The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Hybrid plasmonics can provide a technology solution for lab-on-a-chip applications with nano-scale waveguiding and subwavelength light confinement, keeping the propagation loss on an acceptable level. In this talk we will present some designed and fabricated devices in application to bio-sensing, based on single-slot and double-slot hybrid plasmonic resonant structures on silicon platform that can...
Racetrack micro-resonator (MR), made from partially or totally oxidized porous silicon (PS) ridge waveguides fabricated with standard photolithography process, is reported. The design and the technological process are described including a study of waveguide dimensions that provide single mode propagation. Scanning electronic microscopy observations and optical characterizations clearly show that...
In this paper, we report our recent results about slotted photonic structures for hybrid on-chip integration in silicon photonics. Explored schemes cover hollow core waveguide optimized micro-ring resonators, slot photonic crystal cavities, and slow light slotted waveguides, all aiming at the enhancement of light-matter interactions. A comparison between several of these approaches is drawn regarding...
We report on the design, fabrication and characterization of all-photonic-crystal, electrically-pumped, second-order DFB lasers arrays emitting around 2.4 µm. Lasers were fabricated using GaSb-based materials and optimized 2D photonic crystal waveguides geometry. Threshold in the range of 100–150 mA depending on the PhC period are measured. CW emission with high SMSRs of 35 dB are achieved. Such laser...
Mode-locked integrated mid-IR waveguide chip lasers with ultra-short pulse duration and high peak power are of great interest for a large range of applications like trace-gas spectroscopy and early-cancer detection. As those lasers are automatically embedded within a small block of doped glass, they are inherently robust and immune to environmental fluctuations. In this paper we investigate the suitability...
Recent advances in the theoretical and experimental studies of Ge/SiGe quantum wells structures will be presented with a focus on optical telecommunication applications. Firstly, high-speed stand-alone Ge/SiGe QW electro-absorption modulators and photodetectors will be reported. It will be followed by the presentation of different methods for engineering Ge/SiGe QW to tune the operating wavelength...
Near-field coupling to nanophotonic waveguides enables absorption engineering of superconducting nanowires for efficient single photon detection on chip. The direct compatibility with photonic circuitry allows for using such devices in the framework of integrated optics and thus for exploiting the rich toolbox of nanophotonics for device characterization and optimization. We integrate superconducting...
In this article, light localization inside woodpile photonic crystal made of stacks of parallel dielectric rods is numerically and experimentally investigated. The light localization phenomena is achieved by tailoring the structural parameters in the way that a propagating beam is gradually slowed down and finally stopped at a wavelength-dependent position along the structure. In contrast to previous...
Semiconductor organometallic halide perovskites (CH3NH3PbX3, X=Cl, Br, I) (HPVK) have emerged as a new promising material able to improve the optoelectronic technology performance. Although this material has mostly been applied to improve the efficiency of photovoltaic devices, it also shows amazing properties for photonic applications. In particular, HPVK exhibits high photoluminescence (PL) quantum...
The emerging application of organic materials to the integrated photonics led to the definition of the Silicon Organic Hybrid (SOH) technology, that is a promising approach to bring active functionalities on an intrinsically passive silicon substrate. Erbium-doped molecular materials were demonstrated to provide IR emission in the C band when grown on silicon as solution processed thin films, enabling...
We experimentally demonstrate topologically protected optical waveguiding in silicon at the interface between two topologically distinct dimer chains. Further, we propose and demonstrate beating between topological and trivial defect modes.
This paper presents a novel design of a “Sensor on a Chip” spectrometer, based on silicon on silica (SOI) material. It employs a series of silicon micro-ring resonators with varied diameters whose resonance wavelengths evenly space out across the CO2 emission spectrum range. This provides a resonators-based detection platform for the observation of the Earth's atmospheric CO2 levels, as well as for...
The next generation of optical networks requires the development of optical technology that supports high bandwidth, such as the coherent systems. The coherent detection allows the in-phase and quadrature components of a QPSK signal to be extracted as a result of the interference with a local oscillator. An integrated optics flexible 90° hybrid coupler device based on a single organic-inorganic di-ureasil...
Third-order nonlinear optical phenomena have been intensively studied in integrated structures of crystalline silicon, Hydex, and silicon nitride for different applications, from classical to quantum photonics. As any other material, also porous silicon PSi is characterized by a third-order nonlinear response. Previous works have focused mainly on third-harmonic generation or two-photon absorption...
Progress on the development of a long wavelength (∼2 µm) generic monolithic photonic integration technology on indium phosphide substrate and a novel concept of a tunable laser realized as a photonic integrated circuit using such technology are presented. Insights into the development of active and passive waveguide structures which are used to define a limited set of on-chip functionalities in the...
In this paper, we present the numerical conception of a surface plasmon-based nanotweezers obtained by coupling a short nanoparticle chain to a traditional SOI waveguide. In particular, we detail on simplified calculation scheme, based on the estimation of the gradient force, able to ease the analysis when the refractive index of the tweezed particles is similar to that of the background. Results...
The insertion of mobile ions and coupled changes of electron concentration are exploited to induce a non-volatile and reversible change of the optical properties of mixed ionic and electronic conductors (MIECs). The physical mechanisms responsible for the change of the real and imaginary part of the MIECs' refractive index upon ion-intercalation are extensively investigated in the visible and near-IR...
A rigorous mathematical method to simulate an ultra-high Q-factor 1D PhC ring resonator (1D PhCRR) is proposed. The integration of a 1D PhC in a ring cavity resonator allows an enhancement of the Q-factor of a single ring resonator up to 109 or more, without enlarging the device footprint, with an improvement of at least two orders of magnitude in comparison with the values obtained without the grating...
We address the potential of a system with gain and loss featuring a PT-symmetric configuration for the realization of tunable, reconfigurable and non-reciprocal devices. By using PT-symmetric coupled waveguides and Bragg reflectors as fundamental building blocks, it is possible to build a wide variety of functional optical devices such as switches, unidirectional Bragg gratings, reconfigurable modal...
A broad range of physical experiments and industrial applications have been proposed by employing optical microresonators. In this context, modelling, which is the main way of informing design decisions, is of paramount importance and still presents challenges when dealing with multiphysics stiff systems. Along this line, this paper presents a reliable numerical model for the scalable reduction of...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.