scholarly journals Influence of trap densities in ITO thin film on the optical, electrical, and surface plasmon resonance properties

2021 ◽  
Vol 2070 (1) ◽  
pp. 012020
Author(s):  
K Arya ◽  
M Anjitha ◽  
E Sharika ◽  
Niveditha Nair ◽  
M Meenu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Indium Tin Oxide ◽  
Defect Density ◽  
Optical Simulation ◽  
Metallic Behavior ◽  
Suitable Alternative ◽  
Plasmonic Material ◽  
Infra Red

Abstract Indium–tin–oxide (ITO) is a material having metallic behavior in the infra-red spectral range. Its electrical and optical properties are also easily tuned, making it a suitable alternative plasmonic material in the infra-red region. In this work, electrical and optical simulation modeling was performed to study the effect of trap densities in different carrier scattering mechanisms on the mobility in ITO. This study correlates the micro-structural and opto-electronic parameters to the surface plasmon resonance (SPR) behavior in the ITO thin films. The results indicate that low defect density with high carrier concentration can provide better SPR performance in ITO.

A highly sensitive D-type photonic crystal fiber infrared sensor with indium tin oxide based on surface plasmon resonance

2021 ◽  
Author(s):  
Wei Liu ◽  
Chunjie Hu ◽  
Lei Zhou ◽  
Zao Yi ◽  
Ying Shi ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Surface Plasmon ◽  
Tin Oxide ◽  
Plasmon Resonance ◽  
Indium Tin Oxide ◽  
Type Structure ◽  
Crystal Fiber ◽  
Highly Sensitive

A highly sensitive surface plasmon resonance (SPR) sensor composed of a photonic crystal fiber (PCF) with the D-type structure is designed and analyzed by the full-vector finite element method (FEM). Indium tin oxide (ITO) is adopted as the plasmonic substance on account of the low cost and controllable infrared range (1500–2600 nm). By optimizing the structural parameters, the sensor shows a maximum wavelength sensitivity of 46,000 nm/RIU and average sensitivity of 13,166.67 nm/RIU for analyte refractive indexes between 1.355 and 1.385. This PCF combining a circular layout and D-type structure offers excellent sensitivity while the deposition and manufacturing complexity can be reduced. This sensor will possess an extremely expansive development space in the field of chemical analysis and environmental safety.

scholarly journals Surface Plasmon Resonance Sensor Based on Dual-Side Polished Microstructured Optical Fiber with Dual-Core

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3911 ◽  
Author(s):  
Haixia Han ◽  
Donglian Hou ◽  
Nannan Luan ◽  
Zhenxu Bai ◽  
Li Song ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Polished Surface ◽  
Detection Range ◽  
Plasmonic Material ◽  
Microstructured Optical Fiber ◽  
Resonance Sensor ◽  
Dual Core

A surface plasmon resonance (SPR) sensor based on a dual-side polished microstructured optical fiber (MOF) with a dual core is proposed for a large analyte refractive index (RI; na) detection range. Gold is used as a plasmonic material coated on the polished surface, and analytes can be directly contacted with the gold film. The special structure not only facilitates the fabrication of the sensor, but also can work in the na range of 1.42–1.46 when the background material RI is 1.45, which is beyond the reach of other traditional MOF-SPR sensors. The sensing performance of the sensor was investigated by the wavelength and amplitude interrogation methods. The detailed numerical results showed that the proposed sensor can work effectively in the na range of 1.35–1.47 and exhibits higher sensitivity in the na range of 1.42–1.43.

Localized surface plasmon resonance sensing properties of photocatalytically prepared Ag/TiO2 films

2010 ◽  
Vol 25 (1) ◽  
pp. 117-123 ◽  
Author(s):  
Gang Chang ◽  
Ichiro Tanahashi ◽  
Munetaka Oyama
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Indium Tin Oxide ◽  
Ag Nanoparticles ◽  
Localized Surface Plasmon Resonance ◽  
Uv Light ◽  
Localized Surface Plasmon ◽  
Mixed Aqueous Solution ◽  
Coated Glass Slide

Photocatalytic deposition of Ag nanoparticles from a mixed aqueous solution of AgNO3 and polyvinylpyrrolidone (PVP) onto TiO2 film supported on indium-tin oxide-coated glass slide (Ag/TiO2 film) was carried out by using UV light irradiation. The size and shape of the Ag nanoparticles were controlled by the addition of PVP during the photodeposition. In the optical absorption spectra of the Ag/TiO2 film, the localized surface plasmon resonance (LSPR) absorption of the Ag nanoparticles was observed. When the film was immersed in various kinds of alcohols with the refractive index at 20°C (), ranging between 1.3292 and 1.4103, the peak LSPR absorption was shifted to longer wavelengths and the peak absorbance increased with increasing . The spectral change of the Ag/TiO2 film with larger spherical Ag nanoparticles was more prominent than that with smaller ones.

Multilayered coated infra-red surface plasmon resonance fibre sensors for aqueous chemical sensing

2009 ◽  
Vol 15 (5-6) ◽  
pp. 477-482 ◽  
Author(s):  
T. Allsop ◽  
R. Neal ◽  
C. Mou ◽  
P. Brown ◽  
S. Rehman ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Chemical Sensing ◽  
Infra Red
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