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Achieving transparency with plasmonic and metamaterial coatings.
Here it is seen how a proper design of these lossless metamaterial covers near their plasma resonance may induce a dramatic drop in the scattering cross section, making these objects nearly "invisible" or "transparent" to an outside observer--a phenomenon with obvious applications for low-observability and noninvasive probe design.
Pairing an epsilon-negative slab with a mu-negative slab: resonance, tunneling and transparency
Here, we analyze the transverse-magnetic (TM) wave interaction with a pair of slabs, one being an epsilon-negative (ENG) layer in which the real part of permittivity is assumed to be negative while…
Exceptional points in optics and photonics
The topic of exceptional points in photonics is reviewed and some of the possible exotic behavior that might be expected from engineering such systems are explored, as well as new angle of utilizing gain and loss as new degrees of freedom, in stark contrast with the traditional approach of avoiding these elements.
Circuit elements at optical frequencies: nanoinductors, nanocapacitors, and nanoresistors.
Three basic circuit elements, i.e., nanoinductors, nanocapacitors, and nanoresistors, are discussed in terms of small nanostructures with different material properties, which may provide road maps for the synthesis of more complex circuits in the IR and visible bands.
Full control of nanoscale optical transmission with a composite metascreen.
By applying the optical nanocircuit concepts to metasurfaces, an effective route to locally control light transmission over a deeply subwavelength scale is proposed, which may lead to large improvements in the manipulation of optical transmission and processing of nanoscale optical signals over conformal and Si-compatible substrates.
First-principles homogenization theory for periodic metamaterials
- A. Alú
- Materials Science
- 6 December 2010
We derive from first principles an accurate homogenized description of periodic metamaterials made of magnetodielectric inclusions, highlighting and overcoming relevant limitations of standard…
Guided modes in a waveguide filled with a pair of single-negative (SNG), double-negative (DNG), and/or double-positive (DPS) layers
Here we present the results of our theoretical analysis for guided modes in parallel-plate waveguides filled with pairs of parallel layers made of any two of the following materials: (1) a material…
Magnetless Microwave Circulators Based on Spatiotemporally Modulated Rings of Coupled Resonators
Nonreciprocal components are ubiquitous in electronic and optical systems. To date, the use of magneto-optical materials has been the prevailing method to achieve nonreciprocity. However,…
Magnetic-free non-reciprocity and isolation based on parametrically modulated coupled-resonator loops
Communication systems require non-reciprocal electromagnetic propagation, which is difficult to realize in circuits. An alternative is demonstrated by modulating the phase of strongly coupled…