Performance analysis of a plasmonic sensor based on gold nanoparticle film in infrared light using the admittance loci method

Abstract

A theoretical design of surface plasmon resonance (SPR) structure operating in attenuated total reflection (ATR) mode and comprising of silicon or chalcogenide (2S2G) prism material coated with gold film having different nanoparticle sizes has been reported along with some interesting performance related simulation results at the operating wavelength of 1200 nm in infrared. The admittance loci based technique has been employed for the appropriate choice of the metal layer thickness. The sensitivity and other performance parameters of the structure based on the choice of the high index prism material and correct gold nanoparticle size have also been presented. In comparison to other conventional prism based plasmonic structures, the proposed model provides the extra degree of freedom, i.e., variations of nanoparticle size in addition to the variation in layer thickness and the use of different high index prism materials like silicon, 2S2G materials, etc. Moreover, the width of the SPR curve can be controlled by using different high index prism materials as well as by changing gold nanoparticle size. Higher sensitivity can be achieved with 2S2G while higher detection accuracy is provided by silicon as prism material.

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

“…Metallic nanoparticles (NPs) have received great attention in recent years [ 18 – 20 ], due to their unique properties. These properties depend on the size and shape and are markedly different from those of massive material [ 21 – 23 ].…”

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

“…Indeed, these structures have new properties in their interaction with light and can more e ciently excite surface plasmons. Metallic nanoparticles (NPs) have received great attention in recent years [18][19][20], due to their unique properties. These properties depend on the size and shape and are markedly different from those of massive material [21][22][23].…”

Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

“…[5][6][7][8][9] These sensors are 1D or 2D gratings 5,10-14 apart from gold colloids/its variations, 6,15 ring resonators, 8,16 evanescent field optical waveguides, 17 etc. These applications are dependent on the sensitivity of surface plasmon polaritons (SPPs) to the refractive index (RI) of the medium adjacent to the metal surface.…”