Topic
Fresnel zone
About: Fresnel zone is a research topic. Over the lifetime, 2337 publications have been published within this topic receiving 37650 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a linear zone plate surface structure was created on the surface of mica crystal and used for obtaining spectrally resolved images of 120 fs laser-produced plasma.
Abstract: A linear zone plate surface structure was created on the surface of mica crystal and used for obtaining spectrally resolved images of 120 fs laser-produced plasma. A linear Fresnel zone structure was optimized on a wavelength λ = 9.16 A and has a focal length of f = 5 cm, minimum zone width Δzn = 300 nm, total length l = 10 cm, total width of zone plate 2rn = 122.6 μm. Images of laser-produced plasma in the spectral range 9.12−9.31 A were obtained. For high Z (Lanthanum) element target the size of the x-ray radiation spot was not more than 20 μm.
4 citations
13 Feb 1986
TL;DR: The Fresnel transform provides a means to implement circuit switching networks by using optical techniques as discussed by the authors, since photons can cross paths without interaction, non-blocking configurations are easy to achieve; the network can be rapidly reconfigured as needed due to the dynamic nature of acousto-optic cells.
Abstract: The Fresnel transform provides a means to implement circuit switching networks by using optical techniques. Since photons can cross paths without interaction, non-blocking configurations are easy to achieve. Furthermore, any arbitrary interconnections between two N-port systems can be configured; the network can be rapidly reconfigured as needed due to the dynamic nature of acousto-optic cells.
4 citations
TL;DR: In this paper, an asymptotic theory of atom scattering by large amplitude periodic potentials is developed in the Raman-Nath approximation, and the atom grating profile resulting from the scattering is evaluated in the Fresnel zone for triangular, sinusoidal, magneto-optical, and bichromatic field potentials.
Abstract: An asymptotic theory of atom scattering by large amplitude periodic potentials is developed in the Raman-Nath approximation. The atom grating profile resulting from the scattering is evaluated in the Fresnel zone for triangular, sinusoidal, magneto-optical, and bichromatic field potentials. Analytic asymptotic expressions are obtained for the Fourier components of the atomic wave function following scattering. It is shown that, owing to the scattering into two groups of momentum states rather than two distinct momentum components, the corresponding spatial density profiles differ significantly from pure sinusoids.
4 citations
TL;DR: In this paper, a family of multi-layer Fresnel Zone Plate (FZP) lenses is proposed to enhance the aperture efficiency, and suppress the backward radiation, in order to analyze the field distribution in the focal region of the lens, an improved full wave analysis based on vector Hankel transform and spectral domain immittance matrix is developed.
Abstract: A family of multi-layer Fresnel Zone Plate (FZP) lenses is proposed to enhance the aperture efficiency, and suppress the backward radiation. In order to analyze the field distribution in the focal region of the lens, an improved full-wave analysis based on vector Hankel transform and spectral domain immittance matrix is developed. Various fundamental properties of FZP lens are given, these properties will provide guidance for designing a FZP lens antenna.
4 citations
12 Oct 1994
TL;DR: In this paper, the waveguide structure is defined as metallic coated gratings which have periods smaller than the wavelength of the incident light and the grooves of these subwavelength gratings can be regarded as waveguides.
Abstract: Waveguide structure in this context means metallic coated gratings which have periods smaller than the wavelength of the incident light. The grooves of these subwavelength gratings can be regarded as waveguides. Since the phase velocity depends on the groove width of the waveguide, the phase of the reflected light is a function of the duty cycle. By adding waveguides with different duty cycles together, binary lattices can be made which approximate nearly every arbitrary continuous phase function. Examples of these waveguide structures are the so-called artificial dielectrics which act as beam deflector, cylindrical Fresnel zone mirror and Fresnel zone mirror. These elements are presented in this paper.
4 citations