Photocontrol of selective light reflection by oblique helicoidal cholesteric

2021 ◽  
Author(s):  
Kamal Thapa ◽  
Olena Iadlovska ◽  
Hari Bisoyi ◽  
Daniel A. Paterson ◽  
John M. Storey ◽  
...  
Keyword(s):  
Light Reflection

scholarly journals Surface Texturing of Si with Periodically Arrayed Oblique Nanopillars to Achieve Antireflection

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 380
Author(s):  
Jun-Hyun Kim ◽  
Sanghyun You ◽  
Chang-Koo Kim
Keyword(s):  
Aspect Ratio ◽  
Plasma Etching ◽  
Surface Texturing ◽  
Light Reflection ◽  
Si Substrate ◽  
Weighted Mean ◽  
Optical Reflectance ◽  
Si Substrates ◽  
Aspect Ratios ◽  
Shadowing Effect

Si surfaces were texturized with periodically arrayed oblique nanopillars using slanted plasma etching, and their optical reflectance was measured. The weighted mean reflectance (Rw) of the nanopillar-arrayed Si substrate decreased monotonically with increasing angles of the nanopillars. This may have resulted from the increase in the aspect ratio of the trenches between the nanopillars at oblique angles due to the shadowing effect. When the aspect ratios of the trenches between the nanopillars at 0° (vertical) and 40° (oblique) were equal, the Rw of the Si substrates arrayed with nanopillars at 40° was lower than that at 0°. This study suggests that surface texturing of Si with oblique nanopillars reduces light reflection compared to using a conventional array of vertical nanopillars.

Numerical Simulation & Experimental Investigation of SMT Laser Microsoldering Thermal Process

1991 ◽  
Vol 226 ◽  
Author(s):  
Wang Chunqing ◽  
Qian Yiyu ◽  
Jiang Yihong
Keyword(s):  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Experimental Investigation ◽  
Thermal Process ◽  
Light Wave ◽  
Light Reflection ◽  
Lead Wire ◽  
Wire Surface ◽  
Conductivity Variation ◽  
Thermal Conductivity Variation

AbstractIn this paper,a numerical simulation of thermal process in the SMT laser microsoldering joint has been developed, in which, the influence on thermal process of the factors such as the thermal conductivity variation of solder with temperature, light reflection coefficient of the lead wire surface, and heat exchange on the surface of SMT materials all have been considered. In order to carry this numerical calculation practice and prove it's results,the reflexive characteristic of light wave to the SMT materials has been gauged,and the dynamic temperature process of laser microjoint has been measured by a new experimental method which was invented by the authors.The results of numerical simulation have been borne out by the tests, and the influences of heating parameters on thermal process has been analysed in this paper.The conclusions will be advantageous to the further study of the microjoint quality control in the SMT laser microsoldering.

A Combination of Selective Light Reflection and Fluorescence Modulation in a Cholesteric Polymer Matrix

2005 ◽  
Vol 26 (3) ◽  
pp. 177-182 ◽  
Author(s):  
Dasha Medvedeva ◽  
Alexey Bobrovsky ◽  
Natalia Boiko ◽  
Valery Shibaev ◽  
Igor Zavarzin ◽  
...  
Keyword(s):  
Polymer Matrix ◽  
Light Reflection ◽  
Fluorescence Modulation

Optical fiber hydrogen sensor based on light reflection and a palladium-sliver thin film

2011 ◽  
Vol 7 (4) ◽  
pp. 249-252 ◽  
Author(s):  
Lu-jun Cui ◽  
Hui-chao Shang ◽  
Gang Zhang ◽  
Ze-xiang Zhao ◽  
Jun Zhou
Keyword(s):  
Thin Film ◽  
Optical Fiber ◽  
Hydrogen Sensor ◽  
Light Reflection

A fast and accurate light reflection model

1992 ◽  
Vol 26 (2) ◽  
pp. 253-254 ◽  
Author(s):  
Xiao D. He ◽  
Patrick O. Heynen ◽  
Richard L. Phillips ◽  
Kenneth E. Torrance ◽  
David H. Salesin ◽  
...  
Keyword(s):  
Light Reflection ◽  
Reflection Model

Resonant Light Reflection in the 1/3 Laughlin State

JETP Letters ◽  
2021 ◽  
Vol 114 (7) ◽  
pp. 412-416
Author(s):  
A. S. Zhuravlev ◽  
L. V. Kulik ◽  
L. I. Musina ◽  
E. I. Belozerov ◽  
A. A. Zagitova ◽  
...  
Keyword(s):  
Light Reflection
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