Nano-hole array structure with improved surface plasmon energy matching characteristics

被引：45
|
作者：
Najiminaini, Mohamadreza [1 ,2 ]
Vasefi, Fartash [1 ,2 ,3 ]
Kaminska, Bozena [1 ]
Carson, Jeffrey J. L. [2 ,3 ]
机构：
[1] Simon Fraser Univ, Sch Engn Sci, Burnaby, BC V5A 1S6, Canada
[2] Lawson Hlth Res Inst, Imaging Program, London, ON N6A 4V2, Canada
[3] Univ Western Ontario, Schulich Sch Med & Dent, London, ON N6A 5C1, Canada
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 04期
关键词：
EXTRAORDINARY OPTICAL-TRANSMISSION; METAL-FILMS; ENHANCED TRANSMISSION; GOLD FILM; RESONANCE; LIGHT;
D O I：
10.1063/1.3679173
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a nano-hole array structure in an opaque gold film that contains a cavity beneath each nano-hole. The cavity contributes to surface plasmon energy matching between the top and bottom surfaces of the gold and within the nano-hole structures. Based on bulk surface plasmon resonance (SPR) sensing experiments, the SP-matched structure had 2.8-fold higher differential transmission, 2-fold higher sensitivity, and a 7-fold higher ratio of extraordinary optical transmission at resonance to the nearby minimum compared to a conventional NHA. The results suggest that the structure with cavities has potential to improve performance of bulk SPR sensing applications. (C) 2012 American Institute of Physics. [doi:10.1063/1.3679173]
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页数：4
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