Surface-plasmon-enhanced visible light emission of ZnO/Ag grating structures

被引：1
|
作者：
Gwon, Minji [1 ]
Lee, Eunsongyi [1 ]
Kim, Dong-Wook [1 ]
Yee, Ki-Ju [2 ]
机构：
[1] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea
[2] Chungnam Natl Univ, Dept Phys, Daejeon 305764, South Korea
来源：
PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES IX | 2011年 / 8096卷
基金：
新加坡国家研究基金会;
关键词：
surface plasmon polariton; ZnO; grating-coupling; photoluminescence; nanoimprint lithography; PHOTOLUMINESCENCE; ENERGY;
D O I：
10.1117/12.892860
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We investigated the optical properties of ZnO/Ag grating structures, with the periods of 1000 and 1400 nm, fabricated by sputtering and nanoimprint lithography. The grating structures exhibited multiple peak features in visible-range photoluminescence (PL) spectra. Whereas a ZnO/Ag planar thin film showed two broad PL peaks in UV and visible region. Moreover, the PL intensity of the periodic structures was similar to 100 times larger than that of the planar counterpart. Several reflectance dips in the visible range were seen only in the grating structures, which could be caused by photon-induced surface plasmon polariton (SPP) excitation via the grating coupling. The PL peaks well matched with the reflectance dips. This represented that the PL enhancement should be originated from the SPP excitation. The finite-difference time-domain simulations also supported the plasmonic effects in the periodic structures.
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页数：7
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