High-Sensitive Thermal Sensor Based on a 1d Photonic Crystal Microcavity With Nematic Liquid Crystal

Charik, Haouari; Bouras, Mounir; Bennacer, and Hamza

doi:10.2528/pierm20110404

Cited by 6 publications

(4 citation statements)

References 34 publications

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“…At the same time, 1D PCs are the easiest to fabricate, which makes them a very popular object of scientific research [12][13][14][15][16][17][18]. Often, 1D PCs with a defect layer (DL) in the structure are used as sensors [19][20][21][22][23]. This layer allows the creation of certain states in the PBG where light is localized.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…As a potential alternative, SPR can be combined with nanostructures [18][19][20][21], where a thin metal film is combined with periodic corrugations at subwavelength scales. This alternative approach offers notable advantages in terms of highthroughput, ease of integration, and miniaturization.…”

Section: Introductionmentioning

confidence: 99%

High-performance Silicon Nitride Grating-coupled SPR Sensors for Gas Detection and Biosensing

Bouras

2024

PIER Letters

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Surface Plasmon Resonance (SPR) serves as a crucial optical technique in the realm of chemical sensing. Under specific conditions, the reflectivity of a thin metal film exhibits an exceptional sensitivity to optical changes in the medium on one side. In this investigation, we propose and simulate a plasmonic sensor incorporating a silicon nitride grating with Ag layers for the detection of solution and gas at an optical communication wavelength of 1550 nm. In both cases of the surface diffraction-grating, there is a notable enhancement in angular sensitivity compared to conventional prism-coupled configurations. Simulations, employing rigorous coupled wave analysis (RCWA), highlight that the suggested sensor, optimized in design parameters, offers notably superior sensitivity, a lower detection limit, and a higher figure of merit (FOM) than existing grating-based SPR sensors. This implies the potential realization of refractive index sensors with a high figure of merit through such streamlined and compact configurations.

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“…Planar photonic crystal structures with various combinations of their constituent layers have attracted close attention of researchers due to their capabilities for effective control of optical radiation [1][2][3][4][5]. Control of reflection and transmission spectra for such structures, as a rule, is achieved by including layers in their composition, the material parameters of which depend on easily variable external factors (electric and magnetic fields, angle of incidence and polarization of incident radiation) [6][7][8][9][10]. Photonic crystal structures are used to create a wide class of radiation control devices (filters, switches, modulators), performing the function of filtering and amplifying various types of propagating waves [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The Amplification and Polarization Control of Transmitted Radiation by a Graphene-Containing Photonic Cell

Eliseeva,

Itrin,

Sementsov

2023

Photonics

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The transformation of the transmission spectra of linearly polarized radiation passing through a symmetric photonic cell is studied based on numerical analysis. The cell consists of two layers of magnetic semiconductor with a graphene monolayer on each and a central dielectric layer located between the graphene monolayers. It is possible to achieve amplification in the near terahertz range in graphene layers due to charge carrier drift. Control of transmission spectra and polarization of transmitted radiation can be achieved by changing the Fermi energy of graphene layers, by changing the external magnetic field, and by changing the thickness of the dielectric layer and the orientation of the incident radiation polarization plane.

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High-Sensitive Thermal Sensor Based on a 1d Photonic Crystal Microcavity With Nematic Liquid Crystal

Cited by 6 publications

References 34 publications

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

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

High-performance Silicon Nitride Grating-coupled SPR Sensors for Gas Detection and Biosensing

The Amplification and Polarization Control of Transmitted Radiation by a Graphene-Containing Photonic Cell

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