Results 51 to 60 of about 5,729,346 (195)

Atom-wave diffraction between the Raman-Nath and the Bragg regime: Effective Rabi frequency, losses, and phase shifts [PDF]

open access: yes, 2007
We present an analytic theory of the diffraction of (matter) waves by a lattice in the ``quasi-Bragg" regime, by which we mean the transition region between the long-interaction Bragg and ``channeling'' regimes and the short-interaction Raman-Nath regime.
H. Mueller, S. Chiow, S. Chu
semanticscholar   +1 more source

Investigation of the effect of lubricant properties of carbon nanomaterial in Cu/MWCNT composites on wear

open access: yesFrontiers in Materials
This experimental study investigated the abrasive wear behaviour of pure copper-based and multi-walled carbon nanotube (MWCNT) doped composites synthesized by the powder metallurgy technique.
Muharrem Pul   +9 more
doaj   +1 more source

Enhanced Nonlinear Optical Effect in Hybrid Liquid Crystal Cells Based on Photonic Crystal

open access: yesNanoscale Research Letters, 2017
Nonlinear-optical response of photorefractive hybrid liquid crystal (LC) cells has been studied by means of dynamic holographic technique in two-wave mixing arrangement.
Svitlana Bugaychuk   +4 more
doaj   +1 more source

Efficient coupling of light to an atomic tweezer array in a cavity

open access: yesPhysical Review Research
We consider the coupling of light, via an optical cavity, to two-dimensional atomic arrays whose lattice spacing exceeds the wavelength of the light. Such “superwavelength” spacing is typical of optical tweezer arrays.
Yakov Solomons   +4 more
doaj   +1 more source

Impedance and loss factor of a coaxial liner with many holes: Effect of the attenuation

open access: yesPhysical Review Special Topics. Accelerators and Beams, 1999
In the framework of the modified Bethe's diffraction theory, we study the energy lost by a relativistic particle beam traveling in a coaxial liner with many holes, including the effect of attenuation in the coaxial region.
A. Mostacci, L. Palumbo, F. Ruggiero
doaj   +1 more source

Densification-Induced Structure Changes in Basolite MOFs: Effect on Low-Pressure CH4 Adsorption

open access: yesNanomaterials, 2020
Metal-organic frameworks’ (MOFs) adsorption potential is significantly reduced by turning the original powder into pellets or granules, a mandatory step for their use at industrial scale.
David Ursueguía   +2 more
doaj   +1 more source

Analytical Model of Three-Dimensional Ultrasonic Beam Interaction with an Immersed Plate

open access: yesArchives of Acoustics, 2018
This paper proposes an analytical model to describe the interaction of a bounded ultrasonic beam with an immersed plate. This model, based on the Gaussian beams decomposition, takes into account multiple reflections into the plate.
Hanane SOUCRATI   +3 more
doaj   +1 more source

Magnetic spectra and Richter aftereffect relaxation in CexY3−xFe5O12 ferrites

open access: yesAIP Advances, 2016
The static and dynamic magnetic properties of cerium (Ce) doped yttrium iron garnet CexY3−xFe5O12 (x=0, 0.05, 0.1, 0.15, 0.2) ferrites (YIG) have been reported in this work. The ferrites were fabricated by the traditional solid-state reaction method. All
Fu Chen   +4 more
doaj   +1 more source

A Sustainable Approach to Fabricating Ag Nanoparticles/PVA Hybrid Nanofiber and Its Catalytic Activity

open access: yesNanomaterials, 2015
Ag nanoparticles were synthesized by using Ficus altissima Blume leaf extract as a reducing agent at room temperature. The resulting Ag nanoparticles/PVA mixture was employed to create Ag nanoparticles/PVA (polyvinyl alcohol) hybrid nanofibers via an ...
Yongde Meng
doaj   +1 more source

Kerr frequency comb generation in fiber Fabry-Pérot resonator: Technological locks and leveraging fiber properties [PDF]

open access: yesEPJ Web of Conferences
We explore fiber Fabry-Pérot (FFP) resonators, a new platform for frequency comb generation We experimentally identified mirror diffraction losses dependent on the effective area of the fiber and simulated them via Fourier optics. In the nonlinear regime,
Bourcier Germain   +9 more
doaj   +1 more source

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