Enhanced Focusing Properties Using Surface Plasmon Multilayer Gratings | Zendy

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

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Enhanced Focusing Properties Using Surface Plasmon Multilayer Gratings

Author(s) -

Hui Li,

Lianshan Yan,

Zhen Guo,

Wei Pan,

Kunhua Wen,

Hengyi Li,

Xiangang Luo

Publication year - 2012

Publication title -

ieee photonics journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.725

H-Index - 73

eISSN - 1943-0655

pISSN - 1943-0647

DOI - 10.1109/jphot.2011.2178591

Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics

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.

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