Enhanced Focusing Properties Using Surface Plasmon Multilayer Gratings

Hui Li; Lianshan Yan; Zhen Guo; Wei Pan; Kunhua Wen; Hengyi Li; Xiangang Luo

doi:10.1109/JPHOT.2011.2178591

IEEE Photonics Journal (Jan 2012)

Enhanced Focusing Properties Using Surface Plasmon Multilayer Gratings

Hui Li,
Lianshan Yan,
Zhen Guo,
Wei Pan,
Kunhua Wen,
Hengyi Li,
Xiangang Luo

Affiliations

Hui Li: <formula formulatype="inline"><tex Notation="TeX">$^{1}$</tex></formula>Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
Lianshan Yan: Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
Zhen Guo: Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
Wei Pan: Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
Kunhua Wen: Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
Hengyi Li: <formula formulatype="inline"><tex Notation="TeX">$^{2}$</tex></formula>State Key Lab of Optical Technology for Microfabrication , Institute of Optics and Electronics, Chinese Academy of Science, Chengdu, China
Xiangang Luo: State Key Lab of Optical Technology for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Science, Chengdu, China

DOI: https://doi.org/10.1109/JPHOT.2011.2178591
Journal volume & issue: Vol. 4, no. 1
pp. 57 – 64

Abstract

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A subwavelength slit with metal-dielectric-metal (MDM) composite surface gratings is proposed and numerically investigated using finite-difference time-domain (FDTD) method. Compared with conventional monometal-grating based structures, focusing properties of the proposed MDM structure can be enhanced based on multiple scattering and coupling of surface plasmon polaritons (SPPs) along the metal/dielectric multilayer films, especially the focal length can be varied from ~ 2.6 to 5.82 μm by adjusting the dielectric thickness.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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