High-particle-density flowmetry by use of a SLD

1990 ◽  
Author(s):  
Yoh Imai ◽  
Hiroshi Fujii
Keyword(s):  
Particle Density ◽  
High Particle ◽  
High Particle Density

High-Particle-Density YAG:Ce Phosphor Coating for High Power Laser Lighting

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Yi Yang ◽  
Tao Long ◽  
Songlin Zhuang ◽  
Lai Wang ◽  
Yi Luo
Keyword(s):  
Single Crystal ◽  
Power Density ◽  
Yttrium Aluminum Garnet ◽  
Particle Density ◽  
Spreading Effect ◽  
Central Intensity ◽  
High Particle ◽  
Al2o3 Composite ◽  
Phosphor Coating ◽  
High Particle Density

Abstract Inorganic Ce doped yttrium aluminum garnet (YAG:Ce) fluorescent plates based on various manufacturing methods have been studied in recent years for laser lighting systems. A laser lighting optical system is designed to generate high central intensity beam, and light spreading effect for both YAG single crystal and YAG/Al2O3 composite is investigated. YAG single crystal and YAG/Al2O3 composite lose 50.8% and 25.9% of their light power from central pumping area, respectively, resulting in proportional decrease in central intensity. To solve this problem, a low-cost YAG:Ce high-particle-density phosphor coating (HPD-PC) was prepared for Etendue-limited applications. With only 8.5% of light spreading, under 47.7 W/mm2 pumping power density, YAG HPD-PC emits 1880 lm with the conversion efficiency of 157 lm/W. YAG HPD-PC also could work well under power density more than 100 W/mm2.

Superfluidité excitonique dans Cu2O

1993 ◽  
Vol 71 (3-4) ◽  
pp. 165-167 ◽  
Author(s):  
A. Mysyrowicz ◽  
E. Fortin
Keyword(s):  
Low Temperature ◽  
Transit Time ◽  
Velocity Dispersion ◽  
Particle Density ◽  
Photovoltaic Effect ◽  
High Particle ◽  
Sudden Reduction ◽  
High Particle Density

The transit time of excitons through several millimeters of Cu2O is measured by the photovoltaic effect. A sudden reduction of velocity dispersion at high particle density and low temperature is attributed to superfluid excitonic motion.

scholarly journals Assembly along lines in boundary-driven dynamical system

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kulveer Singh ◽  
Yitzhak Rabin
Keyword(s):  
Dynamical System ◽  
Particle Density ◽  
Outer Boundary ◽  
Nearest Neighbors ◽  
Three Dimensions ◽  
Single Line ◽  
Repeated Application ◽  
High Particle ◽  
Local Assembly ◽  
High Particle Density

AbstractWe introduce a simple dynamical rule in which each particle locates a particle that is farthest from it and moves towards it. Repeated application of this algorithm results in the formation of unusual dynamical patterns: during the process of assembly the system self-organizes into slices of low particle density separated by lines of increasingly high particle density along which most particles move. As the process proceeds, pairs of lines meet and merge with each other until a single line remains and particles move along it towards the zone of assembly. We show that this pattern is governed by particles (attractors) situated on the instantaneous outer boundary of the system and that both in two and in three dimensions the lines are formed by zigzag motion of a particle towards a pair of nearly equidistant attractors. This novel line-dominated assembly is very different from the local assembly in which particles that move towards their nearest neighbors produce point-like clusters that coalesce into new point-like clusters, etc.

3D localization of high particle density images using sparse recovery

2015 ◽  
Vol 54 (26) ◽  
pp. 7859 ◽  
Author(s):  
Saiwen Zhang ◽  
Danni Chen ◽  
Hanben Niu
Keyword(s):  
Particle Density ◽  
Sparse Recovery ◽  
High Particle ◽  
3D Localization ◽  
High Particle Density

Synthesis and characterization of hybrid CdS/MEH-PPV nanocomposites for photovoltaic applications

2011 ◽  
Vol 1322 ◽  
Author(s):  
Anna M. Laera ◽  
Vincenzo Resta ◽  
Emanuela Piscopiello ◽  
Monica Schioppa ◽  
Leander Tapfer
Keyword(s):  
Annealing Temperature ◽  
Particle Density ◽  
Semiconductor Nanocrystals ◽  
Semiconducting Polymer ◽  
High Particle ◽  
Photovoltaic Applications ◽  
The Matrix ◽  
Synthesis Procedure ◽  
Very High

ABSTRACTInorganic-organic nanocomposites, with II-VI or III-V semiconductor nanocrystals (NCs) embedded in semiconducting polymer matrix, are very promising materials for photovoltaic applications.Here, we present an effective and easy synthesis procedure to obtain a hybrid nanocomposite with CdS NCs dispersed in poly[2-methoxy-5-(2-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) conjugated polymer. CdS NCs are synthesized directly within the matrix through the decomposition of a suitable unimolecular precursor dispersed homogeneously in the polymer.We show that CdS NCs are formed at low annealing temperature avoiding structural damages and without affecting the functional properties of the MEH-PPV polymer. The NCs diameter ranges between 1.5nm and 4nm depending on the annealing temperature. In addition, no coalescence phenomena of CdS NCs were noticed in TEM observations even at very high particle density (40 wt %).

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