Abstract

Based on the Richards–Wolf vector diffraction integration, we obtained the expressions of the intensity and velocity of femtosecond radially polarized pulses at the focus near a dielectric interface, and the pulses are modulated by an optical system consisting of diffractive optical elements (DOEs) and a high numerical aperture (NA) lens. The factors that affected the intensity distribution and velocity evolution of the three-dimensional optical capture structural pulse (optical chain) are also analyzed. These factors include the DOE structural parameters (bandwidth, phase difference between the rings), the interception ratio of incident beam, the NA, the central wavelength of pulses, and the refractive index of exiting medium. The results show that the velocity of the optical chain will increase with an increase in the DOE bandwidth or a decrease in the refractive index of the exiting medium, and the maximum of the optical chain velocity will decrease versus the NA. Furthermore, the dependence of the optical chain velocity on its intensity distribution is also revealed. The superluminal and subluminal can also be found during the propagation of the optical chain. The velocity distribution difference between bright and dark areas along the $z$ axis is more conducive to distinguishing the trapping of the Rayleigh particles. We believe these interesting results have great potential to improve the space–time resolution to detect particle positions during high-speed optical trapping.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Tight focusing of femtosecond radially polarized light pulses through a dielectric interface

Haosen Pu, Jianhua Shu, Ziyang Chen, Zhili Lin, and Jixiong Pu
J. Opt. Soc. Am. A 32(9) 1717-1722 (2015)

Optimization-free customization of optical tightly focused fields: uniform needles and hotspot chains

Jun He, Jicheng Zhuang, Li Ding, and Kun Huang
Appl. Opt. 60(11) 3081-3087 (2021)

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

Supplementary Material (1)

NameDescription
» Visualization 1       Evolution of the optical chain generated by femtosecond radially polarized Bessel Gauss light pulses at different times.

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 (10)

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

Tables (5)

You do not have subscription access to this journal. Article tables 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 (11)

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