Abstract

We describe how laterally confined and axially stretched needles of light can be produced by focusing a radially polarized annular optical beam with a spherical mirror. Our analysis is based on an extension of the Richards–Wolf formalism appropriate for nonaplanetic focusing systems operated under nonparaxial conditions. While maintaining their lateral confinement near the theoretical limit of 0.36λ, the needles of light that are produced can extend axially over 1000’s of λ, in full compliance with geometrical and electromagnetic considerations. Relationships are established between the thickness of the incident annular beam and the length of the needle of light.

© 2015 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Needles of longitudinally polarized light: guidelines for minimum spot size and tunable axial extent

Harold Dehez, Alexandre April, and Michel Piché
Opt. Express 20(14) 14891-14905 (2012)

Exact vectorial model for nonparaxial focusing by arbitrary axisymmetric surfaces

Denis Panneton, Guillaume St-Onge, Michel Piché, and Simon Thibault
J. Opt. Soc. Am. A 33(5) 801-810 (2016)

Creation of a 50,000λ long needle-like field with 0.36λ width

Minning Zhu, Qing Cao, and Hua Gao
J. Opt. Soc. Am. A 31(3) 500-504 (2014)

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 (5)

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 (15)

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