Andrea Alú

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Achieving transparency with plasmonic and metamaterial coatings.

Andrea Alú, Nader Engheta
Physical review. E, Statistical, nonlinear, and…
2005

The possibility of using plasmonic and metamaterial covers to drastically reduce the total scattering cross section of spherical and cylindrical objects is discussed. While it is intuitively expected… (More)

Circuit elements at optical frequencies: nanoinductors, nanocapacitors, and nanoresistors.

Nader Engheta, Alessandro Salandrino, Andrea Alú
Physical review letters
2005

We present the concept of circuit nanoelements in the optical domain using plasmonic and nonplasmonic nanoparticles. Three basic circuit elements, i.e., nanoinductors, nanocapacitors, and… (More)

Subwavelength, Compact, Resonant Patch Antennas Loaded With Metamaterials

Andrea Alú, Filiberto Bilotti, Nader Engheta, Lucio Vegni
IEEE Transactions on Antennas and Propagation
2007

We analyze the matching and radiation properties of subwavelength resonant patch antennas filled with double-negative, double-positive, and/or single-negative metamaterial blocks. Analyzing the… (More)

Guided modes in a waveguide filled with a pair of single-negative (SNG), double-negative (DNG), and/or double-positive (DPS) layers

Andrea Alú, Nader Engheta
IEEE Transactions on Microwave Theory and…
2004

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… (More)

Experimental verification of epsilon-near-zero metamaterial coupling and energy squeezing using a microwave waveguide.

Brian Edwards, Andrea Alú, Michael E. Young, Mario G. Silveirinha, Nader Engheta
Physical review letters
2008

Utilizing a microwave setup, we experimentally verify our recently developed theory of energy squeezing and tunneling [Phys. Rev. Lett. 97, 157403 (2006)10.1103/PhysRevLett.97.157403] through an… (More)

Full control of nanoscale optical transmission with a composite metascreen.

Francesco Monticone, Nasim Mohammadi Estakhri, Andrea Alú
Physical review letters
2013

By applying the optical nanocircuit concepts to metasurfaces, we propose an effective route to locally control light transmission over a deeply subwavelength scale. This concept realizes the optical… (More)

Input impedance, nanocircuit loading, and radiation tuning of optical nanoantennas.

Andrea Alú, Nader Engheta
Physical review letters
2008

Here we explore the radiation features of optical nanoantennas, analyzing the concepts of optical input impedance, optical radiation resistance, impedance matching, and loading of plasmonic… (More)

Dielectric sensing in ε-near-zero narrow waveguide channels

Andrea Alú, Nader Engheta
2010

We exploit here the dramatic field enhancement caused by energy squeezing and tunneling i.e., "supercoupling" in metamaterial-inspired ultranarrow waveguide channels with near-zero effective… (More)

Twisted optical metamaterials for planarized ultrathin broadband circular polarizers.

Luis Sentis, Mikhail Belkin, Andrea Alú
Nature communications
2012

Optical metamaterials are usually based on planarized, complex-shaped, resonant nano-inclusions. Three-dimensional geometries may provide a wider set of functionalities, including broadband chirality… (More)

Negative effective permeability and left-handed materials at optical frequencies.

Andrea Alú, Alessandro Salandrino, Nader Engheta
Optics express
2006

We present here the design of nano-inclusions made of properly arranged collections of plasmonic metallic nano-particles that may exhibit a resonant magnetic dipole collective response in the visible… (More)

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