Abstract
A structure for surface-plasmon-polariton mediated directional off-axis beaming with a dynamic tunability of radiation direction is proposed. The key finding in this Letter is that properly designed metal–dielectric composite grating structures surrounding subwavelength metal slit produce a dynamically tunable off-axis beaming effect with variation of the grating permittivity value. The controllability of beam direction by the grating permittivity value opens a way to develop active plasmonic devices based on the beaming effect.
© 2009 Optical Society of America
Full Article | PDF ArticleMore Like This
D. Z. Lin, C. K. Chang, Y. C. Chen, D. L. Yang, M. W. Lin, J. T. Yeh, J. M. Liu, C. H. Kuan, C. S. Yeh, and C. K Lee
Opt. Express 14(8) 3503-3511 (2006)
Hwi Kim, Junghyun Park, and Byoungho Lee
Appl. Opt. 48(31) G68-G72 (2009)
Eui-Young Song, Hwi Kim, Woo Young Choi, and Byoungho Lee
Opt. Lett. 38(19) 3827-3829 (2013)