Differential Dynamic Polarization of Fluorine and Hydrogen Nuclei

1965 ◽  
Vol 15 (7) ◽  
pp. 281-282 ◽  
Author(s):  
Don D. Thompson ◽  
Edward H. Poindexter
Keyword(s):  
Dynamic Polarization

EPR studies on fluorocarbon microspheres. Dynamic polarization of fluorine nuclei and adsorbed He3

1984 ◽  
Vol 45 (6) ◽  
pp. 1033-1038 ◽  
Author(s):  
M. Chapellier ◽  
L. Sniadower ◽  
G. Dreyfus ◽  
H. Alloul ◽  
J. Cowen
Keyword(s):  
Dynamic Polarization

scholarly journals Electrical tuning of the polarization state of light using graphene-integrated anisotropic metasurfaces

2017 ◽  
Vol 375 (2090) ◽  
pp. 20160061 ◽  
Author(s):  
Shourya Dutta-Gupta ◽  
Nima Dabidian ◽  
Iskandar Kholmanov ◽  
Mikhail A. Belkin ◽  
Gennady Shvets
Keyword(s):  
Tilt Angle ◽  
Incident Light ◽  
Polarization State ◽  
Dynamic Control ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Dynamic Polarization ◽  
Reflected Light ◽  
Electro Optic ◽  
The Way

Plasmonic metasurfaces have been employed for moulding the flow of transmitted and reflected light, thereby enabling numerous applications that benefit from their ultra-thin sub-wavelength format. Their appeal is further enhanced by the incorporation of active electro-optic elements, paving the way for dynamic control of light's properties. In this paper, we realize a dynamic polarization state generator using a graphene-integrated anisotropic metasurface (GIAM) that converts the linear polarization of the incident light into an elliptical one. This is accomplished by using an anisotropic metasurface with two principal polarization axes, one of which possesses a Fano-type resonance. A gate-controlled single-layer graphene integrated with the metasurface was employed as an electro-optic element controlling the phase and intensity of light polarized along the resonant axis of the GIAM. When the incident light is polarized at an angle to the resonant axis of the metasurface, the ellipticity of the reflected light can be dynamically controlled by the application of a gate voltage. Thus accomplished dynamic polarization control is experimentally demonstrated and characterized by measuring the Stokes polarization parameters. Large changes of the ellipticity and the tilt angle of the polarization ellipse are observed. Our measurements show that the tilt angle can be changed from positive values through zero to negative values while keeping the ellipticity constant, potentially paving the way to rapid ellipsometry and other characterization techniques requiring fast polarization shifting. This article is part of the themed issue ‘New horizons for nanophotonics’.

Dynamic polarization echoes in metallic powders

1980 ◽  
Vol 22 (11) ◽  
pp. 5092-5109 ◽  
Author(s):  
F. Tsuruoka ◽  
K. Kajimura
Keyword(s):  
Dynamic Polarization ◽  
Metallic Powders

A dynamic polarization potential for heavy-ion scattering

1977 ◽  
Vol 291 (1) ◽  
pp. 183-205 ◽  
Author(s):  
W.G. Love ◽  
T. Terasawa ◽  
G.R. Satchler
Keyword(s):  
Heavy Ion ◽  
Polarization Potential ◽  
Dynamic Polarization ◽  
Ion Scattering ◽  
Heavy Ion Scattering

Studying the heavy-ion dynamic polarization potential

1989 ◽  
Vol 494 (1) ◽  
pp. 123-156 ◽  
Author(s):  
R.S. Mackintosh ◽  
S.G. Cooper
Keyword(s):  
Heavy Ion ◽  
Polarization Potential ◽  
Dynamic Polarization

Systematische Untersuchungen der dynamischen Protonenpolarisation in organischen Kristallen mit eingebauten Radikalzentren

1969 ◽  
Vol 24 (10) ◽  
pp. 1532-1541
Author(s):  
K. Grude ◽  
W. Müller-Warmuth
Keyword(s):  
Magnetic Field ◽  
Enhancement Factor ◽  
Electronic Transitions ◽  
Dynamic Polarization ◽  
Spin Temperature ◽  
Field Range ◽  
Stable Free Radical ◽  
Organic Systems ◽  
High Proton ◽  
Paramagnetic Centres

Abstract In order to produce high proton polarizations, several organic hydrocarbons have been doped with stable free radical molecules. Through the "solid state effect" a part of the electronic polarization in a magnetic field has been transferred to the protons of these materials. For this purpose, the "forbidden electronic transitions" of the combined electron-proton system have been saturated at about 37 GHz. The enhancement factor of the dynamic proton polarization was measured by pulsed NMR at 56 MHz. In phenanthrene with about 4 w.% bis-diphenylen-phenylallyl (BPA) a maximum polarization of 10.5% has been obtained at 1.5 °K and 13 200 gauss. This value may be increased by extending the temperature and magnetic field range. Systematic investigations in numerous organic systems have been carried out and have particularly yielded data on the frequency dependence and on the saturation behaviour of the enhancement curves. - Spin temperature theories of dynamic polarization have been considered to explain the results and to find possibilities for improving the polarization. In particular, the exchange interaction of the radicals and the distinction between relaxing and polarizing paramagnetic centres had to be taken into account.

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