Literatura académica sobre el tema "Nanocavité optique"
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Artículos de revistas sobre el tema "Nanocavité optique"
Aree, Thammarat. "Supramolecular Complexes of β-Cyclodextrin with Clomipramine and Doxepin: Effect of the Ring Substituent and Component of Drugs on Their Inclusion Topologies and Structural Flexibilities". Pharmaceuticals 13, n.º 10 (29 de septiembre de 2020): 278. http://dx.doi.org/10.3390/ph13100278.
Texto completoMeddeb, Hosni, Kai Gehrke y Martin Vehse. "Optical design and bandgap engineering in ultrathin multiple quantum well solar cell featuring photonic nanocavity". Progress in Photovoltaics: Research and Applications, 9 de abril de 2024. http://dx.doi.org/10.1002/pip.3802.
Texto completoTesis sobre el tema "Nanocavité optique"
Renaut, Claude. "Nanopinces optiques sur puce pour la manipulation de particules diélectriques". Thesis, Dijon, 2014. http://www.theses.fr/2014DIJOS010/document.
Texto completoOn chips optical nanocavities have become useful tools for trapping and manipulation of colloidal objects. In this thesis we study the nanocavities as building blocks for optical forces, trapping and handling of particles. Proof of concept of trapping dielectric microspheres appears as the starting point of the development of lab on chip. In the first chapter we go through the literature of optical forces in free space and integrated optics. The second chapter presents the experimental tools for the characterization of nanocavities and the set-up developed to perform optical measurements with the colloidal particles. The third chapter describes the proof-of-concept trapping of polystyrene particles of 500 nm, 1 and 2 µm. In the following chapter we analyze the particle trapping as function of the injected power into the cavities. The chapter five gives some examples of the possibilities of particles handling functions with coupled cavities. Eventually, in the last chapter we show assemblies of particles on different geometry of cavities studied in this thesis
Pin, Christophe. "Piégeage et manipulation d'objets colloïdaux à l'aide de structures photoniques en silicium intégrées dans des puces optofluidiques". Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOS060/document.
Texto completoNear-field optical forces arise from evanescent electromagnetic fields, such as in the near-field of photonic waveguides and nanocavities where light is highly confined. These contactless forces can be advantageously used to trap and manipulate micro- and nano-objects in solution. This thesis aims at studying these intriguing interactions and investigating their potential applications. The first chapter is an introduction to the fields of colloidal systems and optical trapping, more especially using near-field optical forces. The second chapter presents the experimental setup and the process used to fabricate optofluidic chips with microfluidic channels. The trapping potential experienced by 2 $µm$, 1 $µm$, and 500 $nm$ microbeads at the surface of a photonic nanocavity is studied in the third chapter. Our results lead to the concept of optofluidic near-field optical microscopy. In the fourth chapter, we study the dynamics and the manipulation of trapped microbeads clusters in fluidic flows. The last chapter focuses on the trapping and the manipulation of microbeads at the surface of waveguides using copropagating modes
Lenglé, Kévin. "Traitement tout optique du signal à base de composants à cristaux photoniques en matériaux semiconducteurs III-V". Thesis, Rennes 1, 2013. http://www.theses.fr/2013REN1S104/document.
Texto completoThis thesis is devoted to the experimental study of optical processing functions, of wavelength multiplexed (WDM) or time multiplexed (OTDM) signals, based on III-V semiconductors photonic crystals (PhC) devices produced in the European project Copernicus. The unique dispersive properties that is possible to obtain in such a structure were studied through nonlinear effects enhanced in slow light regime. Thus, a study of four-wave mixing was performed with high bit rate wavelength conversion and time demultiplexing applications. Moreover, second harmonic generation has been demonstrated with record efficiency for such a structure, and applied to 42.5 Gbit/s telecom signals monitoring. PhC nanocavities were used as wavelength drop filter to demonstrate 100 Gbit/s WDM signal demultiplexing. Thereafter, we worked on hybrid photonic platform. The heterogeneous integration of III-V PhC nanocavity on silicon waveguide allowed us to perform very fast optical switching, applied to wavelength conversion up to 20 Gbit/s and power limiting function at 10 Gbit/s. All of these results are very promising for future photonic integration with micro-electronics and CMOS technology. Through this work, we show that PhC, owing to their confinement and slow light properties, are structures particularly interesting to perform optical processing functions
Finazzer, Matteo. "Boîtes quantiques accordées par contrainte mécanique et nanostructures photoniqueslarge bande pour le traitement quantique de l'information". Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALY014.
Texto completoBright and tunable sources of indistinguishable single photons are key devices for photonic quantum information technologies. Building such a source with a semiconductor quantum dot (QD) requires a “knob” to tune the QD emission wavelength combined with a broadband photonic structure for light extraction. This thesis reports several important steps towards this goal.We first investigate a nanocylinder cavity, a photonic structure that, despites its simplicity, offers a pronounced Purcell acceleration of spontaneous emission over a large spectral bandwidth. We demonstrate the first resonant optical spectroscopy of a QD embedded in a nanopost cavity, by leveraging a cross-polarization scheme that efficiently suppresses stray laser light (collaboration with the group of Richard Warburton). This technique enabled a precise characterization of the optical properties of the emitter.We next demonstrate a tunable single-photon source based on a QD embedded in a tapered photonic wire. In our device, a set of on chip electrodes biased with a DC voltage applies an electrostatic force to the wire. As the wire bends, the resulting mechanical strain changes the bandgap energy of the embedded QDs. We demonstrate both a large increase and a large decrease of the QD emission wavelength by controlling the wire bending direction.With an AC voltage, the above-mentioned actuation scheme can also excite the vibration modes of the nanowire. This capability is interesting in the context of hybrid nanomechanics. In our experiments, we leverage the QD photoluminescence to detect and identify the wire mechanical vibrations. In particular, we evidence a high-order flexural mode that resonates at 190 MHz, a value that exceeds the QD radiative rate. This constitutes an important step towards the spectrally-resolved-sidebands regime.The devices demonstrated in this work open promising prospects for the future developments of quantum photonics and hybrid nanomechanics
Chateiller, Quentin. "Couplage cohérent de nanocavités optiques hydrides actives". Thesis, Université de Paris (2019-....), 2020. https://theses.md.univ-paris-diderot.fr/CHATEILLER_Quentin_va2.pdf.
Texto completoIn a time where computing resources and telecommunications requirements are exploding all around the world, the microelectronics industry has undertook over the past decade a major turnaround in their course to keep answering to the emerging technological needs of our societies. One of the ways undertaken is based on integrated photonics, which in particular requires the development of robust and energy efficient light sources at the nanoscale, with advanced optical functionalities. In this thesis, we propose a new concept of laser source emitting at 1550 nm, based on a system composed with two identical active optical nanocavities made of photonic crystal, coupled evanescently to a common waveguide. The coupling phase is then directly controlled by their relative distance. This system is fabricated by bonding a heterostructure of quantum wells in III-V semiconductor on an optical silicon circuit, followed by an electronic lithography and an ICP etching. In the context of an identical pumping, we thus demonstrated theoretically and experimentally the existence of two symmetrical and anti-symmetrical coupled modes, characterized by a splitting both in losses and in energy. The existence of a dark mode has also been predicted, which blocks the emission in the waveguide at particular coupling phases. More generally, the emission characteristics of this system allow us to assimilate it to a single effective cavity, whose the laser properties are modulated by the coupling phase. These can in particular be improved near the dark mode. The general exploration of this system finally opens the way to many other studies, based for instance on the variation of the pumping configuration and / or the coupling configuration of these cavities. In this context, other effects were observed, such as a directional emission in the waveguide, and the cancelling of this emission related to the presence of an exceptional point
Saber, Ivens. "Design et Fabrication de plateformes nanophotoniques pour le couplage fort autour de 800 nm". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS357/document.
Texto completoReaching the strong coupling between nanocavities and atomic systems is a key element for Quantum Information. During my PhD, I designed and fabricated photonic crystal nanocavities in Gallium Indium Phosphide (GaInP)for strong coupling around 800,nm, typical wavelength of atoms such as Rubidium (780,nm), Cesium (852 nm), the most used in this domain, and the Argon atoms (811 nm).The aim of my PhD thesis is to provide with a nanophotonic platform dedicated to strong coupling interaction. For this, nanocavities having optical resonances arounf 800 nm, with quality factors larger than 8.10^4 and mode volumes smaller than 0.04µm^3 are necessary.The nanocavity is a key element of nanophotonic plateform. Our platforms are composed of a photonic crystal nanocavityitself, a grating-coupler in order to collect light from a optic fiber and vice versa and feeding waveguides in order to transport the light from the grating-coupler to the cavity. An efficient nanophtonic platfom for a reaslitic implementation should have a nanocavity with a large Q-factor and small mode volume. The grating-coupler must efficiently collect the light from the optical fiber, and the feeding waveguides must transport the light without losses.I simulated, designed,fabricated and caracterized the elements of my structure. I obtained quality factors larger than 10^7 in theory, and about 2.10^4 experimentally, getting the record for the nanocavities in GaInP around the wavelength 800 nm, which make them close to realize experiments of strong coupling
Cazier, Nicolas. "Effets d’optique non-linéaire d’ordre trois dans les cavités à cristaux photoniques en silicium : auto-oscillations GHz dues aux porteurs libres et diffusion Raman stimulée". Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112337/document.
Texto completoIn this thesis, we studied third order nonlinear optical effects in photonic crystal cavities. The first of those effects is is the phenomenon of high frequency (GHz) self-pulsing in these cavities, which originates from a modulation of the transmission of the cavity due to the interaction between the free-carrier dispersion and the two-photon absorption. We have observed these self-induced oscillations for the first time in silicon photonic crystal nanocavities, with a frequency of about 3 GHz and a high spectral purity. We have developed a model to analyze the mechanisms that govern the onset of these oscillations, as well as the amplitudes of the fundamental and harmonic frequencies of these oscillations. This self-pulsing phenomenon would allow us to realize realize ultra-compact microwave sources made of silicon. The second phenomenon studied is that of Raman scattering, which is the only way to obtain lasers fully in silicon demonstrated so far. The Raman scattering was measured first in narrow photonic crystals waveguides (W0.63) of length 100 microns, where we could obtain a number of Stokes photons up to 9, showing that the stimulated Raman scattering predominated in these waveguides, although we have not been able to obtain a true Raman laser effect in them. We then measured the Raman scattering in doubly resonant nanocavities specifically designed from these waveguides to optimize the Raman effect, with quality factors up to 235000 for the Stokes resonance. Although we could only measure spontaneous Raman scattering in these cavities, with a Purcell factor of 2.9, the theoretical study that we conducted on the Raman lasers, which agrees perfectly with the experimental results, shows that it would be possible to obtain a Raman laser in these cavities with a threshold below the milliwatt, provided we reduce the losses due to the free-carrier absorption. This could be accomplished by decreasing the free-carrier lifetime, for example by removing the free carriers from the silicon using a MSM junction
Cazier, Nicolas. "Effets d'optique non-linéaire d'ordre trois dans les cavités à cristaux photoniques en silicium : auto-oscillations GHz dues aux porteurs libres et diffusion Raman stimulée". Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00924642.
Texto completo