Effect of roughness on surface plasmons propagation along deep and shallow metallic diffraction gratings

Bruhier, Hugo; Verrier, Isabelle; Gueye, Thiaka; Varenne, Christelle; Ndiaye, Amadou; Parriaux, Ο.; Veillas, Colette; Reynaud, Stéphanie; Brunet, Jérôme; Jourlin, Yves

doi:10.1364/ol.443659

Cited by 10 publications

(10 citation statements)

References 7 publications

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“…These reports have revealed that the light reflected at normal incidence from surface irregularities has much more precise optical information than that measured at oblique incidences. , We have used normal incident reflectance spectra for the Drude–Lorentz model to derive optical parameters of periodic nanostructures under the influence of surface irregularities (Supporting Information SI-3). Many authors ,,,, have previously used this technique to investigate the coupling mechanism of plasmons with photon- or exciton-induced diffractions that occurs either by wavenumber conservation (known as optical coupling) or by nonconservation of wavenumber (roughness coupling). As seen in the spectra of Figure (a), the variation of thickness and surface roughening has a consistent effect on the average reflectivity and its interference effects.…”

Section: Resultsmentioning

confidence: 99%

“…The base sample E-0 consists of exclusive 2-D nanostructures that have streak spacing between layers and boundary edges, which maintained quasi-equilibrium in shear stress states to give lower values of surface roughness. 9,11 The progress of dual growth of corrugated particles along with vertical nanoflakes in E-50 leads to considerable change in surface texturing and film thickness to remarkably thrust the values of surface roughness toward a higher range. Similarly, the E-100 sample has the sole assembly of 3-D cubic nanostructures with a nonlinear spread of crack openings between edges, which further trivially raises the surface roughness.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…However, there are some interesting reports on the effect of surface roughness variation on crystallinity that try to distinguish the contribution of surface to bulk dimensions on far- and near-field optical properties. , For instance, Hohenester et al studied the influence of surface roughness on plasmon fluctuations and their destructive interference effect on far-field optical properties. Similarly, Bruhier and co-workers have performed both experimental and theoretical analysis for the effect of surface roughness on propagation of surface plasmons within deep and shallow metallic diffraction gratings. In addition to this, Siegel et al studied the modified propagation of surface plasmon polaritons (SPPs) under the effect of laser-induced periodic texturing on the surface.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring Surface Morphology for Characteristic Exciton–Plasmon Resonances in Self-Assembled CuS Nanostructured Films

Singh¹,

Arora²,

Natarajan³

et al. 2023

J. Phys. Chem. C

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Nanoscale surface corrugation strongly influences the propagation of plasmons and its induced characteristics in self-organized periodic nanostructures. Here, the role of varying surface roughness and thickness in periodic nanostructures of a self-assembled CuS system has been reported. The mixing of surfactants is used to translate the contrary type of clustering processes in a bottom-up fabrication method. X-ray diffraction (XRD) study identifies the improved crystallinity and quantization effects for invariable hexagonal crystal structures. The elaboration of Raman measurements has distinguished the formulated interlayer soft phonon modes from interlayer electron–phonon interactions that gave split-off features in surface enhanced Raman scatterings (SERS). The absorption spectra in linear and diffuse reflectance geometry monitor the scattering of the exciton–plasmon field in terms of defect states, Urbach’s energy, and optical gap. The true nature of periodic energy exchange between exciton–plasmon coupled systems has been derived from the Drude–Lorentz oscillator model fitting to near-normal incidence reflectance spectra. The effects on a dimensionally constrained plasmon’s momentum space and phase velocities are visible in the extraordinary optical behavior of the derived refractive index and dielectric constants. The correlative study on electronic, oxidation, and valence states has been reported using X-ray photoelectron spectroscopy (XPS) measurements. This approach of fabrication and characterization is expected to overcome the major roadblocks for the formation of metamaterials with identical large arrays for photonic devices.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tailoring Surface Morphology for Characteristic Exciton–Plasmon Resonances in Self-Assembled CuS Nanostructured Films

Singh¹,

Arora²,

Natarajan³

et al. 2023

J. Phys. Chem. C

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“…This interaction results in multiple reflections at the air/PEGT and PEGT/water interfaces, causing power loss. Additionally, roughness [ 32 ] and potential discrepancies between the permittivity of gold used in the software and that associated with the sample could partially explain the difference between theory and experiment.…”

Section: Results and Discussionmentioning

confidence: 99%

Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration

Laffont

Crespo‐Monteiro

Valour

et al. 2023

Sensors

Self Cite

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A new plasmonic configuration is proposed for application in a sensor and demonstrated for the detection of variations in the bulk refractive index of solutions. The configuration consists of monitoring two diffracted orders resulting from the interaction of a TM-polarized optical beam incident on a grating coupler, operating based on an effect termed the “optical switch”. The two monitored diffracted orders enable differential measurements which cancel the drift and perturbations common to both, leading to an improved detection limit, as demonstrated experimentally. The measured switch pattern associated with the grating coupler is in good agreement with theory. Bulk sensing is demonstrated under intensity interrogation via the sequential injection of solutions comprised of glycerol in water into a fluidic cell. A limit of detection of about 10−6 RIU was achieved. The optical switch configuration is easy to implement and is cost-effective, yielding a highly promising approach for the sensing and the real-time detection of biological species.

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“…The surface roughness of polished optical fibers still requires serious attention. According to several theoretical and experimental articles on prism-based configurations, the characteristic of the SPR curve is affected not only by the thickness [13] and homogeneity [14] of the metal layer but also by the roughness of the layer [15]. The methods and control parameters implemented during the deposition of the thin metal layer also play an important role [16].…”

Section: Introductionmentioning

confidence: 99%

Effects of thickness and roughness on plasmonic characteristics of gold thin films deposited on polished optical fiber

Sukma,

Hanif,

Masruroh

et al. 2024

Mater. Res. Express

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The thickness and roughness of metal layers substantially affect the performance of surface plasmon resonance (SPR)-based sensors. The deposition methods, control parameters, and substrate characteristics influence the layer thickness and roughness. This study investigates the SPR characteristics of a polished optical fiber surface coated with gold (Au) metal of different thicknesses. The Au layer is deposited via the thermal evaporation method, and its thickness is varied by controlling the deposition time (3–6 minutes). A proportionality relationship between thickness and deposition time is observed. Island-shaped structures in gold (Au) morphology are formed due to low adhesion to the substrate. The shape of this island creates gaps in the layer, causing scattering. In addition, the roughness on the gold surface triggers the Localized Surface Plasmon Resonance (LSPR) phenomenon. As a result, the measured dielectric characteristics differ from the reference. The SPR curve calculation simulation was carried out based on reference optical parameters and measurement results by an ellipsometer, which were then compared with experiments. The obtained results show that the substrate roughness, morphology, and thickness of the Au layer play an essential role in determining the characteristics of the SPR curve in a fiber optic plasmonic sensor. As a result, in basic experiments, the sample with an Au thickness of 27.37 nm (deposition time = 3 min) shows better characteristics (half-maximum full width, minimum transmittance, and resonance wavelength) compared with the sample with an Au thickness of 53.97 nm (deposition time = 4 min), Although 53.97 nm is the optimal thickness from the simulation using reference optical parameters (smooth substrate surface and smooth gold layer).

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Effect of roughness on surface plasmons propagation along deep and shallow metallic diffraction gratings

Cited by 10 publications

References 7 publications

Tailoring Surface Morphology for Characteristic Exciton–Plasmon Resonances in Self-Assembled CuS Nanostructured Films

Tailoring Surface Morphology for Characteristic Exciton–Plasmon Resonances in Self-Assembled CuS Nanostructured Films

Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration

Effects of thickness and roughness on plasmonic characteristics of gold thin films deposited on polished optical fiber

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