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Formulation of the twisted-light-matter interaction at the phase singularity: Beams with strong magnetic fields
(American Physical Society, 2017-01)
The formulation of the interaction of matter with singular light fields needs special care. In a recent article [G. F. Quinteiro, Phys. Rev. A 91, 033808 (2015)PLRAAN1050-294710.1103/PhysRevA.91.033808] we have shown that ...
Initiation of CMEs: the role of magnetic twist
(Elsevier, 2000-11)
Recent multiwavelength observations, modelling results and theoretical developments indicate the importance of twisted magnetic configurations in solar active regions (ARs) in the initiation of coronal mass ejections (CMEs). ...
Twisted Flux Tube Emergence Evidenced in Longitudinal Magnetograms: Magnetic Tongues
(Springer, 2011-05)
Bipolar active regions (ARs) are thought to be formed by twisted flux tubes, as the presence of such twist is theoretically required for a cohesive rise through the whole convective zone. We use longitudinal magnetograms ...
Magnetic-optical transitions induced by twisted light in quantum dots
(Institute of Physics Publishing, 2017-10)
It has been theoretically predicted that light carrying orbital angular momentum, or twisted light, can be tuned to have a strong magnetic-field component at optical frequencies. We here consider the interaction of these ...
Magnetic twist profile inside magnetic clouds derived with a superposed epoch analysis
(EDP Sciences, 2020-03)
Context. Magnetic clouds (MCs) are large-scale interplanetary transient structures in the heliosphere that travel from the Sun into the interplanetary medium. The internal magnetic field lines inside the MCs are twisted, ...
Active-region twist derived from magnetic tongues and linear force-free extrapolations
(Springer, 2015-12)
The main aim of this study is to compare the amount of twist present in emerging active regions (ARs) from photospheric and coronal data. We use linear force-free field models of the observed coronal structure of ARs to ...
Formulation of the twisted-light–matter interaction at the phase singularity: The twisted-light gauge
(American Physical Society, 2015-03)
Twisted light is light carrying orbital angular momentum. The profile of such a beam is a ring-like structure with a node at the beam axis, where a phase singularity exists. Due to the strong spatial inhomogeneity the ...
Electric currents induced by twisted light in quantum rings
(Optical Society of America, 2009-10)
We theoretically investigate the generation of electric currents in quantum rings resulting from the optical excitation with twisted light. Our model describes the kinetics of electrons in a two-band model of a semiconductor-based ...
Magnetic twist and writhe of active regions: On the origin of deformed flux tubes
(EDP Sciences, 2003-12)
We study the long term evolution of a set of 22 bipolar active regions (ARs) in which the main photospheric polarities are seen to rotate one around the other during several solar rotations. We first show that differential ...
Efeitos de campos externos na reorientação molecular de cristais líquidos nemáticos twist-bendEffects of external fields on the molecular reorientation of twist-bend nematic liquid crystals
(Universidade Estadual de MaringáBrasilPrograma de Pós-Graduação em FísicaUEMMaringá, PRCentro de Ciências Exatas, 2018)