Optical vortex materials processing enables the fabrication of chiral structures (Conference Presentation)

2018 ◽  
Author(s):  
Takashige Omatsu
Keyword(s):  
Optical Vortex ◽  
Materials Processing ◽  
Chiral Structures

Silicon (111) chiral structures fabricated by illumination of optical vortex

2020 ◽  
Author(s):  
Ablimit Ablez ◽  
Katsuhiko Miyamoto ◽  
Ryuji Morita ◽  
Takashige Omatsu
Keyword(s):  
Optical Vortex ◽  
Chiral Structures

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

CHANG-LIN TIEN'S CONTRIBUTIONS TO LASER MATERIALS PROCESSING

2005 ◽  
Vol 14 (14) ◽  
pp. 411-418
Author(s):  
T. Qiu ◽  
Jon P. Longtin ◽  
L. M. Phinney
Keyword(s):  
Materials Processing ◽  
Laser Materials ◽  
Laser Materials Processing
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