Performance enhancement of a copper-based optical fiber SPR sensor by the addition of an oxide layer

Saad, Yosra; Selmi, Marwa; Gazzah, Mohamed Hichem; Bajahzar, Abdullah; Belmabrouk, Hafedh

doi:10.1016/j.ijleo.2019.05.089

Cited by 35 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The aim, in order to emphasize this aspect, is to reduce the thickness of the intermediate layer and in the same time to increase its refractive index. To do this, a possible alternative is represented by Metal-Oxide (MO) layers, that have already demonstrated to be an appropriate solution to achieve what wished when are deposited as overlayer [30][31][32][33]. In particular, metal oxides are relevant because they are suitable in different application fields, ranging from optics to photonics and microelectronics [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Flexible and Ultrathin Metal-Oxide Films for Multiresonance-Based Sensors in Plastic Optical Fibers

Cennamo

Arcadio

Noel

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

We have exploited a laser-based integration process of ultra-thin Metal-Oxide (MO) films in order to improve the plasmonic effect in sensors based on D-shaped Plastic Optical Fibers (POFs). More specifically, by using ultra-thin MO films, the performances of the Surface Plasmon Resonance (SPR) phenomenon improve and a Lossy Mode Resonance (LMR) can occur. Although the role of this kind of materials has been already presented, when they are deposited as overlayer (upside the thin metal film), we have used a different approach by depositing MOs, specially Zirconium Oxide (ZrO 2 ) and Titanium Oxide (TiO 2 ), as flexible intermediate layers between the exposed core of POFs and the gold film. The MO layer is prepared from sol-gel solution and Deep-UV laser curing allows to densify the thin film and tune the refractive index, with a room temperature process fully compatible with the flexible polymer substrates. In a preliminary step, we have carried out numerical results, based on transfer matrix formalism, in order to predict the SPR response. Subsequently, we have experimentally characterized the developed sensor configurations. Numerical and experimental results have shown above all an enhancement of the sensor performances, in terms of SPR sensitivity, with respect to a reference sensor based on a polymer instead of MOs. Moreover, in some proposed sensor configurations, together with the SPR phenomenon, an LMR phenomenon was observed. It occured in a different wavelength range, for a typical refractive index range present when considering receptors for biochemical sensing applications. Therefore, both resonances (SPR and LMR) could be used in several application fields.

show abstract

Section: Introductionmentioning

confidence: 99%

Flexible and Ultrathin Metal-Oxide Films for Multiresonance-Based Sensors in Plastic Optical Fibers

Cennamo

Arcadio

Noel

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The sensitivity shows the displacement of the plasmon resonance peak (augular or spectral) per unit of refractive index (RIU). It is defined by the following expression [ 31 ]: …”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, direct ligand immobilization on a metal surface could distort them, which would lead to a negative effect on molecular interactions [ 29 ]. To overcome these limitations, various strategies in the literature have been investigated using additional flat film layers such as dielectric layers, thiol acid [ 30 ], ITO [ 31 ], and TiO2 [ 32 ] layer.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

Self Cite

View full text Add to dashboard Cite

“…The latter is strongly dependent on the resonance peak width. It is de ned in the following form [31]: (21) Figure 3 presents a comparison of the sensitivity obtained for each con guration. The R.I of sensitive medium covers the range of indices between 1.32 and 1.40.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, direct ligands immobilization on a metal surface could distort them, which would lead to a negative effect on molecular interactions [29]. To overcome these limitations, various strategies in the literature have been investigated using additional at lm layers such as dielectric layers, thiol acid [30], ITO [31] TiO2 [32] layer.…”

Section: Introductionmentioning

confidence: 99%

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

Saad

Gazzah

Mougin

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

The coronavirus (COVID-19) pandemic has put the entire world at risk and caused an economic downturn in most countries. This work provided theoretical insight into a novel fiber optic based plasmonic biosensor that can be used for sensitive detection of SARS-CoV-2. The aim was always to achieve reliable, sensitive and reproducible detection. The proposed configuration is based on Ag–Au alloy nanoparticles films covered with a layer of graphene which promotes the molecular adsorption and a thiol-tethered DNA layer as a ligand. Here the combination of two recent approaches in a single configuration is very promising and can only lead to considerable improvement. We have theoretically analyzed the sensor performance in terms of sensitivity and resolution. To highlight the importance of the new configuration, a comparison was made with two other sensors. One is based on gold nanoparticles incorporated into a host medium, the other is composed of a bimetallic Ag-Au layer in the massive state. The numerical results obtained has been validated and show that the proposed configuration offers better sensitivity (7100 nm\RIU) and good resolution (figure of merit; FOM=38.88Tand signal-to-noise ratio; SNR=0.388). In addition, a parametric study was performed such as the graphene layers number and the size of the nanoparticles.

show abstract

Performance enhancement of a copper-based optical fiber SPR sensor by the addition of an oxide layer

Cited by 35 publications

References 23 publications

Flexible and Ultrathin Metal-Oxide Films for Multiresonance-Based Sensors in Plastic Optical Fibers

Flexible and Ultrathin Metal-Oxide Films for Multiresonance-Based Sensors in Plastic Optical Fibers

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

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

Contact Info

Product

Resources

About