Scattering of a plane wave by an inhomogeneous 1D dielectric layer with gradient refractive index

Vanyushkin, N. A.; Gevorgyan, A. H.; Golik, S. S.

doi:10.1016/j.optmat.2022.112306

Cited by 11 publications

(4 citation statements)

References 11 publications

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“…In this work, we used the transfer matrix method [42][43][44][45] to calculate the transmission and reflection spectra of the investigated structure. The transfer matrix for the j-th layer in the structure can be written as: In this work, we used the transfer matrix method [42][43][44][45] to calculate the transmission and reflection spectra of the investigated structure. The transfer matrix for the j-th layer in the structure can be written as:…”

Section: Model Of the Refractive Index Sensormentioning

confidence: 99%

The Determination of the Sensitivity of Refractive Index Sensors

Efimov,

Vanyushkin,

Gevorgyan

2024

Photonics

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A new approach to determining the sensitivity of refractive index sensors is proposed. It has been shown that relative and absolute sensitivity show different results, and also, for the first time, it is demonstrated that relative sensitivity has advantages over absolute sensitivity. In addition, the influence of the relative width of the photonic band gap and the difference in the refractive indices of the layers on the sensitivity are examined and the corresponding dependences of these parameters are obtained. We propose these parameters as a convenient tool for optimizing the sensitivity of sensors based on defective photonic crystals. Finally, results are obtained regarding the behavior of the defect mode at the center of the photonic band gap of one-dimensional photonic crystals.

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Section: Model Of the Refractive Index Sensormentioning

confidence: 99%

The Determination of the Sensitivity of Refractive Index Sensors

Efimov,

Vanyushkin,

Gevorgyan

2024

Photonics

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show abstract

“…In this work, we used the transfer matrix method [60,[62][63][64] to calculate the transmission and reflection spectra of the investigated structure. The transfer matrix relates the field amplitudes at different interfaces and can be presented for j-th layer in the following form:…”

Section: = =mentioning

confidence: 99%

On the sensitivity of defect modes outside the first photonic bandgap in optical sensors based on defected 1D photonic crystals

Kamenev,

Efimov,

Vanyushkin

et al. 2024

Phys. Scr.

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In this paper, we investigated the possibility of using of defect modes (DMs) in the second photonic bandgap (PBG) in defected one dimensional (1D) photonic crystals (PCs) for creating optical sensors. The dependences of the relative sensitivities on the defect layer (DL) thickness for the first and second PBGs at optimized PC parameters are obtained and compared and the advantage of the first PBG over the second PBG in all ranges of the DL thickness is shown. However, as the order of the defect mode (DM) and optical contrast of the structure increase, this relative advantage becomes less prominent. The behavior of the DMs and their relative sensitivity outside the PBG when DL thickness changes are considered. The dependences of the relative sensitivity on different parameters of the PC for DM in the first and second PBGs are also compared.

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“…Equations (1 -6) are correct if there is no absorption in the structure. When taking in to account absorption it is necessary to replace the complex conjugation in the formulas by the inversion of the wave vector k  -k [34]. Equation ( 6) will then take the form:…”

Section: The Characteristic Equation For the Defected Pc Eigenmodesmentioning

confidence: 99%

Sensor with enhanced performance based on photonic crystal with a defect layer

Efimov,

Vanyushkin,

Gevorgyan

et al. 2023

Computer Optics

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We propose an improved structure of an optical biosensor based on a photonic crystal with a defect layer, which can detect the concentration of organic contaminants in water by defect mode shift. We investigated 4 types of defective photonic crystals with different arrangements of layers inside the perfect photonic crystals and their impact on the performance of the sensor. The sensitivity and amplitude of defect mode were examined as a function of defect layer thickness. Also, the peculiarities of edge modes in the presence of defect layer were investigated. Finally, we obtained a characteristic equation to determine the wavelengths of defect modes for an arbitrary 1D photonic crystal with an isotropic defect inside.

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Scattering of a plane wave by an inhomogeneous 1D dielectric layer with gradient refractive index

Cited by 11 publications

References 11 publications

The Determination of the Sensitivity of Refractive Index Sensors

The Determination of the Sensitivity of Refractive Index Sensors

On the sensitivity of defect modes outside the first photonic bandgap in optical sensors based on defected 1D photonic crystals

Sensor with enhanced performance based on photonic crystal with a defect layer

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