Generation of optical vortices using light-induced phase mask in a V-type system

2004 ◽  
Vol 242 (1-3) ◽  
pp. 199-207
Author(s):  
Jin-Ho Jeon ◽  
Wonshik Choi ◽  
Myoung-Kyu Oh ◽  
Kyungwon An ◽  
Jai-Hyung Lee
Keyword(s):  
Type System ◽  
Phase Mask ◽  
Optical Vortices

Measuring the Topological Charge of Optical Vortices Using Elliptical Airy Phase Mask

2020 ◽  
Vol 32 (12) ◽  
pp. 741-744 ◽  
Author(s):  
Liqi Ding ◽  
Zhang Meng ◽  
Shaotong Feng ◽  
Shouping Nie ◽  
Jun Ma ◽  
...  
Keyword(s):  
Topological Charge ◽  
Phase Mask ◽  
Optical Vortices

Fabrication of a three-dimensional optical vortices phase mask for astronomy by means of electron-beam lithography

2009 ◽  
Vol 86 (4-6) ◽  
pp. 1103-1106 ◽  
Author(s):  
M. Prasciolu ◽  
F. Tamburini ◽  
G. Anzolin ◽  
E. Mari ◽  
M. Melli ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Three Dimensional ◽  
Phase Mask ◽  
Optical Vortices

scholarly journals Generation of Optical Vortices by Linear Phase Ramps

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Sunil Vyas
Keyword(s):  
Numerical Simulation ◽  
Intensity Distribution ◽  
Spatial Light Modulator ◽  
Phase Mask ◽  
Computational Techniques ◽  
Optical Vortices ◽  
Vortex Generation ◽  
Linear Phase ◽  
Light Modulator ◽  
Phase Discontinuity

Generation of optical vortices using linear phase ramps is experimentally demonstrated. When two regions of a wavefront have opposite phase gradients then along the line of phase discontinuity vortices can be generated. It is shown that vortices can evolve during propagation even with the unequal magnitude of tilt in the two regions of the wavefront. The number of vortices and their location depend upon the magnitude of tilt. vortex generation is experimentally realized by encoding phase mask on spatial light modulator and their presence is detected interferometrically. Numerical simulation has been performed to calculate the diffracted intensity distribution from the phase mask, and presence of vortices in the diffracted field is detected by computational techniques.

Ultrastructural characteristics of sporidia of Ustilago

1989 ◽  
Vol 47 ◽  
pp. 786-787
Author(s):  
Patricia N. Hackney
Keyword(s):  
Electron Microscope ◽  
Type System ◽  
Tube Formation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
Transmission Electron ◽  
Ustilago Hordei ◽  
Silene Alba ◽  
The University

Ustilago hordei and Ustilago violacea are yeast-like basidiomycete pathogens ofHordeum vulgare and Silene alba respectively. The mating type system in both species of Ustilago is bipolar, with alleles, A,a, (U.hordei) and a1, a2 (U.violacea) at a single locus. Haploid sporidia maintain the asexual phase by budding, while the sexual phase is initiated by conjugation tube formation between the mating types during budding and conjugation.For observation of budding, sporidia were prepared by culturing the four types on YEG (yeast extract glucose) broth for 24 hours. After centrifugation at 5000g cells were either left unmated or mated in a1/a2,A/a combinations. The sporidia were then mixed 1:1 with 4% agar and the resulting 1mm cubes fixed in 8% gluteraldehyde and post fixed in osmium tetroxide. After dehydration and embedding cubes were thin sectioned with a LKB ultratome and photographed in a Zeiss 9s transmission electron microscope or in an AE1 electron microscope of MK11 1MEV at the High Voltage Electron Microscopy Center of the University of Wisconsin-Madison.

Fabrication of two-layer integrated phase mask and single-beam, single exposure fabrication of 3D photonic crystal template using the mask

2008 ◽  
Author(s):  
Yuankun Lin ◽  
Ahmad Harb ◽  
Daniel Rodriguez ◽  
Karen Lozano ◽  
Di Xu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Phase Mask ◽  
Single Exposure ◽  
Single Beam

Thermal comfort conditions in a classroom conditioned by a split-type system

2017 ◽  
Author(s):  
Rogério Vilain ◽  
Marcelo Pereira ◽  
Nathan Mendes ◽  
katia cordeiro ◽  
anastacio da silva junior
Keyword(s):  
Thermal Comfort ◽  
Type System

Modelling of impregnation of γ-alumina with cobalt and molybdenum salts. CoCl2-(NH4)2MoO4-γ-Al2O3 (aluminate type) system

1987 ◽  
Vol 52 (3) ◽  
pp. 663-671 ◽  
Author(s):  
Jiří Hanika ◽  
Vladimír Janoušek ◽  
Karel Sporka
Keyword(s):  
Effective Diffusion ◽  
Type System ◽  
Catalyst Particle ◽  
Ammonium Molybdate ◽  
Active Components ◽  
Model Set ◽  
Cobalt Dichloride ◽  
Set Up ◽  
Electron Microanalysis ◽  
Kinetics Of

Adsorption data for the impregnation of alumina with an aqueous solution of cobalt dichloride and ammonium molybdate were treated in terms of the Langmuir adsorption isotherm and compared with a mathematical model set up to describe the kinetics of simultaneous impregnation of a support by two components. The effective diffusion coefficients of the two components at 25 °C in a cylindrical particle of alumina were obtained. The validity of the model used was verified qualitatively by comparing the numerical results with the experimental time dependent concentration profiles of the active components in a catalyst particle, measured by electron microanalysis technique.

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