Abstract We design and fabricate ultra-broadband achromatic metalenses operating from the visible into short-wave infrared, 450–1700 nm, with diffraction-limited performance. A hybrid 3D architecture, which combines nanoholes a phase plate, allows realization in low refractive index materials. As result, two-photon lithography can be used for prototyping while molding mass production. Experimen...

We observed two transits of the iconic gas giant HD 209458b between 380 and 780 nm, using high-resolution ESPRESSO spectrograph. The derived planetary transmission spectrum exhibits features at all wavelengths where parent star shows strong absorption lines, for example, Na I , Mg Fe II Ca V H ? K . interpreted these as signature deformation stellar line profiles due to Rossiter-McLaughlin effe...

Mullite–SiC nanocomposites are synthesized by introducing surface modified sol–gel mullite coated SiC particles in the matrix and densification and associated microstructural features of such precursor are reported. Nanosize SiC (average size 180 nm) surface was first provided with a mullite precursor coating which was characterized by the X-ray analysis and TEM. An average coating thickness of...

This study was carried out to develop a hyperspectral imaging system in the near infrared (NIR) region (900-1700 nm) to evaluate the quality of cooked turkey hams. Different qualities of turkey hams were studied based on their chemical ingredients and processing parameters used during processing. Hyperspectral images were acquired for ham slices originated from each quality class and then their...

Radiocarbon analyses and stable isotope measurements are presented foro recent cores of banded corals from the Florida Straits. These values provide a record of variations in the ratio of carbon-14 to carbon-12 in the dissolved inorganic carbon in the surface waters of the Gulf Stream from A.D. 1642 to 1800. An increase in the carbon-14/carbon-12 ratio of 7 per mil for coral growth during the e...