Coherent control of a system involves steering an interaction to a final coherent state by controlling the phase of an applied field. Plasmas support coherent wave structures that can be generated by intense laser fields. Here, we demonstrate the coherent control of plasma dynamics in a laser wakefield electron acceleration experiment. A genetic algorithm is implemented using a deformable mirro...

The influence of the dispersion of glass seams only relevant for femtosecond lasers with a pulse length below 100 fs. This commonly used approximation holds only for visible and IR light. For UV fs-laser Z. Bor stated out that due to the large dispersion in the UV regime fs-pulses with a duration of a few hundred femtoseconds are significantly affected in lenses by the group delay [1]. When a p...

Obtaining a tiny focal spot is desired for super resolution. We do vectorial numerical analysis of the linearly, circularly, and radidally polarized electromagnetic fields being focused through dielectric micro/nanoparticle size comparable to wavelength. find spots (up ∼ 0.05 <...

High energy photons can be generated via inverse Compton scattering (ICS) in the collision between energetic electrons and intense laser pulse. The development of plasma accelerators promises compact all-optical gamma-ray sources by colliding from wakefield to its high-power driving pulse reflected a mirror. However, law optical focusing hinders realization both high photon yield monochromatic ...

It is well-known that a strong longitudinal electric field and small spot size are observed when radially polarized beams tightly focused using high numerical aperture parabolic mirror. The component can accelerate electrons along the propagation axis at intensities in focal region, which opens an application particle acceleration. In this paper, we present rigorous derivation of obtained polar...

An ultrasmall spot size scanning laser ophthalmoscope has been developed that employs an annular aberration-corrected incident beam to increase the effective numerical aperture of the eye thereby reducing the width of the probing light spot. Parafovea and foveal cone photoreceptor visibility determined from small area retinal image scans are discussed from the perspective of mode matching betwe...

In this paper we extend the range of applications of the previous work [Fouque et al, Wave Motion 42, 238-260 (2005)]. We consider first the case of an active source embedded below the surface in a finely layered random medium. We perform time reversal with a time reversal mirror placed at the surface and we consider here the case where this mirror is larger than the carrier wavelength. In cont...

We describe a simple way to generate a wide-area high-resolution focus grid by in-line holography and study the factors that impacts its quality. In our holographic recording setup, the reference beam was the direct transmission of the incoming collimated laser beam through a mask coating with thin metal film, and the sample beam was the transmission of the laser through small apertures fabrica...