Kinetic waves - dynamics of light propagation

Autoresonant propagation of incoherent light-waves.

We study, theoretically and experimentally, the evolution of optical waves with randomly-fluctuating phases in a spatially chirped nonlinear directional coupler. As the system crosses its linear resonance, we observe collective self-phase-locking (autoresonance) of all mutually-incoherent waves, each with its own pump, and simultaneous amplification until the pumps are exhausted. We show that t...

Evidence of X-Shaped Propagation-Invariant Localized Light Waves

Ten years ago Durnin, Miceli, and Eberly [1] reported on the startling first experimental investigation of the socalled nondiffracting Bessel beam, which was formed from a cw laser light by an annular slit and a collimating lens. The beam was found to maintain its sharply peaked radial profile over large distances outclassing the Rayleigh range. During the decade monochromatic Bessel beams have...

Propagation of tectonic waves

Dynamics of light propagation in spatiotemporal dielectric structures.

Propagation, transmission and reflection properties of linearly polarized plane waves and arbitrarily short electromagnetic pulses in one-dimensional dispersionless dielectric media possessing an arbitrary space-time dependence of the refractive index are studied by using a two-component, highly symmetric version of Maxwell's equations. The use of any slow varying amplitude approximation is avo...

Propagation of kinetic Alfvén waves in the ionospheric Alfvén resonator in the presence of density cavities

[1] Recent observations of particle distributions that are narrow in pitch angle and broad in energy have suggested that kinetic Alfvén waves are a significant contributor to auroral particle acceleration. Oscillations at frequencies near 1 Hz are a natural consequence of the propagation of Alfvén waves in the strongly varying Alfvén speed profile above the auroral ionosphere, the so-called ion...