We experimentally demonstrate an ultra high Q/V nanocavity on SOI substrate. The design is based modal adaptation within the cavity and allows to measure a quality factor of 58.000 for volume 0.6(lambda/n)(3) . This record value 10(5) achieved structure standing physical substrate, rather than membrane, in very good agreement with theoretical predictions also shown. Based these experimental results, we show that further refinements could lead ratios close 10(6).

We describe full multiple-scattering calculations of localized surface photonic states set up by lithographically designed nanostructures made a finite number dielectric pads deposited on planar surface. The method is based numerical solution the dyadic Dyson's equation. When are arranged to form closed circle, we find field patterns that look like electronic charge density recently observed above quantum corrals. propose two experimental techniques could be used observe these...

When a large number of similar gold particles are organized into complex architectures, the dipolar plasmon spectrum individual plasmonic entities gives rise to broader, red-shifted feature centered around 750 nm. In this work, we show that superstructures fabricated using convective assisted capillary force assembly method (CA-CFA) and excited at wavelength display subwavelength patterning their optical field intensity results from self-consistent coupling between colloidal nanoparticles....

3D control of the motion self-powered micromotors is demonstrated using AC electrokinetics by applying an electric field on indium tin oxide transparent electrodes. As a service to our authors and readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support issues arising from (other than missing files) should addressed Please note: The publisher responsible...

By analyzing the thermal motion of fluorescent dielectric microbeads trapped in near-field a silicon nanocavity, we investigate influence bead's size and trapping laser power on shape optical trap "effective" stiffness. We demonstrate that potential is proportional to subwavelength patterns electromagnetic intensity distribution for unexpectedly large Mie particle sizes. More especially, show mapping experienced by 500 nm diameter bead reveals nanopatterns cavity resonant mode. This result...

We study here the lateral evanescent coupling between photonic crystals cavities. The structure consists in two identical monomode Fabry–Perot nanocavities, integrated on silicon-on-insulator slot-waveguides (WG). Spectral and optical near field measurements were led supported quantitatively by three dimensional simulations. It appears that this system produces a bimodal response: resonances corresponding, respectively, to an even odd mode. Particularly, case exhibits localization air slot...

We report on the fabrication and photovoltaic characterization of In 0.12 Ga 0.88 N/GaN multi-quantum-well (MQW) solar cells grown by metal–organic vapor phase epitaxy (0001) sapphire substrates. Increasing number MQWs in active region from 5 to 30 improves a factor 10 peak external quantum efficiency device at price slight reduction increase shunt series resistance, respectively. Solar with exhibit an 38% 380 nm, open circuit voltage 2.0 V, short current density 0.23 mA/cm 2 fill 59% under...

We designed a very simple 2D array of chambers protected from flow and supplied by single inlet in order to easily monitor stain hematopoietic stem cells over long periods time.

Because of antibiotics misuse, the dramatic growth antibioresistance threatens public health. Tests are indeed culture-based, and require therefore one to two days. This long time-to-result implies use large-spectrum antibiotherapies as a first step, in absence pathogen characterization. Here, breakthrough approach for culture-less fast assessment bacterial response stress is proposed. It based on non-destructive on-chip optical tweezing. A laser loads an nanobeam cavity whose evanescent...

AC electrokinetics is a versatile tool for contact-less manipulation or characterization of cells and has been widely used separation based on genotype translation to electrical phenotypes. Cells responses an electric field result in complex combination electrokinetic phenomena, mainly dielectrophoresis electrohydrodynamic forces. Human behaviors remain unclear over large frequency spectrum as illustrated by the self-rotation effect observed recently. We here report analyze human different...

Dielectrophoresis is widely used for cell characterization, and the exerted force on cells depends difference of polarizability between latter surrounding medium. This physical phenomenon translated by real part Clausius-Mossotti factor. It mostly modeled from imaginary part, measured electrorotation. The method described here measures experimentally relies velocity when submitted to pure dielectrophoresis, it was conducted several human lines, at different times. A variety lines evaluated,...

AC electrokinetics is becoming a strategic tool for lab-on-a-chip systems due to its versatility and high level of integration. The ability foreseen the behaviour fluids particles under non-uniform electric fields important allow new generations devices. Though most studies predicted motion in co-planar electrodes configurations, we explore pure 3-D electrokinetic effect that can open way enhance contact-less handling throughout microchannel. By fabricating 3D microfluidic chips with...

We demonstrate here that switching and tuning of a nanocavity resonance can be achieved by approaching sub-micrometer tip inside its evanescent near-field.The energy is tuned over wide spectral range (Δλ/λ~10 -3 ) without significant deterioration the cavity peaktransmittance linewidth.Such result taking benefits from weak tip-cavity interaction regime in which behaves as pure optical path length modulator.

We experimentally show that the self-phase modulation of picosecond pump pulses, induced by both optical Kerr effect and free-carrier refraction, has a detrimental on maximum on-off Raman gain achievable in silicon insulator nanowaveguides, causing it to saturate. A simple calculation coefficient from measured broadened output spectra perfectly matches saturated behavior amplified signal observed at different input powers.

Abstract We investigate the influence of growth temperature, p ‐doping with bis‐cyclopentadienyl magnesium (Cp 2 Mg) and number N multi‐quantum wells on surface morphology, electrical optical properties InGaN‐based solar cells grown by metal‐organic vapour phase epitaxy. Atomic force microscopy measurements show no multiple‐quantum well but a smoothing increase Cp Mg flow. Electrochemical capacitance‐voltage profiling exhibits an ‐N d concentration when increasing flow from 250 to 700 sccm....

In this paper, we study the influence of fabrication uncertainties on silicon-on-insulator optical nanosystems performances. The considered structure consists in near-field coupled twin nanobeam cavities. We have performed experiments a given population samples, and noticeable changes light propagation localization were observed. Thanks to an analytic coupled-mode-based method supported by three-dimensional numerical computations, quantitatively explain these experimental observations....

Near-field optical forces arise from evanescent electromagnetic fields and can be advantageously used for on-chip trapping. In this work, we investigate how at the surface of photonic cavities efficiently trap micro-objects such as polystyrene particles bacteria. We study first influence trapped particle's size on trapping potential introduce an original optofluidic near-field microscopy technique. Then analyze rotational motion clusters microparticles their possible use microfluidic...

Three-dimensional control over the motion of self-powered Janus micromotors is demonstrated by T. Honegger and co-workers using AC electrokinetics, applying electric fields on transparent indium-tin-oxide electrodes. On page 5630, they show how micromotor direction can be regulated for single or collective motion, applicable to in vitro cell manipulation drug delivery chemically modifying without complicated equipment.

This work uses convective assisted capillary force assembly from a collection of 100 nm fluorescent polystyrene nanoparticles to fabricate 4 μm wide and 1 high localized light-emitting superstructures. Large scale superstructures about 10 000 particles are transferred on free silicon surfaces by microcontact printing. Optical characterization reveals that these sources emit polychromatic visible light 400 800 equivalent white spectrum. Finally, single objects studied characterize the spatial...