Investigation of subwavelength grating structure for enhanced surface plasmon resonance detection

Tahmasebpour, M.; Bahrami, Manouchehr; Asgari, Asghar

doi:10.1364/ao.53.006307

Cited by 9 publications

(1 citation statement)

References 36 publications

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“…Despite the advantages mentioned above, the development of grating-coupled SPR systems still faces two challenging problems: (1) the design and fabrication of the plasmonic grating structure and (2) the theoretical-computational modeling and analysis to predict the SPR spectrum. In the early phase of the study, SPR gratings were mostly fabricated from metal gratings on a flat dielectric layer or vice versa, which requires a thickness and periodicity of only a few tens of nanometers to prevent strong light absorption by the metal structure and meet the resonance condition to achieve optimal SPR excitation 13 , 20 , 21 . For this type of all-metallic SPR grating structure, considerable effort has been made to predict the SPR wavelength and understand the plasmonic excitation modes formed on the structure.…”

Section: Introductionmentioning

confidence: 99%

Dual plasmonic modes in the visible light region in rectangular wave-shaped surface relief plasmonic gratings

Hidayat

Pradana

Fariz

et al. 2023

Sci Rep

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Rectangular wave-shaped surface-relief plasmonic gratings (RSR-PGs) have been fabricated from a hybrid polymer by employing a simple nanoimprint photocuring lithography technique using a silicon template, followed by gold nanolayer metallization on top of the formed replica structure. By forming a one-dimensional (1D) plasmonic grating with a periodicity of approximately 700 nm, a reflectance spectral dip was experimentally observed in the visible light region, from 600 to 700 nm, with increasing incident angle from 45° to 60°. This dip can be associated with surface plasmon resonance (SPR) wave excitation, which is coupled with the diffraction order m = − 2. The calculations of reflectance spectra simulation using the rigorous coupled wave analysis (RCWA) method have also been carried out, resulting in the appearance of an SPR dip in the range of 600–700 nm, for incident angles in the range of 45°–65°, which agrees with the experimental results. Interestingly, these RSR-PGs show richer plasmon characteristics than the sine-wave-shaped plasmonic gratings. The experimental and spectral simulation results revealed two different plasmonic excitation modes: long-range SPR and quasi-localized SPR (LSPR). While the long-range SPR was formed above the ridge sections along the grating structure surface, the quasi-localized SPR was locally formed inside the groove. In addition, for RSR-PGs with a narrow groove section, the long-range SPR seems to be coupled with the periodic structure of the grating, resulting in the appearance of plasmonic lattice surface resonance (LSR) that is indicated by a narrower plasmon resonance dip. These characteristics are quite different from those found in the sine wave-shaped plasmonic gratings. The present results may thus provide better insights for understanding the plasmon excitations in this type of rectangular plasmonic grating and might be useful for designing their structure for certain practical applications.

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Section: Introductionmentioning

confidence: 99%

Dual plasmonic modes in the visible light region in rectangular wave-shaped surface relief plasmonic gratings

Hidayat

Pradana

Fariz

et al. 2023

Sci Rep

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Recent Advances in Grating Coupled Surface Plasmon Resonance Technology

Murugan,

Tintelott,

Narayanan

et al. 2024

Advanced Optical Materials

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Surface plasmon resonance (SPR) is a key technique in developing sensor platforms for clinical diagnostics, drug discovery, food quality, and environmental monitoring applications. While prism‐coupled (Kretschmann) SPR remains a “gold‐standard” for laboratory work‐flows due to easier fabrication, handling and high through put, other configurations such as grating‐coupled SPR (GC‐SPR) and wave‐guide mode SPR are yet to fulfil their technology potential. This work evaluates the technical aspects influencing the performance of GC‐SPR and reviews recent progress in the fabrication of such platforms. In principle, the GC‐SPR involves the illumination of the plasmonic metal film with periodic gratings to excite the surface plasmons (SP) via diffraction‐based phase matching. The real performance of the GC‐SPR is, however, heavily influenced by the topography of the grating structures produced via top‐down lithography techniques. This review discusses latest in approaches to achieve consistent plasmonic gratings with uniform features and periodicity over a large scale and explores the choice of plasmon‐active and substrate material for enhanced performance. The review also provides insights into the different GC‐SPR measurement configurations and highlights on opportunities with their potential applications as biosensors with translational capabilities.

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Multi-analyte hybrid plasmonic dual grating biosensor hetereostructured by convexing slit width geometrical corrugation and its potentiality for noninvasive salivary glucose monitoring

Qayoom,

Najeeb-Ud-Din

2023

Opt Quant Electron

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Investigation of subwavelength grating structure for enhanced surface plasmon resonance detection

Cited by 9 publications

References 36 publications

Dual plasmonic modes in the visible light region in rectangular wave-shaped surface relief plasmonic gratings

Dual plasmonic modes in the visible light region in rectangular wave-shaped surface relief plasmonic gratings

Recent Advances in Grating Coupled Surface Plasmon Resonance Technology

Multi-analyte hybrid plasmonic dual grating biosensor hetereostructured by convexing slit width geometrical corrugation and its potentiality for noninvasive salivary glucose monitoring

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