Controlling Electromagnetic Fields
Using the freedom of design that metamaterials provide, we show how electromagnetic fields can be redirected at will and propose a design strategy. The conserved fields—electric...
Publications
12 shownSurface-Enhanced Raman Scattering from Silver-Plated Porous Silicon
Silver micro- and nanocrystallites are prepared on porous Si substrates by immersion plating, and their activity toward SERS (surface-enhanced Raman scattering) is assessed. Sca...
Experimental Verification of a Negative Index of Refraction
We present experimental scattering data at microwave frequencies on a structured metamaterial that exhibits a frequency band where the effective index of refraction ( n ) is neg...
Composite Medium with Simultaneously Negative Permeability and Permittivity
We demonstrate a composite medium, based on a periodic array of interspaced conducting nonmagnetic split ring resonators and continuous wires, that exhibits a frequency region i...
Negative Refractive Index in Left-Handed Materials
The real part of the refractive index n(omega) of a nearly transparent and passive medium is usually taken to have only positive values. Through an analysis of a current source ...
Microwave transmission through a two-dimensional, isotropic, left-handed metamaterial
We present experimental data, numerical simulations, and analytical transfer-matrix calculations for a two-dimensionally isotropic, left-handed metamaterial (LHM) at X-band micr...
Loop-wire medium for investigating plasmons at microwave frequencies
We present numerical simulations and microwave measurements on a loop-wire structure that acts as an effective medium exhibiting a well-defined bulk plasma frequency in the micr...
Metamaterials and Negative Refractive Index
Recently, artificially constructed metamaterials have become of considerable interest, because these materials can exhibit electromagnetic characteristics unlike those of any co...
Electromagnetic parameter retrieval from inhomogeneous metamaterials
We discuss the validity of standard retrieval methods that assign bulk electromagnetic properties, such as the electric permittivity epsilon and the magnetic permeability mu, fr...
Terahertz Magnetic Response from Artificial Materials
We show that magnetic response at terahertz frequencies can be achieved in a planar structure composed of nonmagnetic conductive resonant elements. The effect is realized over a...
Simulation and testing of a graded negative index of refraction lens
A gradient index (GRIN) lens using a negative index of refraction material (NIM) has been designed and tested. The GRIN lens was fabricated using a NIM slab with a variable inde...
Free-space microwave focusing by a negative-index gradient lens
Metamaterial structures designed to have simultaneously negative permittivity and permeability are known as left-handed materials. Their complexity and our understanding of thei...
Frequent Co-Authors
Researcher Info
- h-index
- 12
- Publications
- 12
- Citations
- 37,473
- Institution
- Duke University
External Links
Identifiers
- ORCID
- 0000-0002-4832-6208
Impact Metrics
h-index
12
h-index: Number of publications with at least h citations each.