Differential geometry approach to asymmetric transmission of light
Asenjo
F
A
author
Erices
C
author
Gomberoff
A
author
Hojman
S
A
author
Montecinos
A
author
2017
English
In the last ten years, the technology of differential geometry, ubiquitous in gravitational physics, has found its place in the field of optics. It has been successfully used in the design of optical metamaterials through a technique now known as "transformation optics." This method, however, only applies for the particular class of metamaterials known as impedance matched, that is, materials whose electric permittivity is equal to their magnetic permeability. In that case, the material may be described by a spacetime metric. In the present work we will introduce a generalization of the geometric methods of transformation optics to situations in which the material is not impedance matched. In such situations, the material -or more precisely, its constitutive tensor-will not be described by a metric only. We bring in a second tensor, with the local symmetries of the Weyl tensor, the "W-tensor." In the geometric optics approximation we show how the properties of the W-tensor are related to the asymmetric transmission of the material. We apply this feature to the design of a particularly interesting set of asymmetric materials. These materials are birefringent when light rays approach the material in a given direction, but behave just like vacuum when the rays have the opposite direction with the appropriate polarization (or, in some cases, independently of the polarization). (C) 2017 Optical Society of America
WOS:000413995000004
exported from refbase (show.php?record=798), last updated on Sun, 25 Mar 2018 13:53:37 -0300
text
files/798_Asenjo_etal2017.pdf
10.1364/OE.25.026405
Asenjo_etal2017
Optics Express
Opt. Express
2017
Optical Soc Amer
continuing
periodical
academic journal
25
22
26405
26416
1094-4087