2D polymer/metal structures for surface plasmon resonance

Urbancová, Petra; Goraus, Matej; Pudiš, Dušan; Hlubina, Petr; Kuzma, Anton; Jandura, Daniel; Ďurišová, Jana; Micek, Patrik

doi:10.1016/j.apsusc.2020.147279

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…For example, cSPR sensors always have a large full width at half maximum (FWHM), which accounts for their decreasing sensitivity and poor precision, leading to a low signal-to-noise ratio. The low penetration depth imposes a constraint on the response range and also distorts the reflected signal [5,6].…”

Section: Introductionmentioning

confidence: 99%

Long-range surface plasmon resonance sensor based on side-polished D-shaped hexagonal structure photonic crystal fiber with the buffer layer of magnesium fluoride

Luo¹,

Meng²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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In this paper, we demonstrate a long-range surface plasmon resonance (LRSPR) sensor based on D-shaped hexagonal structure photonic crystal fiber (PCF) with buffer layer of magnesium fluoride (MgF2). The theoretical analysis is first introduced to reveal surface plasmon polariton (SPP) mode excitation by the y-polarized core-guided mode. The influences exerted by different thicknesses of Au film and MgF2 buffer layer are theoretically investigated with the full vectorial finite element method for optimizing structure parameters. A novel status of electric field boundary (SEFB) technique is proposed to analyze the reciprocal sensing performance of symmetric LRSPR (sLRSPR) sensor. Theoretical simulation reveals that the LRSPR with PCF/MgF2 (100 nm)/Au (50 nm) architecture exhibits the significant performance and has an intensity sensitivity improvement of 160.13% compared with conventional SPR (cSPR) sensor. With the simulation providing the theoretical basis, a proof-of-concept experiment is performed with the D-shaped PCF fabricated by a wheel polishing system. The experimental results show good agreement with the theoretical calculations, and both of them consistently indicate that the LRSPR-based sensor has an improved intensity sensitivity (−490.625% RIU−1) and an increased penetration depth. Furthermore, focusing on the sensing principle, the proposed SEFB method can be applied in the analysis of other types of multilayer SPR sensor. The optimal LRSPR sensor with improved detection accuracy shows great promise for applications in the field of biochemical measurement.

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Section: Introductionmentioning

confidence: 99%

Long-range surface plasmon resonance sensor based on side-polished D-shaped hexagonal structure photonic crystal fiber with the buffer layer of magnesium fluoride

Luo¹,

Meng²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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“…The period of Λ = 500 nm was given by our previous experiences and results [ 47 ]. A 2D grating structure with this period was prepared close to the resolution limit of DLW system Nanoscribe and showed sufficient quality and homogeneity.…”

Section: Methodsmentioning

confidence: 99%

“…A 2D grating structure with this period was prepared close to the resolution limit of DLW system Nanoscribe and showed sufficient quality and homogeneity. The 2D grating structures with periods below 500 nm were of lower quality and were not deep enough, which was manifested in very shallow SPR dips in reflected spectra [ 47 ]. Another reason for choosing the period of 500 nm was to achieve the SPR dips in visible (VIS)/ near-infrared (NIR) spectral range with regard to our available detection technique.…”

Section: Methodsmentioning

confidence: 99%

“…The femtosecond laser pulses are focused by 63 × 1.4 NA immersion objective in the volume of liquid IP-Dip polymer and TPA initiates the polymerization process in the voxel. We have chosen IP-Dip polymer for fabrication of grating structure because it guarantees ideal focusing and highest resolution for Nanoscribe′s DiLL mode [ 46 , 47 ].…”

Section: Design and Fabrication Of Spr Structurementioning

confidence: 99%

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IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes

et al. 2021

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In this paper, we present a two-dimensional surface plasmon resonance structure for refractive index sensing of liquid analytes. The polymer structure was designed with a period of 500 nm and prepared in a novel IP-Dip polymer by direct laser writing lithography based on a mechanism of two-photon absorption. The sample with a set of prepared IP-Dip structures was coated by 40 nm thin gold layer. The sample was encapsulated into a prototyped chip with inlet and outlet. The sensing properties were investigated by angular measurement using the prepared solutions of isopropyl alcohol in deionized water of different concentrations. Sensitivity of 478–617 nm per refractive index unit was achieved in angular arrangement at external angle of incidence of 20°.

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“…Methods to fabricate nanogratings have been widely developed in recent years. Techniques such as laser interference lithography, 30 , 31 electron beam lithography, 32 nanoimprinting, 33 – 35 focused ion beam, 36 femtosecond laser modification, 37 direct laser writing, 38 and optical disc-based methods 39 , 40 have been extensively studied. Among these methods, tearing aluminum gratings from DVD discs is one of the most convenient and cost-effective approaches to fabricating large-scale and high-uniform metal gratings.…”

Section: Implementationsmentioning

confidence: 99%

Compact surface plasmon resonance sensor using the digital versatile disc grating as a coupler and a disperser

Wang

Cao

et al. 2023

Opt. Eng.

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Compact surface plasmon resonance (SPR) sensors are highly demanded due to their small size, low cost, and wide application scenarios compared with benchtop sensors. To realize high-precision spectral or angular analysis, most compact SPR sensors need spectrometers or rotation stages, which increase the cost of the device. We demonstrate a low-cost and compact SPR sensor by utilizing a single grating as a coupler and a disperser. The polychromatic light emitted from a light-emitting diode was coupled to surface plasmon modes by a grating made from a digital versatile disc-recordable disc. The light was dispersed by the same grating and collected by a linear charge-coupled device. The real-time detection of the SPR spectra and the resonant wavelengths was realized by homemade software based on the laboratory virtual instrument engineering workbench. By measuring different concentrations of glucose solution and sodium chloride solution, we obtain a high refractive index (RI) resolution of 5.52 × 10 −5 RI unit. This compact SPR sensor can be applied in the areas of food safety, environmental monitoring, medical diagnosis, and so on.

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2D polymer/metal structures for surface plasmon resonance

Cited by 10 publications

References 27 publications

Long-range surface plasmon resonance sensor based on side-polished D-shaped hexagonal structure photonic crystal fiber with the buffer layer of magnesium fluoride

Long-range surface plasmon resonance sensor based on side-polished D-shaped hexagonal structure photonic crystal fiber with the buffer layer of magnesium fluoride

IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes

Compact surface plasmon resonance sensor using the digital versatile disc grating as a coupler and a disperser

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