Abstract

We report a highly efficient generation of singular surface plasmon (SP) fields by an achiral plasmonic structure consisting of Λ-shaped apertures. Our quantitative analysis, based on leakage radiation microscopy (LRM), demonstrates that the induced spin-orbit coupling can be tuned by adjusting the apex angle of the Λ-shaped aperture. Specifically, the array of Λ-shaped apertures with the apex angle 60° is shown to give rise to the directional coupling efficiency. The ring of Λ-shaped apertures with the apex angle 60° was found to generate the maximum extinction ratio (ER=11) for the SP singularities between two different polarization states. This result provides a more efficient way for developing an SP focusing and an SP vortex in the field of nanophotonics such as optical tweezers.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Spin-orbital angular momentum tomography of a chiral plasmonic lens using leakage radiation microscopy

Airong Zhao, Aline Pham, Nessim Jebali, and Aurélien Drezet
Opt. Lett. 43(8) 1918-1921 (2018)

Singular diffraction-free surface plasmon beams generated by overlapping phase-shifted sources

Shibiao Wei, Jiao Lin, Qian Wang, Guanghui Yuan, Luping Du, Rong Wang, Le Xu, Minghui Hong, Changjun Min, and Xiaocong Yuan
Opt. Lett. 38(7) 1182-1184 (2013)

Optical spin-to-orbital plasmonic angular momentum conversion in subwavelength apertures

P. A. Brandão and S. B. Cavalcanti
Opt. Lett. 38(6) 920-922 (2013)

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 (3)

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 (4)

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