Abstract

We report on the fabrication of single-layered gold sawtooth gratings consisting of И, V, and N basic units by using an e-beam direct write technique together with a lift-off process. The И- and N-type sawtooth gratings are 2D chiral but not the V-type sawtooth grating. Large circular dichroism (CD) in the visible range is observed for the chiral sawtooth gratings while there is none for the V-type sawtooth grating. The experimental results are modelled qualitatively by simulations using a finite integration technique. The simulations show that the CD observed is due to the difference in the absorption in the metal for circularly polarized incidence light of different handedness. The sawtooth gratings are simple and can be easily mass produced for possible applications in waveplates and circular polarizers.

© 2012 Optical Society of America

Full Article  |  PDF Article
Related Articles
Optical planar chiral metamaterial designs for strong circular dichroism and polarization rotation

Do-Hoon Kwon, Pingjuan L. Werner, and Douglas H. Werner
Opt. Express 16(16) 11802-11807 (2008)

Flexible chiral metamaterials in the terahertz regime: a comparative study of various designs

G. Kenanakis, R. Zhao, A. Stavrinidis, G. Konstantinidis, N. Katsarakis, M. Kafesaki, C. M. Soukoulis, and E. N. Economou
Opt. Mater. Express 2(12) 1702-1712 (2012)

Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials

Tun Cao, Lei Zhang, Robert E. Simpson, Chenwei Wei, and Martin J. Cryan
Opt. Express 21(23) 27841-27851 (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 (8)

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

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