Détail de l'auteur
Auteur Mohamed Bouchemat |
Documents disponibles écrits par cet auteur (5)
Affiner la recherche Interroger des sources externes
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
ElectroniqueTags : 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 : 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
ElectroniqueTags : 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 : 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 théorique d’un capteur à base d’une structure originale en cristaux photoniques. / Chayma Mosbah
Titre : Étude théorique d’un capteur à base d’une structure originale en cristaux photoniques. Type de document : texte imprimé Auteurs : Chayma Mosbah, Auteur ; Mohamed Bouchemat, Directeur de thèse ; Ahlem Benmerkhi, Directeur de thèse Mention d'édition : 10/12/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 140 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Electronique: Micro et Nanotechnologies Cristaux photoniques Microcavités Capteurs à indice de réfraction facteur de qualité Sensibilité FDTD "
photonic crystal microcavity refractive index sensors quality factor sensitivity البلورات الضوئية فجوة استشعار معامل الانكسار الحساسيةIndex. décimale : 621 Electronique Résumé :
In this thesis we consider the study and the design of new structures of refractive index sensors based on two-dimensional photonic crystals, and in particular their exploitation in detection domain. The proposed structures are focalized particularly for detecting the refractive index variation. They consist of a guide / cavity coupling according to two configurations. The first configuration consists of a linear coupling (filter). The second configuration is based on a lateral coupling which consists of a juxtaposed linear cavity parallel to the waveguide. Another original structure proposed consists of an air-slot width-modulated line-defect microcavity.
Simulations are performed using the BandSOLVE and FullWAVE simulation software developed by RSoft, based on the Plane Wave Method (PWE) and the Finite Difference Time Domain method (FDTD), respectively. Firstly, we are optimized the quality factor and the transmission, modifying the physical and geometric key parameters of the structure such as: size, position and shape of holes. We studied the sensitivity by optimizing the detection performance (sensitivity and detection limit). To do this, we introduced an air slot in the cavity center. This configuration makes it possible to considerably increase the light-matter interaction and induces a strong confinement of the light within the cavity. Obtained results concerning the sensitivity are convincing: S = 400
nm / RIU: this structure can be used as an index variation sensor.
Diplôme : Doctorat En ligne : ../theses/electronique/MOS7690.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11524 Étude théorique d’un capteur à base d’une structure originale en cristaux photoniques. [texte imprimé] / Chayma Mosbah, Auteur ; Mohamed Bouchemat, Directeur de thèse ; Ahlem Benmerkhi, Directeur de thèse . - 10/12/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 140 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Electronique: Micro et Nanotechnologies Cristaux photoniques Microcavités Capteurs à indice de réfraction facteur de qualité Sensibilité FDTD "
photonic crystal microcavity refractive index sensors quality factor sensitivity البلورات الضوئية فجوة استشعار معامل الانكسار الحساسيةIndex. décimale : 621 Electronique Résumé :
In this thesis we consider the study and the design of new structures of refractive index sensors based on two-dimensional photonic crystals, and in particular their exploitation in detection domain. The proposed structures are focalized particularly for detecting the refractive index variation. They consist of a guide / cavity coupling according to two configurations. The first configuration consists of a linear coupling (filter). The second configuration is based on a lateral coupling which consists of a juxtaposed linear cavity parallel to the waveguide. Another original structure proposed consists of an air-slot width-modulated line-defect microcavity.
Simulations are performed using the BandSOLVE and FullWAVE simulation software developed by RSoft, based on the Plane Wave Method (PWE) and the Finite Difference Time Domain method (FDTD), respectively. Firstly, we are optimized the quality factor and the transmission, modifying the physical and geometric key parameters of the structure such as: size, position and shape of holes. We studied the sensitivity by optimizing the detection performance (sensitivity and detection limit). To do this, we introduced an air slot in the cavity center. This configuration makes it possible to considerably increase the light-matter interaction and induces a strong confinement of the light within the cavity. Obtained results concerning the sensitivity are convincing: S = 400
nm / RIU: this structure can be used as an index variation sensor.
Diplôme : Doctorat En ligne : ../theses/electronique/MOS7690.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11524 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MOS/7690 MOS/7690 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude théorique des propriétés magnéto-optiques de cristaux magnéto photoniques à structure ferrite grenat de bismuth (BIG) Type de document : texte imprimé Auteurs : Hamza Otmani, Auteur ; Mohamed Bouchemat, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 147 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Cristaux magnéto photoniques conversion de modes TE-TM effet faraday isolateur optique Magneto photonic crystals mode conversion TE-TM Faraday Effect optical isolators البلورات المغناطيسية الضوئية تحويل الوضع TE-TM تأثير فاراداي العوازل البصرية Index. décimale : 621 Electronique Résumé : Laser sources are the most important elements in a channel of optical telecommunications.
However these are unstable, and have fluctuations. To overcome this drawback it is necessary to place an optical isolator in the output of the cavity which will eliminate reflections.
Photonic crystals are materials whose optical properties are used to manipulate the light across the wavelength. These crystals are structures whose refractive index varies periodically in one, two or three directions in space.
When combined magneto-optical materials and photonic crystals, it appears the new components based on magneto photonic crystals, which exalt the non-reciprocal effects of the propagation.
This work is a contribution to digital studies magneto photonic crystals, we simulated planar structures of photonic band gap materials we focus on their physical properties such as Bands diagram and Gaps map.
These simulations are designed to check the position of the photonic band gap in the studied structure. Our structure is a planar photonic crystal consisting of a magneto-optical material layer referred to as BIG (bismuth garnet ferrite or called bismuth iron garnet) deposited on a layer of GGG (gadolinium garnet and gallium), in a triangular structure and then for a square structure. We study the optical fibres in BIG material, it begins with a conventional optical fibre structure, and we move to a study of magneto photonic crystal fibre based BIG. It was these simulations to study the mode coupling TE-TM, which is originally identical to the Faraday rotation to obtain a non-reciprocal effect in guided configuration.
By varying the gyrotropy, we observed its effect on the coupling efficiency, and changes in other physical parameters affect the conversion rate TE-TM. The coupling output of TE-TM depends on the birefringence and Faraday rotation, for this we made another simulation to determine the birefringence and consequently to find the Faraday rotation which is the main objective of our work. To perform these simulations we used two software of Rsoft CAD, the first module is called BandSOLVE which is based on the plane wave method (PWE), and the second called BeamPROP, based on the beam propagation method (BPM).
We show a significant increase of the Faraday rotation which improves the performance of the optical isolators.
Diplôme : Doctorat En ligne : ../theses/electronique/OTM6745.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9871 Etude théorique des propriétés magnéto-optiques de cristaux magnéto photoniques à structure ferrite grenat de bismuth (BIG) [texte imprimé] / Hamza Otmani, Auteur ; Mohamed Bouchemat, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 147 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Cristaux magnéto photoniques conversion de modes TE-TM effet faraday isolateur optique Magneto photonic crystals mode conversion TE-TM Faraday Effect optical isolators البلورات المغناطيسية الضوئية تحويل الوضع TE-TM تأثير فاراداي العوازل البصرية Index. décimale : 621 Electronique Résumé : Laser sources are the most important elements in a channel of optical telecommunications.
However these are unstable, and have fluctuations. To overcome this drawback it is necessary to place an optical isolator in the output of the cavity which will eliminate reflections.
Photonic crystals are materials whose optical properties are used to manipulate the light across the wavelength. These crystals are structures whose refractive index varies periodically in one, two or three directions in space.
When combined magneto-optical materials and photonic crystals, it appears the new components based on magneto photonic crystals, which exalt the non-reciprocal effects of the propagation.
This work is a contribution to digital studies magneto photonic crystals, we simulated planar structures of photonic band gap materials we focus on their physical properties such as Bands diagram and Gaps map.
These simulations are designed to check the position of the photonic band gap in the studied structure. Our structure is a planar photonic crystal consisting of a magneto-optical material layer referred to as BIG (bismuth garnet ferrite or called bismuth iron garnet) deposited on a layer of GGG (gadolinium garnet and gallium), in a triangular structure and then for a square structure. We study the optical fibres in BIG material, it begins with a conventional optical fibre structure, and we move to a study of magneto photonic crystal fibre based BIG. It was these simulations to study the mode coupling TE-TM, which is originally identical to the Faraday rotation to obtain a non-reciprocal effect in guided configuration.
By varying the gyrotropy, we observed its effect on the coupling efficiency, and changes in other physical parameters affect the conversion rate TE-TM. The coupling output of TE-TM depends on the birefringence and Faraday rotation, for this we made another simulation to determine the birefringence and consequently to find the Faraday rotation which is the main objective of our work. To perform these simulations we used two software of Rsoft CAD, the first module is called BandSOLVE which is based on the plane wave method (PWE), and the second called BeamPROP, based on the beam propagation method (BPM).
We show a significant increase of the Faraday rotation which improves the performance of the optical isolators.
Diplôme : Doctorat En ligne : ../theses/electronique/OTM6745.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9871 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité OTM/6745 OTM/6745 Thèse Bibliothèque principale Thèses Disponible
Titre : Modelisation de l’influence des parametres physiques et geometriques dans des structures periodiques : Application à un démultiplexeur. Type de document : texte imprimé Auteurs : Fatima-Zohra Mirouh, Auteur ; Mohamed Bouchemat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 134 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Electronique: Optique Bande interdite photonique démultiplexeurs guides d'onde microcavité filtres photonic bandgap demultiplexers waveguide microcavity filters الأشرطة الممنوعة منتقي أطوال الموجات موجه الموجة وميكرو فجوة المرشحات Index. décimale : 621 Electronique Résumé :
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.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/MIR7630.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11465 Modelisation de l’influence des parametres physiques et geometriques dans des structures periodiques : Application à un démultiplexeur. [texte imprimé] / Fatima-Zohra Mirouh, Auteur ; Mohamed Bouchemat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2020 . - 134 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Electronique: Optique Bande interdite photonique démultiplexeurs guides d'onde microcavité filtres photonic bandgap demultiplexers waveguide microcavity filters الأشرطة الممنوعة منتقي أطوال الموجات موجه الموجة وميكرو فجوة المرشحات Index. décimale : 621 Electronique Résumé :
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.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/MIR7630.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11465 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MIR/7630 MIR/7630 Thèse Bibliothèque principale Thèses Disponible
Titre : Modélisation d'un photodétecteur dans une chaine de transmission par fibre optique : Applications aux composants optohyperfréquences Type de document : texte imprimé Auteurs : Samia Aib ; Mohamed Bouchemat, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique Année de publication : 2008 Importance : 68 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Phototransistor a hétérostructure(HPT), le gain optohyperfréquence, les paramètres S, modélisation d'un phototransistor. Index. décimale : 621 Electronique En ligne : ../theses/electronique/AIB5208.pdf Permalink : index.php?lvl=notice_display&id=2740 Modélisation d'un photodétecteur dans une chaine de transmission par fibre optique : Applications aux composants optohyperfréquences [texte imprimé] / Samia Aib ; Mohamed Bouchemat, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique . - 2008 . - 68 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Phototransistor a hétérostructure(HPT), le gain optohyperfréquence, les paramètres S, modélisation d'un phototransistor. Index. décimale : 621 Electronique En ligne : ../theses/electronique/AIB5208.pdf Permalink : index.php?lvl=notice_display&id=2740 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité AIB/5208 AIB/5208 Thèse Bibliothèque principale Thèses Disponible
