DukeSpace Home
→
Browsing by Duke-affiliated Author

Browsing by Duke-affiliated Author "Smith, David R."

Now showing items 1-20 of 23

Acoustic cloaking transformations from attainable material properties

Urzhumov, Yaroslav A.; Ghezzo, Fabrizia; Hunt, John; Smith, David R. (New Journal of Physics, 2010-07-12)

We propose a general methodology and a set of practical recipes for the construction of ultra-broadband acoustic cloaks—structures that can render themselves and a concealed object undetectable by means of acoustic scattering. ...
Analysis of the power dependent tuning of a varactor-loaded metamaterial at microwave frequencies

Huang, Da; Poutrina, Ekaterina; Smith, David (AMER INST PHYSICS, 2010)

We present an analysis of the nonlinear, power-dependent resonance frequency shift for two metamaterial mediums consisting of arrays of varactor-loaded split ring resonators (VLSRRs). We confirm that, over a limited range ...
Analytic expressions for the constitutive parameters of magnetoelectric metamaterials

Smith, David (AMER PHYSICAL SOC, 2010)

Electromagnetic metamaterials are artificially structured media typically composed of arrays of resonant electromagnetic circuits, the dimension and spacing of which are considerably smaller than the free-space wavelengths ...
Characterization of high order modes of plasmonic antenna formed by nanoparticle/thin film hybrid structures

Chen, Shiuan-Yeh; Urzhumov, Yaroslav A.; Smith, David R.; Lazarides, Anne A. (SPIE, 2012-02-01)

The plasmonic modes of a nano-antenna formed by a nanoparticle/thin film hybrid system are investigated. Plasmonic nano-antennas are well-known for their capabilities to concentrate electromagnetic wave into extreme small ...
Controlling the Second Harmonic in a Phase-Matched Negative-Index Metamaterial

Rose, Alec; Huang, Da; Smith, David (American Physical Society, 2011-08-01)

Nonlinear metamaterials have been predicted to support new and exciting domains in the manipulation of light, including novel phase-matching schemes for wave mixing. Most notable is the so-called nonlinear-optical mirror, ...
Cross-section comparisons of cloaks designed by transformation optical and optical conformal mapping approaches

Urzhumov, Yaroslav A.; Kundtz, Nathan; Smith, David R.; Pendry, John B. (Journal of Optics, 2010-11-16)

We review several approaches to optical invisibility designed using transformation optics (TO) and optical conformal mapping (CM) techniques. TO is a general framework for solving inverse scattering problems based on ...
Designing Three-Dimensional Transformation Optical Media Using Quasiconformal Coordinate Transformations

Landy, N. I.; Kundtz, N.; Smith, David (AMER PHYSICAL SOC, 2010)

We introduce an approach to the design of three-dimensional transformation optical (TO) media based on a generalized quasiconformal mapping approach. The generalized quasiconformal TO (QCTO) approach enables the design of ...
Enhancing imaging systems using transformation optics

Smith, David; Urzhumov, Yaroslav A.; Kundtz, Nathan B.; Landy, Nathan I. (OPTICAL SOC AMER, 2010)

We apply the transformation optical technique to modify or improve conventional refractive and gradient index optical imaging devices. In particular, when it is known that a detector will terminate the paths of rays over ...
Experimental determination of the quadratic nonlinear magnetic susceptibility of a varactor-loaded split ring resonator metamaterial

Larouche, Stephane; Rose, Alec; Poutrina, Ekaterina; Huang, Da; Smith, David (AMER INST PHYSICS, 2010)

This letter presents a quantitative measurement of the second harmonic generated by a slab of varactor loaded split ring resonator metamaterial and the retrieval of the effective quadratic nonlinear magnetic susceptibility ...
Fluid Flow Control with Transformation Media

Urzhumov, Yaroslav A.; Smith, David R. (Physical Review Letters, 2011-08-12)

We introduce a new concept for the manipulation of fluid flow around three-dimensional bodies. Inspired by transformation optics, the concept is based on a mathematical idea of coordinate transformations and physically ...
Gold Nanoparticles on Polarizable Surfaces as Raman Scattering Antennas

Chen, Shiuan-Yeh; Mock, Jack; Smith, David; Lazarides, Anne (AMER CHEMICAL SOC, 2010)

Surface plasmons supported by metal nanoparticles are perturbed by coupling to a surface that is polarizable Coupling results in enhancement of near fields and may increase the scattering efficiency of radiative modes. In ...
Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves

Urzhumov, Yaroslav A.; Landy, Nathan; Smith, David R. (American Institute of Physics, 2012-03-06)

We propose a generalization of the two-dimensional eikonal-limit cloak derived from a conformal transformation to three dimensions. The proposed cloak is a spherical shell composed of only isotropic media; it operates in ...
Leveraging Nanoscale Plasmonic Modes to Achieve Reproducible Enhancement of Light

Mock, Jack; Urzhumov, Yaroslav A.; Chen, Shiuan-Yeh; Smith, David (AMER CHEMICAL SOC, 2010)

The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications Here, ...
Magnetic levitation of metamaterial bodies enhanced with magnetostatic surface resonances

Urzhumov, Yaroslav A.; Chen, Wenchen; Bingham, Chris; Padilla, Willie; Smith, David R. (American Physical Society, 2012-02-27)

We propose that macroscopic objects built from negative-permeability metamaterials may experience resonantly enhanced magnetic force in low-frequency magnetic fields. Resonant enhancement of the timeaveraged force originates ...
Magnetic superlens-enhanced inductive coupling for wireless power transfer

Huang, Da; Urzhumov, Yaroslav A.; Smith, David R.; Teo, Koon Hoo; Zhang, Jinyun (American Institute of Physics, 2012-03-20)

We investigate numerically the use of a negative-permeability “perfect lens” for enhancing wireless power transfer between two current carrying coils. The negative permeability slab serves to focus the flux generated in ...
Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer

Urzhumov, Yaroslav A.; Smith, David R. (Physical Review B, 2011-05-15)

Nonradiative coupling between conductive coils is a candidate mechanism for wireless energy transfer applications. In this paper we propose a power relay system based on a near-field metamaterial superlens and present a ...
Nonlinear long-range plasmonic waveguides

Degiron, Aloyse; Smith, David (AMER PHYSICAL SOC, 2010)

We report on plasmonic waveguides made of a thin metal stripe surrounded on one or both sides by a Kerr nonlinear medium. Using an iterative numerical method, we investigate the stationary long-range plasmons that exist ...
Nonlinear oscillator metamaterial model: numerical and experimental verification

Poutrina, Ekaterina; Huang, D; Urzhumov, Yaroslav A.; Smith, David R. (Optics Express, 2011-04-25)

We verify numerically and experimentally the accuracy of an analytical model used to derive the effective nonlinear susceptibilities of a varactor-loaded split ring resonator (VLSRR) magnetic medium. For the numerical ...
Nonlinear parameter retrieval from three- and four-wave mixing in metamaterials

Rose, Alec; Larouche, Stephane; Huang, Da; Poutrina, Ekaterina; Smith, David (AMER PHYSICAL SOC, 2010)

We present a generalized nonlinear susceptibility retrieval method for metamaterials based on transfer matrices and valid in the nondepleted pump approximation. We construct a general formalism to describe the transfer ...
Parametric analysis of the strain-dependent behavior of a metamaterial electric resonator

Smith, David (AMER INST PHYSICS, 2010)

In this paper, we describe the strain-dependent behavior of an electric-LC (ELC) resonator unit cell, commonly used in metamaterial designs. We leverage analytic expression to understand the way strain manifests itself in ...

Now showing items 1-20 of 23

Search DukeSpace

Advanced Search

Browse

All of DukeSpace

Browsing by Duke-affiliated Author "Smith, David R."

DukeSpace

Browsing by Duke-affiliated Author "Smith, David R."

Search DukeSpace

Browse

All of DukeSpace

My Account