Results 211 to 220 of about 639,028 (243)

Microfacet Models for Refraction through Rough Surfaces

Rendering Techniques, 2007
Microfacet models have proven very successful for modeling light reflection from rough surfaces. In this paper we review microfacet theory and demonstrate how it can be extended to simulate transmission through rough surfaces such as etched glass.
Bruce Walter, Steve Marschner, Hongsong Li, K. Torrance   +3 more
semanticscholar   +1 more source

Out-of-plane reflection and refraction of light by anisotropic optical antenna metasurfaces with phase discontinuities.

Nano letters (Print), 2012
Experiments on ultrathin anisotropic arrays of subwavelength optical antennas display out-of-plane refraction. A powerful three-dimensional (3D) extension of the recently demonstrated generalized laws of refraction and reflection shows that the interface
F. Aieta, P. Genevet, N. Yu, M. Kats, Z. Gaburro, F. Capasso   +5 more
semanticscholar   +1 more source

All-angle negative refraction without negative effective index

, 2002
We describe an all-angle negative refraction effect that does not employ a negative effective index of refraction and involves photonic crystals. A few simple criteria sufficient to achieve this behavior are presented.
C. Luo, Steven G. Johnson, J. Joannopoulos, J. Pendry   +3 more
semanticscholar   +1 more source

Negative Refraction Metamaterials: Fundamental Principles and Applications

, 2005
Contributors. Preface. 1. Negative-Refractive-Index Transmission-Line Metamaterials (A. Iyer & G. Eleftheriades). 2. Passive Microwave Devices and Antennas Using Negative-Refractive-Index Transmission-Line Metamaterials (G. Eleftheriades). 3.
G. Eleftheriades, K. Balmain
semanticscholar   +1 more source

Dispersion of bound electron nonlinear refraction in solids

, 1991
A two-hand model is used to calculate the scaling and spectrum of the nondegenerate nonlinear absorption. From this, the bound electronic nonlinear refractive index n/sub 2/ is obtained using a Kramers-Kronig transformation.
M. Sheik-Bahae, D. Hutchings, D. Hagan, E. W. Stryland   +3 more
semanticscholar   +1 more source

Negative refraction in graphene-based hyperbolic metamaterials

, 2013
Here, we numerically investigate the existence of negative group refraction in graphene-based hyperbolic metamaterials (HMM) at THz frequencies. The hyperbolic dispersion of the graphene-based HMM can be tuned by varying the chemical potential and ...
K. V. Sreekanth, A. Luca, G. Strangi
semanticscholar   +1 more source

Experimental verification and simulation of negative index of refraction using Snell's law.

Physical Review Letters, 2003
We report the results of a Snell's law experiment on a negative index of refraction material in free space from 12.6 to 13.2 GHz. Numerical simulations using Maxwell's equations solvers show good agreement with the experimental results, confirming the ...
C. Parazzoli, R. Greegor, Kin Li, B. Koltenbah, M. Tanielian   +4 more
semanticscholar   +1 more source

Faster, Better: Shear-Wave Velocity to 100 Meters Depth From Refraction Microtremor Arrays

, 2001
Current techniques of estimating shallow shear velocities for assessment of earthquake site response are too costly for use at most construction sites.
J. Louie
semanticscholar   +1 more source

Experimental Verification of a Negative Index of Refraction

Science, 2001
R. Shelby, David R. Smith, S. Schultz
semanticscholar   +1 more source

A Chiral Route to Negative Refraction

Science, 2004
J. Pendry
semanticscholar   +1 more source