Magnetic field sensor based on a magnetic-fluid-infiltrated photonic crystal L4 nanocavity and broadband W1 waveguide

Saker, Khadidja; Bouchemat, Touraya; Lahoubi, Mahieddine; Bouchemat, Mohamed; Pu, Shengli

doi:10.1007/s10825-019-01315-5

Cited by 14 publications

(4 citation statements)

References 49 publications

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“…However, it was confirmed that the change of ambient temperature and MF temperature can be inferred from the inverse matrix based on the data of changing both ambient temperature and MF temperature. In this work, we focus on realization of measuring three parameters by infiltrating MFs, and especially distinguishing MF cavity temperature and ambient temperature, sensitivities are not necessarily superior to other works [19] [24] [36]. In order to further improve the sensitivity of the sensor, MFs with larger RI responsivity to magnetic field can be employed.…”

Section: Resultsmentioning

confidence: 99%

A Multi-Parameter Sensor Based on Cascaded Photonic Crystal Cavities Filled with Magnetic Fluid

Zhao¹,

Su²,

Li³

2020

OPJ

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A kind of photonic crystal (PC) micro-cavity sensor based on magnetic fluid (MF) filling is designed with simulation model. Generally, many sensors' designs are based on a universal temperature in the whole structure. However, strong photothermal effect in high Q micro-cavities will lead to different temperatures between cavities and environment inevitably. In many theoretical PC sensor designs, researchers neglected the different temperature between environment and cavities. This simple hypothesis will probably lead to failure of sensor design and get wrong temperature. Moreover, few theoretical or experimental works have been done to study optical cavity's heating process and temperature. We propose that researchers should take seriously about this point. Here, the designed cascaded micro-cavity structure has three spectral lines and a reversible sensitivity matrix, which can simultaneously detect magnetic field, ambient temperature and MF micro-cavity temperature. It can solve the magnetic field and temperature cross-sensitivity problem, and further, distinguish the different temperatures of environment and magnetic fluid cavities. The influence of hole radius and slab thickness on the depth and Q value of the resonant spectral line are also studied. Responses of three dips to magnetic field, ambient temperature and MF micro-cavity temperature are simulated, respectively, where dip 1 belongs to MF cavity 1, dip 2 and dip 3 belong to MF cavity 2. The obtained magnetic field sensitivities are 2.89 pm/Oe, 4.57 pm/Oe, and 5.14 pm/Oe, respectively; the ambient temperature sensitivities are 65.51 pm/K, 50.94 pm/K, and 58.98 pm/K, respectively; and the MF micro-cavity temperature sensitivities are −14.41 pm/K, −17.06 pm/K , and −18.81 pm/K, respectively.

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Section: Resultsmentioning

confidence: 99%

A Multi-Parameter Sensor Based on Cascaded Photonic Crystal Cavities Filled with Magnetic Fluid

Zhao¹,

Su²,

Li³

2020

OPJ

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“…A detailed comparison with other PhC sensors is carried out in terms of sensitivity, sensing range, and DR, as shown in table 1. Compared to most of 1D and 2D SiO 2 /Si PhC sensors [17,21,29,[46][47][48][49][50], our design has a higher sensitivity dual to the stronger light-localization of microcavity. Although the point-or linedefect construction can improve the sensitivity [46], the detectable RI range is too narrow so the sensing for low or high RI index analyte is limited.…”

Section: Effects Of Microcavity Size On the Sensor Performancementioning

confidence: 99%

Ultrawide-detection-range refractive index sensor based on a two-dimensional mirror-image photonic crystal microcavity

Sheng,

She,

et al. 2024

Phys. Scr.

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In this work, a refractive index sensor is theoretically proposed based on a two-dimensional mirror-image SiO2/Si photonic crystal microcavity. The introduction of mirror-image microcavity effectively enhances the light localization and the coupling between light and liquid analyte. Results show that the sensor exhibits a high near-linear sensitivity of 493.5 nm/RIU with a narrow full-width at half-maximum of ~ 20 nm in a broad refractive index range of 1.0 ~ 1.5. Moreover, the detection resolution for the minimum variation of RI reaches to a level of 0.0002 RIU. For the analyses on the sensor performance (such as sensitivity, full-width at half-maximum), the dependences of all structure parameters are discussed in terms of the cylinder diameter, lattice constant, and microcavity size. This design is expected to detect the refractive index of wide-range liquid analytes in the fields of biology, chemistry, and medicine.

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“…An alternative strategy in biosensing involves the utilization of Lx resonators with very high Q -factors, where ‘X’ denotes the count of removed air holes in a hexagonal network. For instance, when X = 4, results yielded a Q -factor of more than 8600 and a sensitivity of approximately 147 nm/RIU [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Design of a High Q-Factor Label-Free Optical Biosensor Based on a Photonic Crystal Coupled Cavity Waveguide

Jannesari,

Pühringer,

Stocker

et al. 2023

Sensors

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In recent years, there has been a significant increase in research into silicon-based on-chip sensing. In this paper, a coupled cavity waveguide (CCW) based on a slab photonic crystal structure was designed for use as a label-free biosensor. The photonic crystal consisted of holes arranged in a triangular lattice. The incorporation of defects can be used to design sensor devices, which are highly sensitive to even slight alterations in the refractive index with a small quantity of analyte. The plane wave expansion method (PWE) was used to study the dispersion and profile of the CCW modes, and the finite difference time domain (FDTD) technique was used to study the transmission spectrum, quality factor, and sensitivity. We present an analysis of adiabatically coupling light into a coupled cavity waveguide. The results of the simulation indicated that a sensitivity of 203 nm/RIU and a quality factor of 13,360 could be achieved when the refractive indices were in the range of 1.33 to 1.55.

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Magnetic field sensor based on a magnetic-fluid-infiltrated photonic crystal L4 nanocavity and broadband W1 waveguide

Cited by 14 publications

References 49 publications

A Multi-Parameter Sensor Based on Cascaded Photonic Crystal Cavities Filled with Magnetic Fluid

A Multi-Parameter Sensor Based on Cascaded Photonic Crystal Cavities Filled with Magnetic Fluid

Ultrawide-detection-range refractive index sensor based on a two-dimensional mirror-image photonic crystal microcavity

Design of a High Q-Factor Label-Free Optical Biosensor Based on a Photonic Crystal Coupled Cavity Waveguide

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