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]

引用

页数：4

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