2 recherche sur le tag 'biosensors'   

Étude des composants à base de cristaux photoniques / Safia Arafa  

Public ISBD Titre : Étude des composants à base de cristaux photoniques : Application dans le domaine du démultiplexage et de la détection. Type de document : texte imprimé Auteurs : Safia Arafa, Auteur ; Mohamed Bouchemat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 150 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais Electronique Tags : cristaux photoniques  l'optique intégrée  biocapteurs  démultiplexeur  cavité  FDTD  Photonic crystal  integrated optics  biosensors  demultiplexer  cavity  لبلورات الضوئية  البصريات المتكاملة  أجهزة الاستشعار البيولوجية  مزيلات الدمج  التجويف Index. décimale : 621 Electronique Résumé : Nowadays, the development of biological sensors has become a major issue in order to meet the current and the future needs in diverse areas demanded. Real-time detection or analysis should be preferred and the response should be easy to read and extremely fast. In parallel, the progress of nanotechnologies and in particular those of photonic crystals, which make it possible to manipulate the light at nanometric resolution, and thus at the biomolecule scale, offers the possibility of achieving a new high-performed detection platform. In this context, this thesis aims to study and to design refractive index biosensors based on photonic crystals. The structures proposed are essentially based on a H0 cavity coupled waveguide system. The main objective of our work remains the enhancement of light confinement within the cavity area. In the first part of this work we analyze in detail the influence of the cavity geometry on the detection performances. Thus, we present a configuration based on ringed air holes to improve the detection properties. In order to integrate several detection units in the same photonic crystal platform, the wavelength division demultiplexing (WDM) technique to spatially separate the responses of the integrated biosensors will be studied: Two structures of demultiplexers based on a selective filtering will also be presented. As for the case of a single biosensor and based on this technique the configurations of classical and ringed biosensor array will be studied and simultaneously evaluated. The optical properties of these photonic structures will be numerically evaluated by performing simulations based on the finite difference time domain (FDTD) method. The obtained results indicate that the response of each sensor unit shifts independently in terms of refractive index variations. Accordingly, a sensitivity of 450 nm / RIU and a crosstalk of less than -43.78 dB have been achieved for the ringed configuration, while maintaining a quality factor as high as 5.74×104. These features make the designed structure a promising platform for performing monolithic integration and high multiplexed label-free detection. Diplôme : Doctorat En ligne : ../theses/electronique/ARA7278.pdf Format de la ressource électronique : pdf Permalink : index.php?lvl=notice_display&id=10893 Étude des composants à base de cristaux photoniques : Application dans le domaine du démultiplexage et de la détection. [texte imprimé] / Safia Arafa, Auteur ; Mohamed Bouchemat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 150 f. ; 30 cm. 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais Electronique Tags : cristaux photoniques  l'optique intégrée  biocapteurs  démultiplexeur  cavité  FDTD  Photonic crystal  integrated optics  biosensors  demultiplexer  cavity  لبلورات الضوئية  البصريات المتكاملة  أجهزة الاستشعار البيولوجية  مزيلات الدمج  التجويف Index. décimale : 621 Electronique Résumé : Nowadays, the development of biological sensors has become a major issue in order to meet the current and the future needs in diverse areas demanded. Real-time detection or analysis should be preferred and the response should be easy to read and extremely fast. In parallel, the progress of nanotechnologies and in particular those of photonic crystals, which make it possible to manipulate the light at nanometric resolution, and thus at the biomolecule scale, offers the possibility of achieving a new high-performed detection platform. In this context, this thesis aims to study and to design refractive index biosensors based on photonic crystals. The structures proposed are essentially based on a H0 cavity coupled waveguide system. The main objective of our work remains the enhancement of light confinement within the cavity area. In the first part of this work we analyze in detail the influence of the cavity geometry on the detection performances. Thus, we present a configuration based on ringed air holes to improve the detection properties. In order to integrate several detection units in the same photonic crystal platform, the wavelength division demultiplexing (WDM) technique to spatially separate the responses of the integrated biosensors will be studied: Two structures of demultiplexers based on a selective filtering will also be presented. As for the case of a single biosensor and based on this technique the configurations of classical and ringed biosensor array will be studied and simultaneously evaluated. The optical properties of these photonic structures will be numerically evaluated by performing simulations based on the finite difference time domain (FDTD) method. The obtained results indicate that the response of each sensor unit shifts independently in terms of refractive index variations. Accordingly, a sensitivity of 450 nm / RIU and a crosstalk of less than -43.78 dB have been achieved for the ringed configuration, while maintaining a quality factor as high as 5.74×104. These features make the designed structure a promising platform for performing monolithic integration and high multiplexed label-free detection. Diplôme : Doctorat En ligne : ../theses/electronique/ARA7278.pdf Format de la ressource électronique : pdf Permalink : index.php?lvl=notice_display&id=10893

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
ARA/7278	ARA/7278	Thèse	Bibliothèque principale	Thèses	Disponible

Étude de cristaux photoniques en silicium pour l'application à la biodétection / Dallel Benelarbi  

Public ISBD Titre : Étude de cristaux photoniques en silicium pour l'application à la biodétection Type de document : texte imprimé Auteurs : Dallel Benelarbi, Auteur ; Touraya Bouchemat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 120 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais Electronique Tags : cristaux photoniques  silicium  biocapteurs  guide d'onde  cavité  SOI  sensibilité  FDTD-2D  photonic crystals  silicon  biosensors  waveguide  cavity  sensitivity  البلورات الضوئية  سيليسيوم  المستشعرات الضوئية  الدليل الموجي  التجويف  .FDTD-2D  الحساسبةSOI Index. décimale : 621 Electronique Résumé : This thesis is dedicated to the study and design of new structures for optical detection. Indeed, the development of these optical devices has a growing and particular interest, particularly for targeting and identifying biological species. For this purpose, the photonic crystal-based components (CPs) have been widely exploited in the field of bio-detection. Silicon is an ideal candidate designated as a support material for the realization of these devices. In this context, new coupling techniques between waveguide and optical cavity based on planar photonic crystals, made on a silicon-on-insulator (SOI) substrate, have been developed. To do this, we are modeling these bio detectors, optimizing their key parameters such as the quality factor and sensitivity to the optical index of the external environment, using commercial software Fullwave and Crystalwave that exploit the finite difference method in the two-dimensional time domain (FDTD-2D). We first studied the parallel coupling between a resonant cavity and a waveguide (W1) for application to the detection of DNA biomolecules. The originality of this study is to consider several sensors on a single platform, and to demonstrate that each sensor could detect a target independently and without interaction with others, without losses, and this, by acting on the parameters influencing the essential characteristics, we note a high sensitivity and a low limit of detection. As for the second geometry studied, it consists of another coupling path, the latter comprises two sections of guides W1 between which has been arranged a ring cavity. We have also optimized the different structural parameters for this configuration, in order to improve the sensitivity and the quality factor in order to obtain another type of high-performance sensor, namely the temperature sensor. For this, we consider the evolution of the sensitivity as a function of the change in the temperature of the water, convincing results were noted. Diplôme : Doctorat En ligne : ../theses/electronique/BEN7253.pdf Format de la ressource électronique : pdf Permalink : index.php?lvl=notice_display&id=10845 Étude de cristaux photoniques en silicium pour l'application à la biodétection [texte imprimé] / Dallel Benelarbi, Auteur ; Touraya Bouchemat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 120 f. ; 30 cm. 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais Electronique Tags : cristaux photoniques  silicium  biocapteurs  guide d'onde  cavité  SOI  sensibilité  FDTD-2D  photonic crystals  silicon  biosensors  waveguide  cavity  sensitivity  البلورات الضوئية  سيليسيوم  المستشعرات الضوئية  الدليل الموجي  التجويف  .FDTD-2D  الحساسبةSOI Index. décimale : 621 Electronique Résumé : This thesis is dedicated to the study and design of new structures for optical detection. Indeed, the development of these optical devices has a growing and particular interest, particularly for targeting and identifying biological species. For this purpose, the photonic crystal-based components (CPs) have been widely exploited in the field of bio-detection. Silicon is an ideal candidate designated as a support material for the realization of these devices. In this context, new coupling techniques between waveguide and optical cavity based on planar photonic crystals, made on a silicon-on-insulator (SOI) substrate, have been developed. To do this, we are modeling these bio detectors, optimizing their key parameters such as the quality factor and sensitivity to the optical index of the external environment, using commercial software Fullwave and Crystalwave that exploit the finite difference method in the two-dimensional time domain (FDTD-2D). We first studied the parallel coupling between a resonant cavity and a waveguide (W1) for application to the detection of DNA biomolecules. The originality of this study is to consider several sensors on a single platform, and to demonstrate that each sensor could detect a target independently and without interaction with others, without losses, and this, by acting on the parameters influencing the essential characteristics, we note a high sensitivity and a low limit of detection. As for the second geometry studied, it consists of another coupling path, the latter comprises two sections of guides W1 between which has been arranged a ring cavity. We have also optimized the different structural parameters for this configuration, in order to improve the sensitivity and the quality factor in order to obtain another type of high-performance sensor, namely the temperature sensor. For this, we consider the evolution of the sensitivity as a function of the change in the temperature of the water, convincing results were noted. Diplôme : Doctorat En ligne : ../theses/electronique/BEN7253.pdf Format de la ressource électronique : pdf Permalink : index.php?lvl=notice_display&id=10845

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
BEN/7253	BEN/7253	Thèse	Bibliothèque principale	Thèses	Disponible