Characteristics of the Surface Plasmon–Polariton Resonance in a Metal Grating, as a Sensitive Element of Refractive Index Change

Bellucci, Stefano; Vernyhor, O.; Bendziak, A.; Yaremchuk, Iryna; Fitio, Volodymyr; Bobitski, Yaroslav

doi:10.3390/ma13081882

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…There is also a match for the third column for Figure 1b,c. However, the equations of the fifth row become the equations of the fourth row if it is taken into account that S (β) n = 2π/λ [46] for the grating shown in Figure 1b. On the other hand, Symmetry 2020, 12, 1315 9 of 14 the conditional period Λ con can be introduced for the equations, which relates to the prism structure.…”

Section: Comparison Of the Properties Of Sensors Based On Planar Wave...mentioning

confidence: 99%

Comparison of the Optical Planar Waveguide Sensors’ Characteristics Based on Guided-Mode Resonance

et al. 2020

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A comparison of optical sensors’ characteristics based on guided-mode resonance has been carried out. It was considered a prism structure with a metal film, a metal grating on a metal substrate and a dielectric grating on a dielectric substrate. It is shown that the main characteristics are determined by the sensitivity of the constant propagation of the respective waveguides on a change in wavelength and a change in the refractive index of the tested medium. In addition, they depend on the full width at half maximum of the spectral or angular reflectance dependence. The corresponding analytical relationships obtained for the three types of sensors are almost the same. It is demonstrated that the ratio of the sensor spectral sensitivity on the resonance curve spectral width is equal to the ratio of the angular sensitivity on the angular width of the corresponding resonance curve for all three types of sensors.

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Section: Comparison Of the Properties Of Sensors Based On Planar Wave...mentioning

confidence: 99%

Comparison of the Optical Planar Waveguide Sensors’ Characteristics Based on Guided-Mode Resonance

et al. 2020

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“…The resonance appears at the different wavelengths or at the different angles when the refractive index of the tested medium changes. Grating-based sensors can be of two types, namely, the dielectric grating on the dielectric substrate or metal or dielectric grating on the metal substrate [ 9 , 10 , 11 , 12 ]. The description and analyses of various refractive index sensors as well as providing extensive references on the corresponding sensors are presented in the reviews references [ 9 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Diffraction of a Gaussian Beam with Limited cross Section by a Volume Phase Grating under Waveguide Mode Resonance

et al. 2021

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In this work, the diffraction of a Gaussian beam on a volume phase grating was researched theoretically and numerically. The proposed method is based on rigorous coupled-wave analysis (RCWA) and Fourier transform. The Gaussian beam is decomposed into plane waves using the Fourier transform. The number of plane waves is determined using the sampling theorem. The complex reflected and transmitted amplitudes are calculated for each RCWA plane wave. The distribution of the fields along the grating for the reflected and transmitted waves is determined using inverse Fourier transform. The powers of the reflected and transmitted waves are determined based on these distributions. Our method shows that the energy conservation law is satisfied for the phase grating. That is, the power of the incident Gaussian beam is equal to the sum of the powers of the reflected and transmitted beams. It is demonstration of our approach correctness. The numerous studies have shown that the spatial shapes of the reflected and transmitted beams differ from the Gaussian beam under resonance. In additional, the waveguide mode appears also in the grating. The spatial forms of the reflected and transmitted beams are Gaussian in the absence of resonance. It was found that the width of the resonance curves is wider for the Gaussian beam than for the plane wave. However, the spectral and angular sensitivities are the same as for the plane wave. The resonant wavelengths are slightly different for the plane wave and the Gaussian beam. Numerical calculations for four refractive index modulation coefficients of the grating medium were carried out by the proposed method. The widths of the resonance curves decrease with the increasing in the refractive index modulation. Moreover, the reflection coefficient also increases.

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“…Methods of field enhancement due to resonance phenomena in periodic nanostructures are well known. In particular, waveguide modes are resonant by dielectric gratings [7], resonance of surface plasmon-polariton waves by metal gratings [8], and resonance of surface plasmons [9]. The reflection coefficient can be equal to unity under waveguide resonance by dielectric gratings.…”

Section: Introductionmentioning

confidence: 99%

Field Enhancement with Waveguide Resonance by the Structure Dielectric Grating/Dielectric Layer/Metal Substrate

Fitio,

Bulavinets,

Ilin

et al. 2024

J. Nano- Electron. Phys.

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In this work, the results of modelling the diffraction of a plane wave by the structures of type dielectric grating/dielectric layer/metal substrate are presented. The strongest field enhancement is achieved for TE polarization under of waveguide mode resonance. In addition, the reflection coefficient is zero under such resonance conditions. Waveguide mode resonance can be realized in a wide range of wavelengths by changing the grating parameters. The spectral characteristics of three types of periodic structures were modelled. The first and second structures contain a dielectric layer, while the third one does not. The waveguide mode resonance and, accordingly, zero reflection coefficient can be obtained with carefully selected structure parameters. Resonant values of the grating thicknesses and periods were determined. Numerical modelling was done with Rigorous Coupled Wavelength Analysis. The thicknesses different from the resonant ones significantly affect the reflection coefficient from the periodic structure, as was established. Absolute permissible deviation values of the thicknesses of the gratings and dielectric layers from the calculated resonance values were estimated. The waveguide mode resonance is sensitive to the incident wavelength on the periodic structure. The reflection coefficient and the field distribution along the grating period were calculated. Studied structures can be effectively used as substrates for SERS-type devices due to field enhancement and zero reflection coefficient under waveguide resonance. The strongest field on the grating surface is observed for the structure without a dielectric layer, namely, dielectric grating deposited on the metal substrate. In addition, the benefits of such periodic structures include lower manufacturing costs.

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Characteristics of the Surface Plasmon–Polariton Resonance in a Metal Grating, as a Sensitive Element of Refractive Index Change

Cited by 7 publications

References 33 publications

Comparison of the Optical Planar Waveguide Sensors’ Characteristics Based on Guided-Mode Resonance

Comparison of the Optical Planar Waveguide Sensors’ Characteristics Based on Guided-Mode Resonance

Diffraction of a Gaussian Beam with Limited cross Section by a Volume Phase Grating under Waveguide Mode Resonance

Field Enhancement with Waveguide Resonance by the Structure Dielectric Grating/Dielectric Layer/Metal Substrate

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