Theory of a simple and efficient method for the axial optical vortex beam synthesis from a quasi-plane wave

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2009
• Main Author: Khoroshun, A.N.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2009
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118867
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Theory of a simple and efficient method for the axial optical vortex beam synthesis from a quasi-plane wave / A.N. Khoroshun // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2009. — Т. 12, № 3. — С. 227-233. — Бібліогр.: 13 назв. — англ.

The diffraction light field is studied by the numerical calculations of
 Kirchhoff-Fresnel integral and Fourier analysis. Based on combination of these methods,
 the condition of an axial optical vortex generation in a quasi-plane wave by the special
 case of a phase addition in the cross-section of a beam is founded. Amplitude and phase
 structures of the beam synthesized like a singular one are analyzed using computer
 simulation. The coefficient of conversion of an axial optical vortex beam from the quasiplane
 wave is defined by the ratio of intensities and reaches 65 % in the far field
 diffraction zone. Offered are a simple original technique for the experimental realization
 of the necessary phase addition to the wave for the axial optical vortex beam synthesis
 and a light “lock” for trapping the absorbing microparticles by using two inclined
 mirrors.