Victor V. Kotlyar, Alexey A. Kovalev, Anton G. Nalimov

Topological Charge of Optical Vortices

• Gebundenes Buch

Produktbeschreibung

This book is devoted to the consideration of unusual laser beams - vortex or singular beams. It contains many numerical examples, which clearly show how the phase of optical vortices changes during propagation in free space, and that the topological charge is preserved.

Topological Charge of Optical Vortices shows that the topological charge of an optical vortex is equal to the number of screw dislocations or the number of phase singularities in the beam cross-section. A single approach is used for the entire book: based on M. Berry's formula. It is shown that phase singularities during beam propagation can be displaced to infinity at a speed greater than the speed of light. The uniqueness of the book is that the calculation of the topological charge for scalar light fields is extended to vector fields and is used to calculate the Poincare-Hopf singularity index for vector fields with inhomogeneous linear polarization with V-points and for the singularity index of vector fields with inhomogeneous elliptical polarization with C-points and C- lines.

The book is written for opticians, and graduate students interested in an interesting section of optics - singular optics. It will also be of interest to scientists and researchers who are interested in modern optics. In order to understand the content of the book, it is enough to know paraxial optics (Fourier optics) and be able to calculate integrals.

Produktdetails

• Verlag: CRC Press / Taylor & Francis
• Seitenzahl: 320
• Englisch
• Abmessung: 21mm x 156mm x 234mm
• Gewicht: 591g
• ISBN-13: 9781032345536
• Artikelnr.: 65614080

Inhaltsangabe

1. Topological charge of superposition of vortices. Conservation of topological charge. 2. Evolution of an optical vortex with an initial fractional topological charge. 3. Topological charge superposition of only two Laguerre-Gaussian or Bessel-Gaussian beams with different parameters. 4. Optical vortex beams with an infinite topological charge. 5. Transformation of an edge dislocation of a wavefront into an optical vortex. 6. Fourier-invariant and structurally stable optical vortex beams. 7. Topological charge of polarization singularities. 8. Conclusion.

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1. Topological charge of superposition of vortices. Conservation of
topological charge. 2. Evolution of an optical vortex with an initial
fractional topological charge. 3. Topological charge superposition of only
two Laguerre-Gaussian or Bessel-Gaussian beams with different parameters.
4. Optical vortex beams with an infinite topological charge. 5.
Transformation of an edge dislocation of a wavefront into an optical
vortex. 6. Fourier-invariant and structurally stable optical vortex beams.
7. Topological charge of polarization singularities. 8. Conclusion.