽  
pp. 065025 ◽  
Author(s):  
Kaijun Yi ◽  
Morvan Ouisse ◽  
Emeline Sadoulet-Reboul ◽  
Gaël Matten
Keyword(s):  
Wave Propagation ◽  
Band Gaps ◽  
Active Metamaterials

scholarly journals Non-reciprocal robotic metamaterials

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Martin Brandenbourger ◽  
Xander Locsin ◽  
Edan Lerner ◽  
Corentin Coulais
Keyword(s):  
Skin Effect ◽  
Mechanical Energy ◽  
Standing Waves ◽  
Control Loops ◽  
Active Metamaterials ◽  
Mechanical Metamaterials ◽  
Wide Range ◽  
Propagating Waves ◽  
Mechanical Analogue ◽  
Unit Cells

Abstract Non-reciprocal transmission of motion is potentially highly beneficial to a wide range of applications, ranging from wave guiding to shock and vibration damping and energy harvesting. To date, large levels of non-reciprocity have been realized using broken spatial or temporal symmetries, yet mostly in the vicinity of resonances, bandgaps or using nonlinearities, thereby non-reciprocal transmission remains limited to narrow ranges of frequencies or input magnitudes and sensitive to attenuation. Here, we create a robotic mechanical metamaterials wherein we use local control loops to break reciprocity at the level of the interactions between the unit cells. We show theoretically and experimentally that first-of-their-kind spatially asymmetric standing waves at all frequencies and unidirectionally amplified propagating waves emerge. These findings realize the mechanical analogue of the non-Hermitian skin effect. They significantly advance the field of active metamaterials for non hermitian physics and open avenues to channel mechanical energy in unprecedented ways.

scholarly journals Symmetry-Breaking Actuation Mechanism for Soft Robotics and Active Metamaterials

2019 ◽  
Vol 11 (44) ◽  
pp. 41649-41658 ◽  
Author(s):  
Shuai Wu ◽  
Qiji Ze ◽  
Rundong Zhang ◽  
Nan Hu ◽  
Yang Cheng ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Soft Robotics ◽  
Actuation Mechanism ◽  
Active Metamaterials

scholarly journals Phase Conjugation and Negative Refraction using Nonlinear Active Metamaterials

2010 ◽  
Vol 105 (12) ◽  
Author(s):  
Alexander R. Katko ◽  
Shi Gu ◽  
John P. Barrett ◽  
Bogdan-Ioan Popa ◽  
Gennady Shvets ◽  
...  
Keyword(s):  
Negative Refraction ◽  
Phase Conjugation ◽  
Active Metamaterials

External modulators for TeraHertz Quantum Cascade Lasers based on electrically-driven active metamaterials

Metamaterials ◽  
2010 ◽  
Vol 4 (2-3) ◽  
pp. 83-88 ◽  
Author(s):  
X.G. Peralta ◽  
I. Brener ◽  
W.J. Padilla ◽  
E.W. Young ◽  
A.J. Hoffman ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Active Metamaterials ◽  
Cascade Lasers
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