L'invention concerne un interferometre a reseau lamellaire, dans lequel les faisceaux lumineux sont collimates et focalises sur le reseau au moyen d'un miroir (9), qui en meme temps sert a collecter la lumiere reflechie par le reseau. Dans ce cas, le faisceau lumineux d'une source de lumiere blanche (1) est tout d'abord collimate au moyen d'une premiere lentille (2) et passe ensuite a travers une cuvette a echantillons (3). Le faisceau lumineux transmis est ulterieurement focalise et couple par une autre lentille (2) dans une fibre (17). La lumiere vers ladite fibre (17) est ulterieurement dirigee vers un miroir (9), reflechie a partir dudit miroir (9) sur un reseau (11), qui fait partie d'un interferometre a reseau lamellaire qui est obtenu au moyen d'un microsysteme electromecanique MEMS (7), qui est monte sur un porte-MEMS (6), tout comme la fibre (17). La lumiere reflechie par ledit reseau (11) est reflechie sur le meme miroir (9), ainsi que focalisee et couplee par ledit miroir (9) dans une seconde fibre multimode (18), qui est egalement fixee au porte-MEMS (6). La lumiere guidee par ladite seconde fibre multimode (18) est ulterieurement acheminee dans un dispositif de detection (4).

We report the fabrication of widely tuneable (627–702nm) optically pumped two-dimensional distributed feedback polymer lasers that utilize a red-emission fluorene copolymer as the active gain medium. The lasers exhibit efficient, low threshold operation and emit highly directional output beams as a result of the enhanced two-dimensional photonic confinement provided by the employed resonator. Their emission and operating characteristics are described in detail. We demonstrate that the very wide spectral range (Δλ⩾75nm) over which these lasers can be systematically tuned is in very good agreement with theoretical predictions based on a simple waveguide model. In addition, we show that the lasers have long operating lifetimes τ1∕2⩾2×107 pulses and we discuss the impact that degradation has on the laser output characteristics.

We present dynamically reconfigurable photonic crystal nanobeam cavities, operating at ~1550 nm, that can be continuously and reversibly tuned over a 9.5 nm wavelength range. The devices are formed by two coupled nanobeam cavities, and the tuning is achieved by varying the lateral gap between the nanobeams. An electrostatic force, obtained by applying bias voltages directly to the nanobeams, is used to control the spacing between the nanobeams, which in turn results in tuning of the cavity resonance. The observed tuning trends were confirmed through simulations that modeled the electrostatic actuation as well as the optical resonances in our reconfigurable geometries. High quality factor photonic crystal nanobeam cavities, " Appl. " Quantum nature of a strongly coupled single quantum dot-cavity system, Digital resonance tuning of high-Q/Vm silicon photonic crystal nanocavities by atomic layer deposition, " Appl. tuning of photonic crystal cavities using chalcogenide glasses, " Appl. Aligning microcavity resonances in silicon photonic-crystal slabs using laser-pumped thermal tuning, " Appl. Optically tunable microcavity in a planar photonic crystal silicon waveguide buried in oxide, " Opt. Emission spectrum of electromagnetic energy stored in a dynamically perturbed optical microcavity, " Opt. Scanning a photonic crystal slab nanocavity by condensation of xenon, " Appl.crystal electric tuning of a photonic crystal laser, " Appl. Design of a silicon nitride photonic crystal nanocavity with a Quality factor of one million for coupling to a diamond nanocrystal, " Opt. Rue, " Ultra high quality factor one dimensional photonic crystal/photonic wire micro-cavities in silicon-on-insulator (SOI), " Opt. A picogram-and nanometre-scale photonic-crystal optomechanical cavity, Coupling-induced resonance frequency shifts in coupled dielectric multi-cavity filters, " Opt. Tunable coupling regimes of silicon microdisk resonators using MEMS actuators, " Opt. Resonant scattering and second-harmonic spectroscopy of planar photonic crystal microcavities, " Appl. Polarization control and sensing with two-dimensional coupled photonic crystal microcavity arrays, " Opt. Light scattering and fano resonances in high-q photonic crystal nanocavities, " Appl.