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.
Amplified femtosecond laser pulses are coupled through a hollow-core photonic band-gap fiber with efficiencies greater than 98%. Peak power intensities greater than 1014 W/cm2 are achieved inside the fiber core.
We report on the optical properties of a metal-organic photonic bandgap structure showing a peak transmission ~44% and that enhances the nonlinear optical properties of bulk Copper by up to an order of magnitude.
Zero-nmacr bandgap has been observed in photonic superlattices consisting of layered stack of materials with positive index of refraction and photonic crystal slab. An experimental verification of FDTD simulations is reported here.
A DWDM tunable electro-optic filter using photonic bandgaps was designed. The tuning range and minimum channel spacing was controlled by an electro-optic defect, Pb (Mg1/3Nb1/3)O3-PbTiO3, or by including the EO material within the reflecting stacks.
We demonstrate nonlinear compression of 2.5 ps and 1.2 ps laser pulses at 800 nm wavelength using a 35 m tapered hollow-core photonic bandgap fiber with continuously-decreasing dispersion.
We generate a highly-controlled, optically-dense, and repeatable Rb vapor inside of a hollow-core photonic bandgap fiber using light-induced atomic desorption. Here we present its generation dynamics and use for nonlinear quantum optical applications.
The band structure of two-dimensional photonic crystals consisting of metallic cylinders is investigated both experimentally and by numerical simulations. The crystals show large photonic band gaps in the terahertz spectral range.
We report on strong nonlinear effects in a specific sub-micron scale silica-node within the cladding of a hollow-core photonic crystal fiber at frequencies lying within the air-guiding cladding photonic bandgap.
We examine the properties of a new type of hollow-core fiber with a rib-waveguide geometry. Based on photonic band-gap fibers, these new designs offer intriguing possibilities for gas and liquid sensing.
We experimentally investigate the excitation of radially and azimuthally polarized modes in a hollow-core photonic bandgap fiber. With radially-polarized ultrashort pulses, we achieve 91% total transmission through the fiber, including coupling losses.
We report on fabricated all-solid fibers which guide by a combination of bandgap and TIR mechanisms. The fibers show high birefringence and possess a dispersion characteristic similar to the pure bandgap guiding form.
We report the lasing behaviors of a GaN defect photonic crystal membrane structure. The high Q factor and low threshold condition show the effective photon confinement with the full photonic band gap structure.
Cavity ring-down spectroscopy is demonstrated in a spliced photonic bandgap fiber cell with fs-laser-machined side micro-channels. The increase in ring-down time observed when the cell is filled with acetylene provides quantitative information on gas concentration.
We present the first characterization of cladding modes of a low-index contrast all-solid photonic bandgap fiber using an acousto-optic long-period grating. Near field modal measurements and theoretical calculations reveal unique cladding mode properties.
Eigenvector analysis on 2D surface plasmon photonic bandgap images is used for refractive index estimation. High precision (rms error of 3.8 times 10-8RIU) and large dynamic range (n = 1.305 to 1.375) are achieved with noisy data.
We study the evolution of defect states from the band-edges of a 2D photonic crystal. A simple exponential relation is derived for the dispersion of the state, and we investigate the connection with Bloch modes.
Control of femtosecond laser pulses by deterministically aperiodic photonic multilayer structures is studied both experimentally and theoretically. We demonstrate that quasiperiodic structure with only 2.8 mum thickness varies duration of phase-modulated pulses up to 30%.
Self-phase modulation was observed in GaAs/AlGaAs superlattice-core waveguides that were quantum well intermixed by ion implantation. The band gap was blue-shifted by 68 nm and the Kerr effect was suppressed by 67% after intermixing.
We report that small chiral asymmetry of the unit cell of planar metamaterials leads to strong resonant asymmetric transmission for circularly polarized light due to excitation of enantiomerically sensitive trapped modes.
We infiltrate photonic crystal fibers with negative dielectric liquid crystals. 400 nm bandgap shift is obtained in the range 22degC-80degC and 119 nm shift of the long-wavelength bandgap edge is achieved by applying a voltage of 200Vrms.
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.