Hyperbolic-cosine-Gaussian beam focusing with a non-spiral vortex and a spiral vortex

Xiumin Gao; Jian Wang; Lingling Sun; Songlin Zhuang

doi:10.1117/12.807026

28 January 2009 Hyperbolic-cosine-Gaussian beam focusing with a non-spiral vortex and a spiral vortex

Xiumin Gao, Jian Wang, Lingling Sun, Songlin Zhuang

Proceedings Volume 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments; 71562C (2009) https://doi.org/10.1117/12.807026
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

Abstract

Singular optics studying optical vortices, or phase singularities, has grown rapidly recently because optical vortices have some interesting properties and promising applications, for instance, to construct highly versatile optical tweezers. In this article, the focusing properties of hyperbolic-cosine-Gaussian beam, which contains a non-spiral optical vortex and a spiral optical vortex, are investigated numerically. The phase plate may be used to construct non-spiral optical vortex by putting phase plate in a half section part of hyperbolic-cosine-Gaussian beam. Results show that the parameters of nonspiral optical vortex and spiral optical vortex influence focal intensity distribution considerably, and some novel focal patterns, such as line focal spot, "H" shape focal spot, and intensity peaks array, may occur. Focal shift and focal split may also appear in focal evolution with tunable parameters of vortices terms. The focal evolution differs for different parameters in cosh parts of hyperbolic-cosine-Gaussian beam.

Citation Download Citation

Xiumin Gao, Jian Wang, Lingling Sun, and Songlin Zhuang "Hyperbolic-cosine-Gaussian beam focusing with a non-spiral vortex and a spiral vortex", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71562C (28 January 2009); https://doi.org/10.1117/12.807026

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KEYWORDS

Optical vortices

Spiral phase plates

Particles

Optical tweezers

Refractive index

Singular optics

Diffraction

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