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- Nader Engheta, Alessandro Salandrino, Andrea Alù
- 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 nanoresistors, are discussed in terms of small nanostructures with different material properties. Coupled nanoscale circuits and parallel and series combinations are also… (More)

In this work, we investigate the response of epsilon-near-zero metamaterials and plasmonic materials to electromagnetic source excitation. The use of these media for tailoring the phase of radiation pattern of arbitrary sources is proposed and analyzed numerically and analytically for some canonical geometries. In particular, the possibility of employing… (More)

- A Alù, A Salandrino, N 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 domain. When such inclusions are embedded in a host medium, they may provide metamaterials with negative effective permeability at optical frequencies. We also… (More)

Here we suggest and explore theoretically an idea for a far-field scanless optical microscopy with a subdif-fraction resolution. We exploit the special dispersion characteristics of an anisotropic metamaterial crystal that is obliquely cut at its output plane, or has a curved output surface, in order to map the input field distribution onto the crystal's… (More)

A Yagi-Uda-like optical nanoantenna concept using resonant core-shell plasmonic particles as its " reflectors " and " directors " is studied numerically. Such particles when placed near an optical dipole source in a certain arrangement may exhibit large induced dipole moments, resulting in shaping the far-field radiation pattern, analogous to the far field… (More)

- Haim Suchowski, Kevin O'Brien, Zi Jing Wong, Alessandro Salandrino, Xiaobo Yin, Xiang Zhang
- Science
- 2013

Phase matching is a critical requirement for coherent nonlinear optical processes such as frequency conversion and parametric amplification. Phase mismatch prevents microscopic nonlinear sources from combining constructively, resulting in destructive interference and thus very low efficiency. We report the experimental demonstration of phase mismatch-free… (More)

- Peng Zhang, Yi Hu, +5 authors Zhigang Chen
- Optics letters
- 2012

We study linear and nonlinear self-accelerating beams propagating along circular trajectories beyond the paraxial approximation. Such nonparaxial accelerating beams are exact solutions of the Helmholtz equation, preserving their shapes during propagation even under nonlinearity. We generate experimentally and observe directly these large-angle bending beams… (More)

- Alessandro Salandrino, Demetrios N Christodoulides
- CLEO/QELS: 2010 Laser Science to Photonic…
- 2010

We introduce a new class of non-diffracting surface plasmons: the Airy plasmon. The self bending and self healing behavior of these solutions is analyzed. Schemes for experimental realization and potential applications are discussed.

Here we present and analyze an optical spectrum analyzer at the nanometer scale that is able to distribute different frequency contents of the radiation of an optical dipole source into different directions in the space. The spectrum analyzer is composed of arrays of optical Yagi-Uda nanoantennas, forming relatively narrow radiation patterns operating at… (More)

- Andrea Alú, Alessandro Salandrino, Nader Engheta
- Optics express
- 2007

We present here an analytical quasi-static circuit model for the coupling among small nanoparticles excited by an optical electric field in the framework of the optical lumped nanocircuit theory [N. Engheta, A. Salandrino, and A. Alù, Phys. Rev. Lett. 95, 095504 (2005)]. We derive how coupling effects may affect the corresponding nanocircuit model by adding… (More)