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Partager le résultat de cette recherche Interroger des sources externesConception de micro-nanocavités à base de cristaux photoniques en silicium et nitrure de silicium en vue d’application en optique intégrée et non linéaire. / Lazhar Kassa-Baghdouche
Titre : Conception de micro-nanocavités à base de cristaux photoniques en silicium et nitrure de silicium en vue d’application en optique intégrée et non linéaire. Type de document : texte imprimé Auteurs : Lazhar Kassa-Baghdouche, Auteur ; T. Boumaza, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 152 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Cristaux photoniques planaires Cavit´es optiques PWE-3D FDTD-3D Circuits photoniques intégrés non-linéarités optiques Capteurs optiques Facteur de qualité
(Q) Volume modal (V ) SOI structures hybrides (Si-PS) silicium nitrure de siliciumIndex. décimale : 621 Electronique Résumé : The ability to develop innovative photonic devices enabling the controlling of the flow
of light at the nanoscale, has motivated a growing interest. In particular, planar photonic
crystal cavities (PhCs) based structures are promising candidates for such applications.
The aim of this thesis is to study and design silicon (Si) and silicon nitride (SiN)-based
planar photonic crystal (PhC) micro-nanocavities (planar technology). These cavities were
designed to reduce the radiation losses (improve the quality factor Q) and strong confinement of the light (reduce the mode volume V ). First, we studied the dispersion diagram
of photonic band-gap structures incorporated into a planar optical waveguide. Numerical
models by plane waves (PWE-3D) are developed, the aim is to optimize the geometrical
parameters of lattice of air holes etched in a layer of silicon (Si) or silicon nitride (SiN)
that gives a wide band gap. In order to explore the potential of planar structures to strong
vertical confinement of the light, different configurations were proposed and studied to
determine the impact of symmetry and refractive index of the cladding on the band-gap.
Next, we study and design micro-nanocavities implemented in a planar photonic crystal
surrounded with various high and low refractive index cladding materials. Such structures
can be used both in integrated and non linear optics. We have shown theoretically that,
at the wavelength scale, the physics of light confinement in the vertical direction is substantially controlled by the geometry of the surrounding (bottom and top) claddings. We
have also studied and designed hybrid (Si-PS) and silicon nitride (SiN) cavities realized
in planar PhC suspended on a silicon-on-insulator substrate (SOI). Such cavities show
efficient nonlinear optical properties. The design of the proposed cavities is based on an
engineering technique of defect which consists of tuning the position and radius of the lateral, upper, and lower boundary holes near the cavity edge. This technique allows to give
a gradual change of the envelope function of the electric field at the edges of the cavity.
This latter allows to minimizes the radiative component in the light cone and reduce the
optical loss in the vertical direction. Interesting and important results are reported for the
design of cavities with high (Q/V ). Furthermore, the small perturbations theory enables
to determine the shift of the resonant wavelength of the proposed cavities induced by a
small change of the dielectric constant of the order of 10−4. The optical sensitivity of the
optimized cavities was studied and discussed in the case of the presence of different gaseous
environments and temperature change. Due to their high quality factor and small mode
volume, we have shown that the optimized cavities are well suited for the design of Gas
and temperature sensor operating both in the visible and mid-infrared range.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/KAS7063.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10538 Conception de micro-nanocavités à base de cristaux photoniques en silicium et nitrure de silicium en vue d’application en optique intégrée et non linéaire. [texte imprimé] / Lazhar Kassa-Baghdouche, Auteur ; T. Boumaza, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 152 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Cristaux photoniques planaires Cavit´es optiques PWE-3D FDTD-3D Circuits photoniques intégrés non-linéarités optiques Capteurs optiques Facteur de qualité
(Q) Volume modal (V ) SOI structures hybrides (Si-PS) silicium nitrure de siliciumIndex. décimale : 621 Electronique Résumé : The ability to develop innovative photonic devices enabling the controlling of the flow
of light at the nanoscale, has motivated a growing interest. In particular, planar photonic
crystal cavities (PhCs) based structures are promising candidates for such applications.
The aim of this thesis is to study and design silicon (Si) and silicon nitride (SiN)-based
planar photonic crystal (PhC) micro-nanocavities (planar technology). These cavities were
designed to reduce the radiation losses (improve the quality factor Q) and strong confinement of the light (reduce the mode volume V ). First, we studied the dispersion diagram
of photonic band-gap structures incorporated into a planar optical waveguide. Numerical
models by plane waves (PWE-3D) are developed, the aim is to optimize the geometrical
parameters of lattice of air holes etched in a layer of silicon (Si) or silicon nitride (SiN)
that gives a wide band gap. In order to explore the potential of planar structures to strong
vertical confinement of the light, different configurations were proposed and studied to
determine the impact of symmetry and refractive index of the cladding on the band-gap.
Next, we study and design micro-nanocavities implemented in a planar photonic crystal
surrounded with various high and low refractive index cladding materials. Such structures
can be used both in integrated and non linear optics. We have shown theoretically that,
at the wavelength scale, the physics of light confinement in the vertical direction is substantially controlled by the geometry of the surrounding (bottom and top) claddings. We
have also studied and designed hybrid (Si-PS) and silicon nitride (SiN) cavities realized
in planar PhC suspended on a silicon-on-insulator substrate (SOI). Such cavities show
efficient nonlinear optical properties. The design of the proposed cavities is based on an
engineering technique of defect which consists of tuning the position and radius of the lateral, upper, and lower boundary holes near the cavity edge. This technique allows to give
a gradual change of the envelope function of the electric field at the edges of the cavity.
This latter allows to minimizes the radiative component in the light cone and reduce the
optical loss in the vertical direction. Interesting and important results are reported for the
design of cavities with high (Q/V ). Furthermore, the small perturbations theory enables
to determine the shift of the resonant wavelength of the proposed cavities induced by a
small change of the dielectric constant of the order of 10−4. The optical sensitivity of the
optimized cavities was studied and discussed in the case of the presence of different gaseous
environments and temperature change. Due to their high quality factor and small mode
volume, we have shown that the optimized cavities are well suited for the design of Gas
and temperature sensor operating both in the visible and mid-infrared range.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/KAS7063.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10538 Exemplaires
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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) Tags : cristaux photoniques silicium biocapteurs guide d'onde cavité SOI sensibilité FDTD-2D photonic crystals silicon biosensors waveguide cavity sensitivity ???????? ??????? ???????? ?????????? ??????? ?????? ?????? ??????? .FDTD-2D ????????SOI 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 : Permalink : https://bu.umc.edu.dz/md/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 . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 120 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : cristaux photoniques silicium biocapteurs guide d'onde cavité SOI sensibilité FDTD-2D photonic crystals silicon biosensors waveguide cavity sensitivity ???????? ??????? ???????? ?????????? ??????? ?????? ?????? ??????? .FDTD-2D ????????SOI 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 : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10845 Exemplaires
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