Elongated-Hexagonal Photonic Crystal for Buffering, Sensing, and Modulation

Elshahat, Sayed; Abood, Israa; Liang, Zixian; Pei, Jihong; Ouyang, Zhengbiao

doi:10.3390/nano11030809

Cited by 6 publications

(3 citation statements)

References 47 publications

(31 reference statements)

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“…In sensor devices, the sensitivity (S), the quality factor (Q), and the figure of merit (FOM ) are vital parameters for evaluating the ability and performance of the sensor [14]. S measures the shift of the resonance wavelength ∆l produced during the change in refractive index n ∆ and can be expressed as [25] S n , ∆ ∆ / l = nm/RIU. The FOM can be defined as the ratio of S to FWHM, FOM S FWHM, / = RIU .…”

Section: =mentioning

confidence: 99%

Multifunctional topological photonic crystal device for multichannel frequency routing and highly sensitive refractive index sensing

AbdelAll,

Almokhtar,

Khouqeer

et al. 2024

Phys. Scr.

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We propose a novel photonic crystal (PC) structure with C-4 symmetry of the square lattice that utilizes topological edge states (TESs) to achieve multichannel frequency routing and high-sensitivity refractive index (RI) sensing. The proposed system combines trivial and nontrivial unit cells to form a unique lattice arrangement that supports multiple TESs. These states enable the realization of seven distinct output ports, each capable of transmitting a specific frequency, significantly enhancing optical communication systems' bandwidth and data transfer capabilities. This feature makes the proposed PC structure an ideal candidate for multichannel frequency routing applications. Additionally, the structure incorporates a central cavity that exhibits robust light localization, making it highly sensitive to changes in the surrounding medium's refractive index. Simulations demonstrate that the proposed structure can achieve RI sensing sensitivity of up to 721 nm/RIU, coupled with a high-quality factor exceeding 10^5. With its exceptional RI sensing capabilities, the proposed multichannel PC device holds immense potential for various technological advancements in frequency routing.

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Section: =mentioning

confidence: 99%

Multifunctional topological photonic crystal device for multichannel frequency routing and highly sensitive refractive index sensing

AbdelAll,

Almokhtar,

Khouqeer

et al. 2024

Phys. Scr.

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“…Due to the advantages of sensor applications, optical sensors have gained remarkable interest and popularity as promising sensors due to their particular properties, for example, immunity to electromagnetic interference, high speed and remote sensing ability, long-distance monitoring, and fast response [ 13 ]. In addition, another feature that will be focused on which is generating hybrid resonance mode due to the strong optical localization of defect mode at the topological edge area.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Topological Photonic Crystal Mirror Heterostructure for Sensing

et al. 2021

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A paradigm for high-quality factor (Q) with a substantial fulfillment for appraising sensing ability and performance has been investigated. Through constructing a 1D (one-dimensional) topological photonic crystal (PhC) mirror heterostructure, which is formed by the image view of 1D topological PhC stacking with its original one. In the 1D topological PhC-mirror heterostructure, there is an interesting mode that appeared with the symmetric, typical Lorentzian-line shape with 100% transmittance in the topological mirror edge-state mode (hybrid resonance mode) at the heterostructure interface. Physically, such a mode is a defect mode, but the defect is introduced through topological operations. The high Q-factor of 5.08 × 104 is obtained due to the strong optical localization of the defect mode at the topological edge area. Consequently, this device acts as a narrow passband filter. Moreover, due to the narrow bandpass property, it may be an advantageous reference for many applications in filtering, switching, and sensing. Thus, introducing an electro-optical (EO) polymer layer at the interface to modify the edge defect can tune the defect mode both in frequency and Q-factor for higher spatial pulse compression and higher EO sensitivity. Accordingly, the Q-factor of 105, the sensitivity of 616 nm/RIU, and the figure of merit of 49,677.42 RIU−1 are obtained. The sensing ability and performance are attributable to the strong optical localization in the interface region and enhanced light-matter interaction. We predict that the 1D topological PhC mirror heterostructure will be an outstanding point in the field of optical sensing, filters, and optical switching in different fields.

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“…An innovative player in the area of optical sensors is slotted photonic crystal [13][14][15][16][17][18][19][20][21][22][23][24]. Slotted photonic crystals are usually fabricated in silicon-on-insulator substrates to squeeze light down into very small volumes of air.…”

Section: Introductionmentioning

confidence: 99%

High-Sensitive Mid-Infrared Photonic Crystal Sensor Using Slotted-Waveguide Coupled-Cavity

Tayoub¹,

Hocini²,

Harhouz³

2021

PIER M

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In this paper, a novel high-sensitive mid-infrared photonic crystal-based slotted-waveguide coupled-cavity sensor to behave as a refractive index sensing device is proposed at a mid-infrared wavelength of 3.9 µm. We determine the sensitivity of our sensor by detecting the shift in the resonance wavelength as a function of the refractive index variations in the region around the cavity. Comparison shows that mid-infrared photonic crystal-based slotted-waveguide coupled-cavity has higher sensitivity to refractive index changes than mid-infrared photonic crystal-based slotted-waveguide. The sensitivity can be improved from 938 nm/per refractive index unit (RIU) to 1161 nm/RIU within the range of n = 1-1.05 with an increment of 0.01 RIU in the wavelength range of 3.3651 µm to 4.1198 µm by creating a microcavity within the proposed structure, calculated quality factor (Q-factor) of 1.0821 × 10 7 giving a sensor figure of merit (FOM) up to 2.917×10 6 , and a low detection limit of 3.9×10 −6 RIU. Furthermore, an overall sensitivity is calculated to be around S = 1343.2 nm/RIU for the case of higher refractive indices of analytes within the range of n = 1-1.2 with an increment of 0.05 RIU. The described work and the achieved results by performing 2D-finite-difference time-domain (2D-FDTD) simulations confirm the ability to realize a commercially viable miniaturized and highly sensitive mid-infrared photonic crystalbased slotted-waveguide coupled-cavity sensor.

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Elongated-Hexagonal Photonic Crystal for Buffering, Sensing, and Modulation

Cited by 6 publications

References 47 publications

Multifunctional topological photonic crystal device for multichannel frequency routing and highly sensitive refractive index sensing

Multifunctional topological photonic crystal device for multichannel frequency routing and highly sensitive refractive index sensing

One-Dimensional Topological Photonic Crystal Mirror Heterostructure for Sensing

High-Sensitive Mid-Infrared Photonic Crystal Sensor Using Slotted-Waveguide Coupled-Cavity

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