Transformation of the orbital and spin parts of the angular momentum of laser beams in the course of their interaction in nonlinear gyrotropic media in the framework of classical electrodynamics

2020 ◽  
Author(s):  
V.A. Makarov ◽  
V.A. Dukov ◽  
K.S. Grigoriev ◽  
V.M. Petnikova
Keyword(s):  
Angular Momentum ◽  
Laser Beams ◽  
Classical Electrodynamics ◽  
Gyrotropic Media

scholarly journals Astigmatic laser beams with a large orbital angular momentum

2018 ◽  
Vol 26 (1) ◽  
pp. 141 ◽  
Author(s):  
Victor V. Kotlyar ◽  
Alexey A. Kovalev ◽  
Alexey P. Porfirev
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Laser Beams

Microobject manipulations using laser beams with nonzero orbital angular momentum

Laser Physics ◽  
2006 ◽  
Vol 16 (5) ◽  
pp. 842-848 ◽  
Author(s):  
E. G. Abramochkin ◽  
S. P. Kotova ◽  
A. V. Korobtsov ◽  
N. N. Losevsky ◽  
A. M. Mayorova ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Laser Beams

Classical electrodynamics of spinning particles

1984 ◽  
Vol 62 (10) ◽  
pp. 943-947
Author(s):  
Bruce Hoeneisen
Keyword(s):  
Electromagnetic Field ◽  
Angular Momentum ◽  
Wave Equations ◽  
Dipole Moments ◽  
Equations Of Motion ◽  
Radiation Reaction ◽  
Classical Electrodynamics ◽  
Electric Dipole Moments ◽  
Gauge Invariant ◽  
Intrinsic Angular Momentum

We consider particles with mass, charge, intrinsic magnetic and electric dipole moments, and intrinsic angular momentum in interaction with a classical electromagnetic field. From this action we derive the equations of motion of the position and intrinsic angular momentum of the particle including the radiation reaction, the wave equations of the fields, the current density, and the energy-momentum and angular momentum of the system. The theory is covariant with respect to the general Lorentz group, is gauge invariant, and contains no divergent integrals.

scholarly journals Asymmetric hypergeometric laser beams

2019 ◽  
Vol 43 (5) ◽  
pp. 735-740
Author(s):  
V.V. Kotlyar ◽  
A.A. Kovalev ◽  
E.G. Abramochkin
Keyword(s):  
Exact Solution ◽  
Angular Momentum ◽  
Hypergeometric Function ◽  
Orbital Angular Momentum ◽  
Topological Charge ◽  
Optical Axis ◽  
Type Equation ◽  
Laser Beams ◽  
Propagation Equation ◽  
Degenerate Hypergeometric Function

Here we study asymmetric Kummer beams (aK-beams) with their scalar complex amplitude being proportional to the Kummer function (a degenerate hypergeometric function). These beams are an exact solution of the paraxial propagation equation (Schrödinger-type equation) and obtained from the conventional symmetric hypergeometric beams by a complex shift of the transverse coordinates. On propagation, the aK-beams change their intensity weakly and rotate around the optical axis. These beams are an example of vortex laser beams with a fractional orbital angular momentum (OAM), which depends on four parameters: the vortex topological charge, the shift magnitude, the logarithmic axicon parameter and the degree of the radial factor. Changing these parameters, it is possible to control the beam OAM, either continuously increasing or decreasing it.

scholarly journals Comparison of Different Forms for the “Spin” and “Orbital” Components of the Angular Momentum of Light

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
A. M. Stewart
Keyword(s):  
Electromagnetic Field ◽  
Angular Momentum ◽  
Inertial Frame ◽  
Classical Electrodynamics

We compare three attempts that have been made to decompose the angular momentum of the electromagnetic field into components of an “orbital” and “spin” nature. All three expressions are different, and there seems to be no reason to prefer one to another. It appears, on the basis of classical electrodynamics, that there is no unique way of decomposing the angular momentum of the electromagnetic field into orbital and spin components, even in a fixed inertial frame.

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