Dry sodium chloride forms cubic crystals, while marine aerosol particles often display more or less irregular deviations from this ideal form. In study, three non-ideal cuboidal and octahedral model geometries are investigated. Superellipsoids tested as a to simulate the linear backscatter depolarization ratio extinction-to-backscatter ratio. Gaussian random cubes well convex polyhedra investig...

Abstract We demonstrate a photonic analog of twisted bilayer graphene that has ultra-flat bands and exhibits extreme slow-light behavior. Our device, which an operating wavelength in the C-band telecom window, uses two crystalline silicon crystal slabs separated by methyl methacrylate tunneling layer. numerically determine magic angle using finite-element method corresponding band structure, fl...

Multiple independent communications are studied on optical bus parallel computing models. These models make use of an optical bus interconnect to provide for communication in a multi-processor system. The communication traffic studied in this paper results in potential frequent bus collisions. The well known collision detect mechanism is ineffective however due to the communication pipelining a...

Today the vast majority of telecommunication and Internet messages are sent along fiber optic cables buried underground. Binary data (encoded as a sequence of pulses of light) may travel thousands of kilometers to reach its final destination. The fibers that are used for this data transfer necessarily contain manufacturing impurities that lead to fast and slow polarization states for the propag...

Optical blur due to lens aberrations and defocus has been demonstrated in some cases to be spatially varying across the image plane. However, existing models in the literature for the point-spread function (PSF) corresponding to this blur are either parameterized and spatially invariant or spatially varying but ad-hoc and discretely defined. A parameterized model is developed and presented for ...

The best-sampled afterglow light curves are available for GRB 030329. A distinguishing feature of this event is the obvious rebrightening at around 1.6 days after the burst. Proposed explanations for the rebrightening mainly include the two-component jet model and the refreshed shock model, although a sudden density-jump in the circumburst environment is also a potential choice. Here we reexami...