Search Results for "Fractal Nonlinear Resonance"

21:03 EDT 18th April 2015 | BioPortfolio

Original Source: Nonlinear resonance-enhanced excitation of surface plasmon polaritons.

We theoretically investigate nonlinear resonance-enhanced excitation of surface plasmon polaritons in a metal coated by a one-dimensional photonic crystal. Tunneling modes above the air-light line can be directly excited in this structure. Then, with suitable parameters, photon energy and momentum conservation between the tunneling mode and the surface plasmon polaritons can be realized by means of nonlinear four-wave mixing. Compared with the nonlinear excitation of surface plasmon polaritons in a bulk met...

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Predicting nonlinear properties of metamaterials from the linear response

Nonlinear scattering theory, contrary to Miller’s rule, is shown to be able to establish the nonlinear optical response of metamaterials, a tool that can be used towards the efficient design of stro...

Fractal patterns may uncover new line of attack on cancer

(Institute of Physics) Studying the intricate fractal patterns on the surface of cells could give researchers a new insight into the physical nature of cancer, and provide new ways of preventing the d...

Finding the simple patterns in a complex world: ANU media release

An Australian National University (ANU) mathematician has developed a new way to uncover simple patterns that might underlie apparently complex systems, such as clouds, cracks in materials or the move...

Controllable spatiotemporal nonlinear effects in multimode fibres

Highly nonlinear effects are observed in graded-index multimode optical fibres.

Controlling light with metamaterial-based nonlinear photonic crystals

Nonlinearity engineering is demonstrated by the construction of metamaterial-based photonic crystals. Nonlinear emission and diffraction are controlled and intense focusing is reported.

Multi-scale Fractal-based Methods for Useful Characterizations of Surface Topographies

Nonlinear π phase shift for single fibre-guided photons interacting with a single resonator-enhanced atom

A nonlinear π phase shift is induced by the interaction between a 85Rb atom and a fibre-coupled bottle resonator.

Breakthrough in nonlinear optics research

A method to selectively enhance or inhibit optical nonlinearities in a chip-scale device has been developed by scientists, led by the Univ. of Sydney. The researchers from the Centre for Ultrahigh ban...

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Self-avoiding walk on fractal complex networks: Exactly solvable cases.

We study the self-avoiding walk on complex fractal networks called the (u,v)-flower by mapping it to the N-vector model in a generating function formalism. First, we analytically calculate the critica...

Anomalous diffusion in a quenched-trap model on fractal lattices.

Models with mixed origins of anomalous subdiffusion have been considered important for understanding transport in biological systems. Here one such mixed model, the quenched-trap model (QTM) on fracta...

Radiofrequency pulse design using nonlinear gradient magnetic fields.

An iterative k-space trajectory and radiofrequency (RF) pulse design method is proposed for excitation using nonlinear gradient magnetic fields.

Fractal Gait Patterns Are Retained after Entrainment to a Fractal Stimulus.

Previous work has shown that fractal patterns in gait can be altered by entraining to a fractal stimulus. However, little is understood about how long those patterns are retained or which factors may ...

Integrable approximation of regular regions with a nonlinear resonance chain.

Generic Hamiltonian systems have a mixed phase space where regions of regular and chaotic motion coexist. We present a method for constructing an integrable approximation to such regular phase-space r...

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