ABSTRACT
Today, coherent imaging techniques provide the highest resolution in the extreme ultraviolet (XUV) and X-ray regions. Fourier transform holography (FTH) is particularly unique, providing robust and straightforward image reconstruction at the same time. Here, we combine two important advances: First, our experiment is based on a table-top light source which is compact, scalable and highly accessible. Second, we demonstrate the highest resolution ever achieved with FTH at any light source (34 nm) by utilizing a high photon flux source and cutting-edge nanofabrication technology. The performance, versatility and reliability of our approach allows imaging of complex wavelength-scale structures, including wave guiding effects within these structures, and resolving embedded nanoscale features, which are invisible for electron microscopes. Our work represents an important step towards real-world applications and a broad use of XUV imaging in many areas of science and technology. Even nanoscale studies of ultra-fast dynamics are within reach.
ABSTRACT
We report on the realization and characterization of highly efficient waveguide bends in photonic crystals made of materials with a low in-plane index contrast. By applying an appropriate bend design photonic crystal bends with a transmission of app. 75 % per bend were fabricated.
ABSTRACT
Inlays made of glass ceramics Bioverit II were proved just after inserting with a composite, and after 6 month's and one year. No marginal clefts were observed at clinical controls. The scanning study demonstrated excellent compound enamel-composite-glass ceramics just after inserting. A 15 to 20 microns deep furrow within the composite at most of the proved teeth was recognized one year later. The margins of enamel and inlays were yet covered with composite.
