نتایج جستجو برای: light diffraction

تعداد نتایج: 455802  

1995
LÜ Baida

Based on the propagation theory of partially coherent light in the space-frequency domain, the anomalous spectral behavior and spectral switches in the far field of partially coherent and polychromatic light diffracted at an aperture are studied. It is shown that, as compared with spatially fully coherent and polychromatic light whose spectral anomalies are induced only by aperture diffraction,...

Journal: Nanochemistry Research 2019

In this study, we have reported the green synthesis magnesium ferrite using tragacanth gel by the sol-gel method without using any organic chemicals. The sample was characterized by powder X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), vibrating sample magnetometer (VSM) and scanning electron microscopy (SEM). The X-ray powder diffraction (XRD) analysis revealed the fo...

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In this paper, the bismuth vanadate (BiVO4) nanoparticles were synthesized at 600 °C calcination temperature by co-precipitation method. To study the crystal structure, morphology, optical and photocatalytic properties of the samples, the X-ray diffraction analysis, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy and ult...

Journal: :iranian journal of catalysis 0
solmaz aghdasi department of chemistry, tabriz branch, islamic azad university, p.o. box: 5157944533, tabriz, iran. mohammad shokri department of chemistry, tabriz branch, islamic azad university, p.o. box: 5157944533, tabriz, iran.

this study was aimed at investigating the photocatalytic degradation of ciprofloxacin (cip) antibiotic in aqueous solution using immobilized zno nanoparticles on glass plate. x-ray diffraction, atomic force microscopy, and scanning electron microscopy were applied to characterize the nanoparticles. to do so, the zno nanoparticles were synthesized through the chemical precipitation method and we...

Journal: :international journal of nanoscience and nanotechnology 2015
m. mirzaei h. ahadi m. shariaty-niassar m. akbari

in this research fe-tio2 nanocomposites with different molar ratios of fe/ti were prepared as nano-photocatalyst using a modified sol-gel process at ambient temperature. crystallographic properties of nanocomposites were characterized by x-ray diffraction (xrd). surface morphology and mean particle size of nanocomposites were specified by field emission scanning electron microscopy (fesem) and ...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2011
Nicholas Barbieri Matthew Weidman Gregory Katona Matthieu Baudelet Zachary Roth Eric Johnson Georgios Siviloglou Demetrios Christodoulides Martin Richardson

We demonstrate the generation of a nondiffracting double helical beam using axicons and ±1 vortex phase plates in a common-path interferometric system. Using linear diffraction theory, a simple analytical expression describing beam propagation is shown to agree with both experiments and Fresnel-diffraction-based simulations. Experiments are performed using continuous laser light in addition to ...

Journal: :Physical review letters 2004
Olga Smirnova Daniel L Freimund Herman Batelaan Misha Ivanov

We discuss electron diffraction from two counterpropagating light waves with two different frequencies. We show that, even though these waves do not form a standing wave, electron diffraction similar to the conventional Kapitza-Dirac effect, i.e., scattering on a standing wave, is still possible. The nonlinear response of the electron to the laser fields creates a stationary diffraction grating...

2016
Raj Kumar

Present work reports formation of Young’s double-slit interference fringes using the Young's own theory of diffraction called the theory of boundary diffraction wave. Theory demands that double-slit interference fringes are generated due to superposition of boundary diffraction waves originating from the edges of the slits due to their physical interaction with the incident light. The theoretic...

1998
W. Sinkler L. D. Marks D. D. Edwards T. O. Mason K. R. Poeppelmeier Z. Hu J. D. Jorgensen

Direct methods using dynamical transmission electron diffraction (TED) intensities is applied to the solution of (Ga,In)2SnO5. Dynamical diffraction effects in the TED data lead to an emphasis of oxygen positions in the structure. Application of direct methods to dynamical diffraction intensities represents a valuable new technique for obtaining approximate atom positions of light elements in c...

Journal: :Physical review letters 2005
F Ferri D Magatti A Gatti M Bache E Brambilla L A Lugiato

High-resolution ghost image and ghost diffraction experiments are performed by using a single classical source of pseudothermal speckle light divided by a beam splitter. Passing from the image to the diffraction result solely relies on changing the optical setup in the reference arm, while leaving the object arm untouched. The product of spatial resolutions of the ghost image and ghost diffract...

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