Title :
An Improved Design Formula for the Plasmonic Directional Beaming of Light
Author :
Yoon Sung Hwang ; Jungho Kim ; Kyoung-Youm Kim
Author_Institution :
Dept. of Opt. Eng., Sejong Univ., Seoul, South Korea
Abstract :
An improved formula is suggested for the estimation of the diffraction angles of surface plasmon polaritons via dielectric or metal-dielectric ridge gratings. We propose on-axis and off-axis directional beaming structures designed by this formula and prove their appropriateness using rigorous numerical calculations. A plasmonic beam focusing structure is also proposed.
Keywords :
diffraction gratings; laser beams; optical design techniques; optical focusing; plasmonics; polaritons; surface plasmons; dielectric gratings; diffraction angles; metal-dielectric ridge gratings; off-axis directional beaming structures; on-axis directional beaming structures; plasmonic beam focusing structure; plasmonic directional beaming; surface plasmon polaritons; Diffraction; Focusing; Gratings; Metals; Optical surface waves; Plasmons; Surface waves; Plasmonics; diffraction; grating;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2346624
