Terahertz polarization rotator based on silicon asymmetrical structure

2021 ◽  
Author(s):  
Wentao Deng ◽  
Liao Chen ◽  
Yu Yu ◽  
Xiaojun Wu ◽  
Xinliang Zhang
Keyword(s):  
Polarization Rotator ◽  
Asymmetrical Structure

Analysis of the Mechanism of Microtubule Dynamic Instability Using a UV Microbeam to Sever Elongating Microtubules

1988 ◽  
Vol 46 ◽  
pp. 122-123
Author(s):  
R.A Walker ◽  
S. Inoue ◽  
E.D. Salmon
Keyword(s):  
Dynamic Instability ◽  
Microtubule Dynamic ◽  
Gtp Hydrolysis ◽  
Abrupt Transition ◽  
Microtubule Associated Proteins ◽  
Asymmetrical Structure ◽  
Associated Proteins

Microtubules polymerized in vitro from tubulin purified free of microtubule-associated proteins exhibit dynamic instability (1,2,3). Free microtubule ends exist in persistent phases of elongation or rapid shortening with infrequent, but, abrupt transitions between these phases. The abrupt transition from elongation to rapid shortening is termed catastrophe and the abrupt transition from rapid shortening to elongation is termed rescue. A microtubule is an asymmetrical structure. The plus end grows faster than the minus end. The frequency of catastrophe of the plus end is somewhat greater than the minus end, while the frequency of rescue of the plus end in much lower than for the minus end (4).The mechanism of catastrophe is controversial, but for both the plus and minus microtubule ends, catastrophe is thought to be dependent on GTP hydrolysis. Microtubule elongation occurs by the association of tubulin-GTP subunits to the growing end. Sometime after incorporation into an elongating microtubule end, the GTP is hydrolyzed to GDP, yielding a core of tubulin-GDP capped by tubulin-GTP (“GTP-cap”).

Efficient, compact, and robust GeOI-based photonic polarization rotator in the 2 μm waveband

2021 ◽  
pp. 127145
Author(s):  
Danfeng Zhu ◽  
Han Ye ◽  
Yumin Liu ◽  
Jing Li ◽  
Zhongyuan Yu
Keyword(s):  
Polarization Rotator

scholarly journals Wideband Transmissive Polarization Rotator with In-Band Notches Enabling Multiband Operation

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Ahmed Abdelmottaleb Omar ◽  
Abdelhady Mahmoud ◽  
Jaehong Choi ◽  
Wonbin Hong
Keyword(s):  
Polarization Rotator

Laser Spectrofluorimetry of Chlorophylls

1974 ◽  
Vol 52 (22) ◽  
pp. 3723-3727 ◽  
Author(s):  
Roger M. Leblanc ◽  
Geneviève Galinier ◽  
Alain Tessier ◽  
Lise Lemieux
Keyword(s):  
Chlorophyll A ◽  
Emission Spectra ◽  
Polarization Rotator ◽  
Excitation Beam ◽  
Solid States ◽  
Set Up

A device has been set up to determine quantitatively the weak fluorescence intensities of pigment molecules. It consists of a laser spectrofluorimeter. The excitation beam can be produced with either a He/Cd laser (441.6 nm) or a He/Ne laser (632.8 nm). This system allows us to detect the fluorescence of dilute chlorophyll a or b solutions of the order of 10−12 mol/l. This sensitivity also permits the study of the emission spectra from chlorophyll in monomolecular or solid states, and since a polarization rotator has been incorporated into our apparatus, one may presume some possible orientation of the molecules.

Ultracompact Polarization Rotator Based on Liquid Crystal Channel on Silicon

2017 ◽  
Vol 35 (11) ◽  
pp. 2190-2199 ◽  
Author(s):  
Mohamed Farhat O. Hameed ◽  
Firas Faeq K. Hussain ◽  
Salah S. A. Obayya
Keyword(s):  
Liquid Crystal ◽  
Polarization Rotator

90° Polarization rotator and antireflector using meanderline chiral metamaterials: Analytical and numerical approach

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 5587-5592 ◽  
Author(s):  
Sengul Gonulal ◽  
Muharrem Karaaslan ◽  
Emin Unal ◽  
Kemal Delihacioglu ◽  
Furkan Dincer ◽  
...  
Keyword(s):  
Numerical Approach ◽  
Polarization Rotator ◽  
Chiral Metamaterials
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