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.
Image (Fluoroscopy) guided interventions require prolonged localized fluoroscopy, multiple radiographic exposures, and repeated procedures with relatively high patient and personnel exposure. MEDRAPET (MEDical RAdiation Protection Education and Training) consortium of 6 European Professional Societies including CIRSE conducted an EU-wide study to evaluate the current status of Radiation Protection...
We will review our works on plasmon lasers and circuits. The scaling down of laser will experience ever-increasing radiation loss and stronger divergence. Plasmonics has emerged as one solution for these hurdles.
We report plasmon lasers with strong cavity feedback and optical confinement to 1/20th wavelength. Strong feedback arises from total internal reflection of plasmons, while confinement enhances the spontaneous emission rate by up to 20 times.
We review recent progress on metal-based lasers with optical confinement approaching 1/20th of the wavelength at room temperature and discusses the broader impact of plasmonic light sources and their application.
We report plasmonic Fabry-Perot nano-cavities formed by high aspect ratio metal mirrors on a metal surface. Quality factors from 100-200 were obtained, limited by plasmonic losses and fin scattering at short and long wavelengths respectively.
We report the first bulk metamaterials at visible frequencies that shows intriguing negative refraction for all incident angles. The metamaterial is realized by growing silver nanowire in a porous alumina template.
We experimentally demonstrate cloaking at optical frequencies. A dielectric carpet cloak is designed to hide object under a curved reflecting surface by mimicking the reflection from a flat surface, enabling broadband invisibility with low loss.
We present the formulation of wave propagation in arrays of subwavelength waveguides with sharp index contrasts. We demonstrate the collapse of the bands into evanescent modes, and propagation of lattice solitons with superluminal phase velocity.
We present linear and nonlinear deep sub-wavelength confinement in metal-dielectric periodic nano-structures. The strong anisotropy supports the propagation of modes with very large transverse momentum, enabling confinement size limited only by the structure periodicity.
We present the formulation of wave propagation in arrays of subwavelength waveguides with sharp index contrasts. We demonstrate the collapse of the bands into evanescent modes, and propagation of lattice solitons with superluminal phase velocity.
We predict and present the first observation of conical diffraction arising from k-space singularities in the band-structure of a periodic potential. The experiments are carried out in honeycomb lattices, where we also generate ??honeycomb gap-solitons??.
Purpose To report our experience with the Angioseal vascular closure device for hemostasis of distal brachial artery puncture. Methods Between September 2003 and August 2005, 64 Angioseal vascular closure devices were inserted in 64 patients (40 men, 24 women; mean age 65 years) immediately after diagnostic or therapeutic arterial angiographies performed through a 5 Fr to 7 Fr sheath via the distal...
We present a new approach for the study of light propagation in 2-dimensional disordered lattices. We demonstrate experimentally diffusion-like transport and show by numerical study that our method can provide direct observation of Anderson Localization.
We present the first experimental observation of spatial four-wave-mixing in photonic lattices, demonstrating universal aspects associated such processes in periodic media, such as Bloch-wave folding, engineered phase-matching, and ldquoband-controlrdquo of the interaction products.
We present the first observation of defect dynamics in 2D nonlinearly interacting photonic quasicrystals. In addition, we present experiments showing linear ldquodiscreterdquo diffraction from various lattice sites and lattice solitons in photonic quasicrystals.
We report the first experimental observation of gap random-phase lattice solitons. We observe their self-trapping conformed to the lattice periodicity in real space, as well as their multi-humped power spectrum in k-space.
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.