Comparison of different photoresist buffer layers in SPR sensors based on D-shaped POF and gold film

Cennamo, Nunzio; Pesavento, Maria; Maria, Letizia De; Gălătuș, Ramona; Mattiello, Francesco; Zeni, Luigi

doi:10.1117/12.2265603

Cited by 6 publications

(7 citation statements)

References 14 publications

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“…Many approaches enhance performance of SPR optical sensors with bi-metals [22], buffer layers [23], and nanoparticles [24]. The integration of plasmonic sensors with optical fibers and waveguides leads to high performance systems [25] that work in both liquids and gases [26].…”

Section: Performance Improvement Of Refractometric Sensors Through Hymentioning

confidence: 99%

Performance Improvement of Refractometric Sensors Through Hybrid Plasmonic–Fano Resonances

Elshorbagy

Cuadrado

González

et al. 2019

J. Lightwave Technol.

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In this paper, we present a plasmonic refractometric sensor that works under normal incidence; allowing its integration on a fiber tip. The sensor's material and geometry exploit the large scattering cross-section given by high-contrast of the index of refraction subwavelength dielectric gratings. Our design generates a hybrid plasmonic-Fano resonance due to the interference between the surface plasmon resonance and the grating response. We optimize the sensor with a merit function that combines the quality parameter of the resonance and the field enhancement at the interaction volume where the plasmon propagates. Our device shows a high sensitivity (1000 nm/RIU) and a high Figure of Merit (775 RIU −1 ). Degradation in performance is negligible through a wide dynamic range up to 0.7 RIU. These quantitative parameters overperform compared to similar plasmonic sensors.

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Section: Performance Improvement Of Refractometric Sensors Through Hymentioning

confidence: 99%

Performance Improvement of Refractometric Sensors Through Hybrid Plasmonic–Fano Resonances

Elshorbagy

Cuadrado

González

et al. 2019

J. Lightwave Technol.

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“…The procedure for the fabrication of the D-shaped POF platforms includes several steps [11][12][13][14]. The plastic optical fiber (PMMA core of 980 µm and fluorinated polymer cladding of 10 µm) without protective jacket was embedded in a resin block and the cladding was removed by two different polishing papers along half circumference, giving the desired D-shaped to the device [13].…”

Section: Plasmonic Pof Sensorsmentioning

confidence: 99%

“…Surface plasmon resonance bio-chemical sensors in optical fibers are suitable for on-site and real-time monitoring of different analytes, then they play an important role in many research fields [1][2][3][4][5]. Many solutions have been proposed in order to optimize the performances of the SPR sensors in terms of throughputs, reliability, robustness and miniaturization [6][7][8][9][10][11]. Whatever the application, the improvement of the sensitivity with the aim to observe small variations of refractive index of the analyte under investigation is one of the critical point to be addressed [6].…”

Section: Introductionmentioning

confidence: 99%

“…In the SPR D-shaped POF sensors described in this work the use of a buffer layer based on photoresist is a successful solution for increasing the sensitivity of the device. However, the selection of the photoresist depends on the specific application and on the region of refractive index of interest [11]. The SPR sensing platforms were fabricated by removing the cladding of a POF along half circumference, spin coating on the exposed core a buffer layer of photoresist, and finally sputtering a thin gold film [8].…”

Section: Introductionmentioning

confidence: 99%

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Exploiting Several Buffer Layers in SPR D-Shaped POF Sensors Based on Gold Film for Different Applications

Cennamo

Zuppella

Arcadio

et al. 2019

7th International Symposium on Sensor Science

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We present a comparative study of three optical sensing platforms based on surface plasmon resonance (SPR) in plastic optical fibers (POFs). The proposed sensors consist of a D–shaped POF sensing area, where the exposed core is covered by a photoresist layer, used as intermediate layer between the fiber’s core and the metal (gold) film. The photoresist deposited on the exposed core in the D–shaped POF region, is pivotal in order to improve the performances of the sensor in terms of sensitivity. In particular, we have compared the performances of three different buffer layers based on the following photoresist: Microposit SU-8 3005, Microposit S1813 before and after the expiry date.

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“…As such, they play an important role in many research fields [1][2][3][4][5]. Many solutions have been proposed in order to optimize the performances of the SPR/LSPR sensors in terms of throughputs, reliability, robustness and miniaturization [6][7][8][9][10][11]. The optical fiber sensors can be defined as intrinsic and extrinsic, according to the interaction of the fiber with the analyzed medium (intrinsic) or its use as a mere waveguide allowing the launch of the light to the sensing region and its collection (extrinsic).…”

Section: Introductionmentioning

confidence: 99%

A Green Slab Waveguide for Plasmonic Sensors Based on Bacterial Cellulose

Cennamo

Trigona

Graziani

et al. 2019

7th International Symposium on Sensor Science

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We use as optical waveguide a green composite, based on bacterial cellulose (BC). More specifically, we have sputtered a thin gold film on this innovative slab waveguide for obtaining a Localized Surface Plasmon Resonance (LSPR) sensor. Experimental results confirm the possibility of using the BC based composite as an environmental friendly optical sensor platform with plasmonic capabilities, which could be exploited for realizing disposable biosensors. The new optical sensor has been used by combining it with optical fibers. The fibers connect the green disposable optical sensor with a light source and with a spectrometer. The device has been tested by measuring the refractive index of different water-glycerin solutions.

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Comparison of different photoresist buffer layers in SPR sensors based on D-shaped POF and gold film

Cited by 6 publications

References 14 publications

Performance Improvement of Refractometric Sensors Through Hybrid Plasmonic–Fano Resonances

Performance Improvement of Refractometric Sensors Through Hybrid Plasmonic–Fano Resonances

Exploiting Several Buffer Layers in SPR D-Shaped POF Sensors Based on Gold Film for Different Applications

A Green Slab Waveguide for Plasmonic Sensors Based on Bacterial Cellulose

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