Influence of elliptical shaped holes on the sensitivity and Q factor in 2D photonic crystals sensor

Benmerkhi, Ahlem; Bouchemat, Mohamed; Bouchemat, Touraya

doi:10.1016/j.photonics.2016.03.001

Cited by 18 publications

(6 citation statements)

References 18 publications

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“…There have been efforts to achieve low group velocity beyond the brillouin zone edge. Researchers have reported modifications in the 2D feature adjacent to the waveguide like changes in radii, distance and shape [79]- [83]. Numerical investigations on properties of waveguides were also reported [84]- [86].…”

Section: Sensing Using Photonic Crystal Waveguidesmentioning

confidence: 99%

Slow-Light Enhanced Liquid and Gas Sensing Using 2-D Photonic Crystal Line Waveguides—A Review

Singhal

Paprotny

2022

IEEE Sensors J.

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Photonic Crystals (PhCs) are periodically structured dielectric materials that have attracted significant research interest in the last two decades for their ability to slow down group velocity of a propagating pulse envelope with promising sensing applications. This review paper discusses the properties of two-dimensional (2D) PhCs including the slow-light phenomenon, band-gap generation and application of these properties for gas and liquid sensing. Waveguide generation by introducing defects with light guiding and confinement is discussed. Additionally, for 2D PhC line waveguides, a comprehensive review on slow-light principle and phenomenon of slow-light enhanced sensing for gases and liquids is discussed. One-dimensional (1D) and three-dimensional (3D) PhCs are also reviewed for band-gap generation and defects in PhCs along with present fabrication challenges and future trends. Our study highlights an increase in the detection capabilities of PhC based sensors paving way for high sensitivity detectors with applications in ubiquitous monitoring of gases and liquids.

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Section: Sensing Using Photonic Crystal Waveguidesmentioning

confidence: 99%

Slow-Light Enhanced Liquid and Gas Sensing Using 2-D Photonic Crystal Line Waveguides—A Review

Singhal

Paprotny

2022

IEEE Sensors J.

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“…In recent years, a lot of research using photonic crystals as a detection element for sensing was undertaken due their confinement of light and band structure (1). Photonic crystals used as a sensor have seen massive development in case of a rising demand of sensing applications in several fields such as: security, healthcare and environment (2).…”

Section: Introductionmentioning

confidence: 99%

Novel design of optical sensor based on two-dimensional photonic crystals for the detection of volatile organic compounds that can infect human health

Ghoumazi

Hocini²,

Hameurlain

et al. 2019

Mèd Technologies J.

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Background: In recent research, optical sensors gained a growing interest motivated by the increasing need for specific sensors that allow for routine and effective measurements in several fields and analysis such as, safety, environment, and human health. Among optical sensors are photonic crystal sensors, which are characterized by high sensitivity and biocompatibility. The variations inside and around the photonic crystal can give important information by measuring the wavelength, the band gap, the output power…etc. Through defects created in photonic crystals such as missing rows of holes or rods, light is guided through and the goal is to achieve a very high sensitivity and spatial selectivity to changing superior bulk devices. In this study, we model a new structure of an optical channel drop filter (CDF) based on 2-dimensional photonic crystals to detect volatile organic compounds that can infect human health. Objective: Detect the variation of the refractive index by fixing the radius (r) at 99.37nm and the lattice constant (a) at 523nm for various volatile organic compounds such as H2CO, CH2Cl2, and C2Cl4 with refractive indexes that are: 1.3746, 1.421 and 1.503 respectively in the optical sensor based on photonic crystals for reasons related to the protection of human health. Methods: The structure is made of square lattice silicon rods immersed in air. The dielectric constant of silicon and air is 11.9716 and 1 respectively. First, we created a cross shape resonator and designed an optical channel drop filter in the heart of the structure; our method is based on plane wave expansion method (PWE) by using MATLAB software and the finite element method (F.E.M) with COMSOL software. Results: Three volatile compounds have been studied, such as Dichloromethane used as synthesis intermediate by the chemical industry or solvent used in the pharmaceutical or medical industry. Acute inhalation exposure may cause severe optic neuropathy and liver attack (Hepatitis). Then, the Methanal is used to dry or kill the skin taking as an example, the medical treatment of warts. And perchlorethylene is used for the dry cleaning of tissues and for degreasing metals because it is in category 3 carcinogens, toxic to the nervous system and the kidney. These three volatile compounds where introduced and studied in the proposed structure. The results obtained through this study are as follows:1-diagram of the TM and TE bands of the photonic crystal in a square array of silicon rods embedded in the air, 2-schematic diagram of the filter, 3-distribution of the refractive index along the structure, 4-structure meshing, 5-propagation and transmission for different refractive indices such as methanal (H2CO), dichloromethane (CH2Cl2) and perchlorethylene (C2Cl4). Conclusion:In this article, we have been able to simulate, analyze and control our proposed structure with MATLAB and COMSOL software based on the finite element method. The results show that for the three volatile organic compounds, the variation of the signal is due to the ...

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“…Several research works using the photonic crystals, have been undertaken due to their band structure and the confinement of light. Among these researches, they have proposed a new approach such as modifying L2 geometry where the nearest neighbor holes of the cavity are deformed to elliptical shape and their numbers were varied [3], by selective air-hole infiltration [4] or by modifying position and size of the holes surrounding the L3 cavity [5]. On the other hand, they have been interested on the design and optimization of the PhC cavity to realize higher Q factor and transmission of resonant wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Tunable Demultiplexer Study in 2D Square Photonic Crystal

Mirouh

Bouchemat

2019

Acta Phys. Pol. A

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We propose a novel designed structure which is a demultiplexer of 2D square photonic crystal of circular rods embedded in air that have locally three cavities with different sizes, refractive indexes, and also appropriately sized adjacent rods. Firstly, for one constant refractive index n (n = 3.3763) and with individual radius for each cavity and their adjacent rods, we have three different output resonant wavelengths; it means that this structure drops the desired wavelength depending on the geometric parameters. We have optimized this structure by varying locally the refractive index for each of the resonant cavity. In this case, we have obtained in one structure i.e. a single refractive index for all the structures except the cavities of course, three different zones with specific geometric and physical properties. As a result, three wavelengths have been extracted from these cavities. The corresponding optical transmission powers and Q factors are T1 = 83.54%, T2 = 100%, T3 = 81.97%, and Q1 = 2690.3, Q2 = 3248.8, Q3 = 8212.5, respectively. By changing both the size and refractive index of the cavity and the size of their adjacent rods, the structure is able to drop the desired wavelength, and the tunability property is achieved.

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Influence of elliptical shaped holes on the sensitivity and Q factor in 2D photonic crystals sensor

Cited by 18 publications

References 18 publications

Slow-Light Enhanced Liquid and Gas Sensing Using 2-D Photonic Crystal Line Waveguides—A Review

Slow-Light Enhanced Liquid and Gas Sensing Using 2-D Photonic Crystal Line Waveguides—A Review

Novel design of optical sensor based on two-dimensional photonic crystals for the detection of volatile organic compounds that can infect human health

Tunable Demultiplexer Study in 2D Square Photonic Crystal

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