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.
Photonic crystals (PhCs) fabricated in the bulk of dielectric media have already been demonstrated to show a low-pass spatial (angular) filter functionality. [1] These PhC filters are fabricated in inorganic glasses through a femtosecond laser writing process. The most promising aspect of such filters is their direct integration into the cavities of laser micro-resonators. In particular, the integration...
Direct laser writing in photosensitive materials is an emerging technique, allowing fabrication of arbitrary shape high-resolution 3D microstructures. Commonly, the femtosecond laser sources are used for initiating the photopolymerization reactions. Due to limited availability, only certain wavelengths are used for this technology, particularly ∼515, ∼800, and ∼1030 nm. Although the achievable results...
Microchip lasers are very efficient, compact and convenient sources of coherent light. However they have a serious disadvantage that, especially in high power operation regimes, the emitted beam structure is relatively bad (with large angular divergence). We show that the intracavity photonic crystals with spatial filtering functionality, can strongly improve the spatial characteristics of the microchip...
We propose and show experimentally uniform axisymmetric spatial filtering of light beams by three-dimensional axisymmetric photonic microstructures. Such gapless structures (similar to photonic crystals) were recorded in bulk of glass. Angular filtering of 25 mrad is demonstrated experimentally.
We present our investigations on the fabrication of three-dimensional nanostructures by direct laser writing using organic-inorganic hybrid materials that (i) can be structured accurately to sub-100nm, (ii) contain quantum dots, and (iii) can be selectively covered with metal.
Micro/nanofabrication based on femtosecond laser induced multiphoton polymerization is attracting a lot of attention as it enables to fabricate three-dimensional (3D) structures such as photonic crystals, plasmonic and metamaterial components, voids or channels, and many other components with complex geometry. By moving the laser focal point, 3D micro/nanostructures can be directly written in the...
In this report we present experimental results on biocompatibility based on stem cell growth experiments in vitro as well as reaction of living organism to polymer implants in vivo of femtosecond laser 3D micro/nanostructurable photopolymers. A synergetic study on materials for rapid 3D scaffold fabrication having micrometer features and being centimeter in size, their biocompatibility in vitro and...
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.