Abstract

Based on the vector diffraction theory, this paper investigates the focusing and propagation characteristics of a Bessel–Gaussian beam with a power-order mixing helical–conical wavefront. It discusses the focused light intensity, optical gradient force distribution, and propagation characteristics under different parameters in detail. The results show that the topological charge number $L$ can finely adjust the opening of the spiral-like curve at the focal plane. The power order $n$ can adjust the energy distribution in the focus area. By increasing the eccentricity parameters $K$, the position of the maximum intensity spot will move along with the y coordinate axis. When the beam parameter $\beta$ increases, the number of intensity peaks on the focal plane increases. As the propagation distance $z$ increases, the pattern of intensity distribution will change from an ellipse to “doughnut-like.” Then a circular dark core will appear in the center of the light, and the propagation mode will gradually become an optical trap. Some optical gradient force distributions also are investigated to illuminate the applications of these alterable focal patterns.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Focusing and propagation characteristics of radially polarized helical-conical Airy beams

Yue Li, Fei Sun, Guanxue Wang, Miao Yu, Bo Song, Nongxue Peng, and Xiumin Gao
Appl. Opt. 59(16) 5058-5065 (2020)

Focus properties of cosh-Gaussian beams with the power-exponent-phase vortex

Jinsong Li, Pengjie Sun, Hongjie Ma, and Shenghua Zhou
J. Opt. Soc. Am. A 37(3) 483-490 (2020)

Focusing pattern of cosh-Gaussian beam with polarization mixing cosine phase modulation

Yueyang Chen, Jinsong Li, Haoran Zhang, Yang Xu, and Xiumin Gao
Appl. Opt. 60(12) 3327-3337 (2021)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (12)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription