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12 papers · 2 filters
Reversible modulation and ultrafast dynamics of THz resonances in strongly photoexcited metamaterials
I. Chatzakis, L. Luo, J. Wang +4
We demonstrate an ultrafast reversible modulation of resonant terahertz (THz) response in strongly photoexcited metamaterials. The transient spectral-temporal response of the dipol…
Structural and Magnetic Properties of Sm(Co0.7Fe0.1Ni0.12Zr0.04B0.04)7.5 Melt Spun Isotropic and Anisotropic Ribbons
Sofoklis S. Makridis, Wei Tang
We have investigated the structural and magnetic properties of Sm(Co0.7Fe0.1Ni0.12Zr0.04B0.04)7.5 melt spun ribbons. Samples were arc melted then melt spun at 37 m/s up to 55 m/s t…
Thermal conductivity and diffusion-mediated localization in Fe_{1-x}Cr_{x} Alloys
Aftab Alam, Rajiv K. Chouhan, Abhijit Mookerjee
We apply a new Kubo-Greenwood type formula combined with a generalized Feynman diagram- matic technique to report a first principles calculation of the thermal transport properties…
Accurate and fast numerical solution of Poisson's equation for arbitrary, space-filling Voronoi polyhedra: near-field corrections revisited
Aftab Alam, Brian G. Wilson, D. D. Johnson
We present an accurate and rapid solution of Poisson's equation for space-filling, arbitrarily- shaped, convex Voronoi polyhedra (VP); the method is O(NVP), where NVP is the number…
Chemically-Mediated quantum criticality in NbFe_2
Aftab Alam, D. D. Johnson
Laves-phase Nb{1+c}Fe_{2-c} is a rare itinerant intermetallic compound exhibiting magnetic quantum criticality at c_{cr}=1.5%Nb excess; its origin, and how alloying mediates it, re…
Switching nonlinearity in a superconductor-enhanced metamaterial
Cihan Kurter, Philippe Tassin, Alexander P. Zhuravel +5
We demonstrate a nonlinear metamaterial that can be switched between low and high transmission by controlling the power level of the incident beam. The origin of this nonlinear res…