The study of total light absorption due to excitation of localized surface plasmons on deep metallic crossed gratings having a sinusoidal profile with a two-dimensional periodicity shows a very strong increase in the electric field intensity, reaching 800 times the incident intensity. The region with high intensity is strongly localized at the groove top and is characterized by a volume much sm...

A method to design lasers that emit an arbitrary beam profile is studied. In these lasers, output-coupling is performed by a diffraction grating that imposes a phase and amplitude distribution onto the diffracted light. A solid-state laser emitting beams with a two-dimensional Airy intensity profile is demonstrated both theoretically and experimentally. In this case, the diffraction grating add...

In this paper, a technique to estimate the deformation profile of a Sampled Fiber Bragg Grating (SFBG) is proposed and experimentally verified. From the SFBG intensity reflection spectrum, any arbitrary longitudinal axis deformation profile applied to a SFBG is estimated. The synthesis algorithm combines a custom defined error metric to compare the measured and the synthetic spectra and the Par...

We study the effect of baryonic matter and apparent dark on black hole shadow in Verlinde's Emergent Gravity. To do so, we consider different mass profiles an optically-thin disk region described by a gas radial free fall around hole. Assuming that most galaxy is located near galactic center surrounding supermassive hole, use two models power law profile for to corresponding intensity. find siz...

The purpose of this review is to discuss particular shielding problems related to highenergy machines that are not covered in NCRP report No. 49. These include calculating the dose at the end of a maze due to neutrons and capture rays, consideration of high-energy direct-shielded doors, and laminated primary shielding. The impact of special procedures such as IMRT, TBI, and SRS will also be dis...