Buried Concentration Profiles for Optical Waveguides by One-Step Electro-Diffusion Process: Theoretical Analysis

1991 ◽  
Vol 228 ◽  
Author(s):  
Xiaoming Li ◽  
Paul F. Johnson
Keyword(s):  
Theoretical Analysis ◽  
Electric Field ◽  
Optical Waveguides ◽  
Diffusion Processes ◽  
Silver Ions ◽  
Point Of View ◽  
Concentration Profiles ◽  
Step Process ◽  
Practical Operation ◽  
One Step

IntroductionIn recent years, a two-step electric field assisted diffusion or ion-exchange technique has been extensively studied for producing buried concentration profiles in glass [1,2,3], polymer [4,5], electrooptic and semiconducting [6,7] substrate materials to fabricate buried optical waveguide devices. The technique contains two separate diffusion processes and is quite complicated, cost and time consuming. In addition, theoretical analysis of the technique is too complicated to be used for calculating and tailoring concentration profiles. Many efforts have been made to pursue a one-step process for producing buried profiles. Very recently, a novel one-step technique [8] involving electric field assisted diffusion of silver ions into glass from molten AgNO3 bath with decaying silver concentration has been developed to produce buried Ag+ concentration profiles in glass substrate. The new technique is, from the practical operation point of view, relatively simple and is a significant improvement over the conventional two-step process.

Timber Auctions in the Context of the Modern Auction Theory

2007 ◽  
pp. 86-94
Author(s):  
A. Manakov
Keyword(s):  
Theoretical Analysis ◽  
Auction Theory ◽  
Point Of View ◽  
Theoretical Point ◽  
English Auction ◽  
Analysis And Evaluation

The article provides theoretical analysis and evaluation of the timber auctions reforms in Russia. The author shows that the mechanism of the "combined auctions", which functioned until recently, is more appropriate from the theoretical point of view (and from the point of view of the Russian practice) as compared to the officially approved format of the English auction.

Functionalized aluminum-catalyzed silicon nanowire formation and radial junction photovoltaic devices

Nanoscale ◽  
2021 ◽  
Author(s):  
Wipakorn Jevasuwan ◽  
Naoki Fukata
Keyword(s):  
Surface Modification ◽  
Solar Cells ◽  
Surface Defects ◽  
Silicon Nanowire ◽  
Photovoltaic Devices ◽  
Step Process ◽  
One Step ◽  
Length Reduction

Vertical Al-catalyzed SiNW arrays with shaped surfaces were synthesized by a one-step process and NW-based solar cells were demonstrated with optimized NW surface defects through surface modification and length reduction.

One-step synthesis of silver nanoplates with high aspect ratios: using coordination of silver ions to enhance lateral growth

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 95768-95773 ◽  
Author(s):  
Young Min Park ◽  
Byung Gon Lee ◽  
Jong-Il Weon ◽  
Mun Ho Kim
Keyword(s):  
Silver Ions ◽  
Lateral Growth ◽  
Silver Nanoplates ◽  
Aspect Ratios ◽  
One Step

A coordination-based strategy was employed to produce Ag nanoplates with high aspect ratios. Ag nanoplates were synthesized in the presence of acetonitrile, which served both as the co-solvent and as the ligand to form complexes with the Ag+ ions.

MgO nanoparticles synthesized starting from an innovative one-step process

2017 ◽  
Vol 101 (4) ◽  
pp. 1780-1789 ◽  
Author(s):  
Giuliana Taglieri ◽  
Valeria Daniele ◽  
Claudia Mondelli
Keyword(s):  
Mgo Nanoparticles ◽  
Step Process ◽  
One Step

Laser-assisted controlled in-diffusion processes for preparation of optical waveguides and ultrashallow semiconductor junctions

1995 ◽  
Author(s):  
Maria Dinescu ◽  
N. Chitica ◽  
Adriana Lita ◽  
D. Pantelica ◽  
B. Bucur ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Diffusion Processes

Note on Interference Effects in Two-Step Reaction Processes

1975 ◽  
Vol 53 (23) ◽  
pp. 2590-2592
Author(s):  
J. Cejpek ◽  
J. Dobeš
Keyword(s):  
Perturbation Theory ◽  
Point Of View ◽  
Order Perturbation ◽  
Interference Effects ◽  
Qualitative Explanation ◽  
First Order ◽  
One Step ◽  
Step Transition ◽  
Reaction Processes ◽  
First Order Perturbation

The reaction processes in which a one-step transition is forbidden are analyzed from the point of view of the first order perturbation theory. The interference between two competing two-step reaction paths is found to be always constructive. A qualitative explanation of the experimentally observed reaction intensities is presented.

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