Improving the performance of gold nanohole array biosensors by controlling the optical collimation conditions

被引：21
作者：
de Menezes, Jacson Weber [1 ,2 ]
Thesing, Anderson [1 ]
Valsecchi, Chiara [1 ]
Armas, Luis E. G. [2 ]
Brolo, Alexandre G. [1 ]
机构：
[1] Univ Victoria, Dept Chem, Victoria, BC V8W 3P6, Canada
[2] Fed Univ Pampa, Dept Engn, BR-97546550 Alegrete, RS, Brazil
来源：
APPLIED OPTICS | 2015年 / 54卷 / 21期
基金：
加拿大自然科学与工程研究理事会;
关键词：
SURFACE-PLASMON RESONANCE; SILVER NANOPARTICLES; CHEMICAL SENSORS; LITHOGRAPHY; CHIP; SENSITIVITY; SILICA; BEAM; SIZE; TOOL;
D O I：
10.1364/AO.54.006502
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An experimental investigation on how the bulk and surface sensitivities of gold nanohole arrays fabricated by interference lithography affect the degree of white light beam collimation is presented. The optical transmission response of nanohole arrays has been recorded by focused and collimated beam transmission spectra. The results show that both the bulk and surface sensitivities for the collimated case are much larger than for the focused case. In particular, the shape of the spectra was dependent on the degree of beam collimation. The results showed that improved sensing performance (around 3.5 times) and higher figure of merit (around 4.4 times) can be obtained by simply adjusting the incident/collection experimental conditions in transmission measurements. (C) 2015 Optical Society of America
引用
收藏
页码：6502 / 6507
页数：6
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