Nanometer scale light focusing with high cavity-enhanced output

被引：6
作者：
Consonni, M. [1 ,2 ]
Hazart, J. [1 ]
Lerondel, G. [2 ]
Vial, A. [2 ]
机构：
[1] CEA LETI, MINATEC, F-38054 Grenoble 9, France
[2] Univ Technol Troyes, CNRS FRE 2848, Inst Charles Delaunay, Lab Nanotechnol & Instrumentat Opt, F-10010 Troyes, France
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 08期
关键词：
metallic thin films; mode matching; optical films; optical focusing; radiation pressure; surface plasmons; SINGLE SUBWAVELENGTH APERTURE; THIN METAL-FILMS; OPTICAL-TRANSMISSION; SURFACE-PLASMONS; BEAMING LIGHT; CORRUGATIONS;
D O I：
10.1063/1.3112003
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Efficient nanoscale optical focusing is demonstrated in double-structured thin metallic films supporting both surface plasmons and cavity eigenmodes. Numerical simulations show that efficient mode coupling can dramatically enhance the transmission of a subwavelength slit. For a spot size of similar to lambda/10, the cavity induced enhancement is about an order of magnitude, leading to a final structure output (transmitted power/incident power) of similar to 30%. Results are discussed in terms of cavity-slit mode matching and photon trapping within the cavity.
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页数：6
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