Based on the polarization-sensitive absorption of graphene under conditions of total internal reflection, a novel optical sensor combining graphene and a microfluidic structure was constructed to achieve the sensitive real-time monitoring of refractive indexes. The atomic thickness and strong broadband absorption of graphene cause it to exhibit very different reflectivity for transverse electri...

A review is given of the optical properties of isotropic chiral media, based on the symmetrized constitutive relations of Condon. The review includes discussion of wave propagation in chiral media, and derivation of the reflection and transmission amplitudes of an isotropic optically active medium, and of a layer resting on a substrate. Boundary conditions and energy conservation relations are ...

Abstract: This paper describes a method for 3-D surface estimation based on reflection measurements in different orientations of the light source and the paper. To facilitate the estimation, surface facets that probably support specular reflection were marked and isolated, so as to enable the application of simple Lambertian reflectance model over those non-specular reflection points. A compute...

The absorption and reflection of electromagnetic waves by various particles in the earth’s atmosphere allow passage only certain wavelengths to reach ground, called Earth’s transparent window. In this study, perfect was theoretically obtained range near- mid-infrared atmospheric transparency window using a simple absorber with metal-dielectric-metal structure. numerical simulations showed avera...

Angle-resolved reflection inelastic electron scattering has been used to measure the dispersion of the surface plasmon for thick films of Na and K. The measured dispersion is negative at small momentum parallel to the surface as predicted by quantum-mechanical calculations of the dynamic response of the electrons at the surface of an interacting electron gas. A simple physical picture is presen...

We define a concept of “regularity” for finite unitary reflection groups, and show that an irreducible finite unitary reflection group of rank greater than 1 is regular if and only if it is a Coxeter group. Hence we get a characterization of Coxeter groups among all the irreducible finite reflection groups of rank greater than one. The irreducible finite unitary reflection groups were classifie...

We study complex Coxeter diagrams of some unitary reflection groups. Using solely the combinatorics of diagrams, we give a new proof of the classification of root lattices defined over E = Z[e2πi/3]: there are only four such lattices, namely, the E–lattices whose real forms are A2, D4, E6 and E8. Next, we address the issue of characterizing the diagrams for unitary reflection groups, a question...

Ocean bottom reflectivity has been studied for a simple layered sedimentary model at shallow depth. Reflections from the bottom were determined from standard geophysical reflection data. The plane wave reflections have been obtained as bottom loss (-20log|R|) from the available reflection seismic data. Bottom loss estimated in the 10-250 Hz band are presented as functions of frequency and of an...

The planetary albedo is partitioned into a component due to atmospheric reflection and a component due to surface reflection by using shortwave fluxes at the surface and top of the atmosphere in conjunction with a simple radiation model. The vast majority of the observed global average planetary albedo (88%) is due to atmospheric reflection. Surface reflection makes a relatively small contribut...

Three-dimensional molecular dynamics simulations of hyperthermal copper atom impacts with copper surfaces have been used to investigate the effects of incident atom energy upon atomic reflection and resputtering during physical vapor deposition. No reflection or resputtering has been observed for incident energies below 10 eV. However, as the incident energy was increased to 20 eV and above, th...