Authors: Yanxia Cui Jun Xu Yinyue Lin Guohui Li Yuying Hao Sailing He Nicholas X Fang
Publish Date: 2013/02/22
Volume: 8, Issue: 2, Pages: 1087-1093
Abstract
In this paper we employ an antireflective coating which comprises inverted πshaped metallic grooves to manipulate the behaviour of a transversemagnetic TMpolarised plane wave transmitted through a periodic nanoslit array At normal incidence such scheme cannot only retain the optical curtain effect in the output region but also generate the extraordinary transmission of light through the nanoslits with the total transmission efficiency as high as 90 Besides we show that the spatially invariant field distribution in the output region as well as the field distribution of resonant modes around the inverted πshaped grooves can be reproduced immaculately when the system is excited by an array of point sources beneath the inverted πshaped grooves Furthermore we investigate the influence of centre groove and sidecorners of the inverted πshaped grooves on suppressing the reflection of light respectively Based on our work it shows promising potential in applications of enhancing the extraction efficiency as well as controlling the beaming pattern of light emitting diodesThis work is partially supported by the National Natural Science Foundation of China 11204205 60976018 61274056 and 60990320 the National Science Foundation CMMI 0846771 Natural Foundation of Shanxi 20120110204 Special Foundation of Taiyuan University of Technology 2012L033 and the Starting Research Fund from Taiyuan University of Technology
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