One Dimensional Plasmonic Grating: High Sensitive Biosensor

被引：45

作者：

Iqbal, Tahir ^{[1
]}

Afsheen, Sumera ^{[2
]}

机构：

[1] Univ Gujrat, Dept Phys, Fac Sci, Hafiz Hayat Campus, Gujrat 50700, Pakistan

[2] Univ Gujrat, Dept Zool, Fac Sci, Hafiz Hayat Campus, Gujrat 50700, Pakistan

来源：

PLASMONICS | 2017年 / 12卷 / 01期

关键词：

1D grating; Surface plasmon polaritons; Refractive index; Gold film; Finite element analysis (FEA); METALLIC GRATINGS; RESONANCE; TRANSMISSION; ARRAYS; SLITS;

D O I：

10.1007/s11468-016-0223-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report a simple 1D grating device fabrication on similar to 50 nm gold (Au) film deposited on glass, which is employed as a high performance refractive index (RI) sensor by exploiting the surface plasmon polaritons (SPP) excited by the grating device along the Au/analyte interface. A finite element analysis (FEA) method is employed to maximize the sensitivity of the sensor for a fixed period and thickness of a gold film and its close correspondence with experiment has given the insight for high sensitivity and enhanced transmission. Significantly, in the context of economic design and performance, it is shown that an optimally designed and fabricated 1D grating can be as sensitive as 524 nm/RIU (linearity RI = 1.33303 to 1.47399), which is remarkably higher than existing reports operating in a similar wavelength region.

引用

页码：19 / 25

页数：7

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