Graded index and randomly oriented core-shell silicon nanowires with broadband and wide angle antireflection

Antireflection with broadband and wide angle properties is important for a wide range of applications on photovoltaic cells and display. The SiOx shell layer provides a natural antireflection from air to the Si core absorption layer. In this work, we have demonstrated the random core-shell silicon nanowires with both broadband (from 400nm to 900nm) and wide angle (from normal incidence to 60o) antireflection characteristics within AM1.5 solar spectrum. The graded index structure from the randomly oriented core-shell (Air/SiOx/Si) nanowires may provide a potential avenue to realize a broadband and wide angle antireflection laye

Higher-order optical resonance node detection of integrated disk microresonator

We have demonstrated higher-order optical resonance node detection by using an integrated disk microresonator from through port of the coupling bus waveguide. In addition to the fundamental mode, the disk resonator has higher-order whispering gallery modes. The excited second-order higher-order mode has a node at the position where the electromagnetic energy of the fundamental mode is close to a maximum. This high resolution measurement of optical resonance mode profile has a variety of applications for optical sensing and detection. The self-referencing characteristics of the two optical resonance modes have potential to achieve optical detection independent of external perturbation, such as temperature change

Il rating tra impresa banca e territorio. Modina M., Formisano V. ( a cura di)

Il lavoro analizza i contenuti tecnici dei sistemi di rating delle banche italiane, gli utilizzi gestionali del rating e lo stato dell'arte del processo di credit risk management delle stesse, Il lavoro trae origine dai risultati di un questionario somministrato ad un campione rappresentativo di banche italiane.This paper analyzes the technical features of the Italian bank's rating systems, the rating uses and the state of the of the credit risk management process. The arguments in the present work are the result of the data collected with a questionnaire addressed to a representative sample of Italian banks

Il rating nel processo di Credit Risk Management

Il lavoro affronta la tematica dei sistemi di rating interno adottati dalle banche italiane. Le ottiche di analisi sono molteplici: le fasi per la costruzione del rating,gli impatti sulle banche di natura gestionale, procedurale e organizzativa. La metodologia seguita è duplice: lo stato dell’arte dei sistemi di rating viene ricostruito tramite una survey condotta con questionari e la disclosure sul rischio di credito rilasciata dalle banche