Optical Activity of Nascent Twisted Allene and its Induction by Circularly Polarized Light

1985 ◽  
Vol 26 (2) ◽  
pp. 166-173 ◽  
Author(s):  
Ying-Nan Chiu
Keyword(s):  
Optical Activity ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized

scholarly journals Engineering Optical Activity of Semiconductor Nanocrystals via Ion Doping

Nanophotonics ◽  
2016 ◽  
Vol 5 (4) ◽  
pp. 573-578 ◽  
Author(s):  
Nikita V. Tepliakov ◽  
Anvar S. Baimuratov ◽  
Yurii K. Gun’ko ◽  
Alexander V. Baranov ◽  
Anatoly V. Fedorov ◽  
...  
Keyword(s):  
Optical Activity ◽  
Semiconductor Nanocrystals ◽  
Polarized Light ◽  
Inorganic Nanoparticles ◽  
Chiral Molecules ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Optical Wavelength ◽  
Ion Doping ◽  
Ionic Impurities

AbstractControlling the strength of enantioselective interaction of chiral inorganic nanoparticles with circularly polarized light is an intrinsically interesting subject of contemporary nanophotonics. This interaction is relatively weak, because the chirality scale of nanoparticles is much smaller than the optical wavelength. Here we theoretically demonstrate that ion doping provides a powerful tool of engineering and enhances optical activity of semiconductor nanocrystals. We show that by carefully positioning ionic impurities inside the nanocrystals, one can maximize the rotatory strengths of intraband optical transitions, and make them 100 times larger than the typical rotatory strengths of small chiral molecules.

Electric-field-induced differential scattering of right and left circularly polarized light

1975 ◽  
Vol 345 (1642) ◽  
pp. 365-377 ◽  
Keyword(s):  
Electric Field ◽  
Optical Activity ◽  
Electromagnetic Waves ◽  
Polarized Light ◽  
Static Electric Field ◽  
Circularly Polarized Light ◽  
Active Systems ◽  
Circularly Polarized ◽  
Dipolar Molecules ◽  
The Difference

The differential scattering of right and left circularly polarized light is a manifestation of optical activity. Both naturally optically active systems and fluids in a magnetic field parallel to the direction of propagation exhibit differential scattering. Although there is no electric analogue of Faraday’s effect, a static electric field applied to a fluid perpendicular to the direction of propagation induces a difference in the scattered intensities of right and left circularly polarized light. The difference is linear in the field strength. It is determined by the effect of the field on the polarizabilities producing optical activity and is present in all matter, including monatomic gases. The classical theory of the scattering of electromagnetic waves is used in a formulation of the general theory of light scattering in an electric field. Results are given for some particular symmetries, including spherical, tetrahedral and dipolar molecules, and estimates of the magnitude of the effect are made.

scholarly journals Optical Activity Developed by Preferential Racemization of One Enantiomer in Racemic Cr(III) (ox)33- Induced by Irradiation with Circularly Polarized Light.

1970 ◽  
Vol 24 ◽  
pp. 349-351 ◽  
Author(s):  
Bengt Nordén ◽  
Björn Lindman ◽  
Charles Larsen ◽  
Per Halfdan Nielsen ◽  
S. E. Rasmussen ◽  
...  
Keyword(s):  
Optical Activity ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized

scholarly journals Photochemically Induced Circular Dichroism of Semiconductor Nanocrystals-=SUP=-*-=/SUP=-

2020 ◽  
Vol 128 (8) ◽  
pp. 1192
Author(s):  
F.M. Safin ◽  
V.G. Maslov ◽  
A.Y. Dubavik ◽  
E.P. Kolesova ◽  
A.V. Baranov ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Optical Activity ◽  
Semiconductor Nanocrystals ◽  
Polarized Light ◽  
Induced Circular Dichroism ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Quantum Rods ◽  
Reaction Proceeds ◽  
Circular Dichroïsm

Here, we report an investigation of optical activity which was photochemically induced by illumination of QRs and DiRs with circularly polarized light; the photo-induced circular dichroism was quantitatively estimated, and it was shown that the photo-induced chemical reaction proceeds selectively, depending on the handedness of circularly polarized light. Keywords: chirality, optical activity, circular dichroism, photoinduced circular dichroism, semiconductor nanocrystals, quantum rods, quantum dot-in-rods.

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.

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