Spatiotemporal instability in a periodic structure consisting of negative-index and positive-index materials

2017 ◽  
Vol 71 (11) ◽  
Author(s):  
Jinggui Zhang ◽  
Xiongjie Kang
Keyword(s):  
Periodic Structure ◽  
Negative Index ◽  
Spatiotemporal Instability ◽  
Positive Index

Direction-Independent Band Gaps Extension Based on Thue-Morse Photonic Heterostructures Containing Negative-Index Materials

2011 ◽  
Vol 675-677 ◽  
pp. 1077-1080 ◽  
Author(s):  
Ou Yang Hong ◽  
Xin Hua Deng
Keyword(s):  
Optical Fibers ◽  
Transverse Electric ◽  
Negative Index ◽  
Reflection Band ◽  
Negative Index Materials ◽  
One Dimensional ◽  
Fabry Perot ◽  
Potential Applications ◽  
New Type ◽  
Positive Index

The band structure and photonic spectrum of one dimensional Thue-Morse quasicrystal composed by negative-index materials and positive-index materials are studied. We show that a new type of the omnidirectional reflection band (ORB) exists in Thue-Morse photonic heterostructures. Compared to a single Thue-Morse quasicrystal, the frequency range of the ORB in a Thue-Morse photonic heterostructure can be notably enlarged, and the width and location of the ORB do not change with Thue-Morse order. The lower edge of the ORB depends only on transverse electric (TE) polarization, while the higher edge of the ORB depends only on transversemagnetic (TM) polarization. These results imply potential applications in improving planar microcavities, optical fibers, and Fabry–Perot resonators, etc.

scholarly journals Negative index effects from a homogeneous positive index prism

2017 ◽  
Vol 4 ◽  
pp. 9
Author(s):  
Sherman W. Marcus ◽  
Ariel Epstein
Keyword(s):  
Negative Index ◽  
Positive Index

Energy Transmission by Photon Tunneling in Multilayer Structures Including Negative Index Materials

2005 ◽  
Vol 127 (9) ◽  
pp. 1046-1052 ◽  
Author(s):  
C. J. Fu ◽  
Z. M. Zhang ◽  
D. B. Tanner
Keyword(s):  
Radiative Transfer ◽  
Near Field ◽  
Multilayer Structures ◽  
Negative Index ◽  
Material Loss ◽  
Surface Polaritons ◽  
Negative Index Materials ◽  
Photon Tunneling ◽  
Energy Conversion Devices ◽  
Positive Index

The phenomenon of photon tunneling, which depends on evanescent waves for radiative transfer, has important applications in microscale energy conversion devices and near-field optical microscopy. In recent years, there has been a surge of interest in the so-called negative index materials (NIMs), which have simultaneously negative electric permittivity and negative magnetic permeability. The present work investigates photon tunneling in multilayer structures consisting of positive index materials (PIMs) and NIMs. Some features, such as the enhancement of radiative transfer by the excitation of surface polaritons for both polarizations, are observed in the predicted transmittance spectra. The influence of the number of layers on the transmittance is also examined. The results suggest that the enhanced tunneling transmittance by polaritons also depends on the NIM layer thickness and that subdividing the PIM/NIM layers to enhance polariton coupling can reduce the effect of material loss on the tunneling transmittance.

scholarly journals GLOBAL WELL-POSEDNESS OF THE 1D DIRAC–KLEIN–GORDON SYSTEM IN SOBOLEV SPACES OF NEGATIVE INDEX

2009 ◽  
Vol 06 (03) ◽  
pp. 631-661 ◽  
Author(s):  
ACHENEF TESFAHUN
Keyword(s):  
Sobolev Spaces ◽  
Well Posedness ◽  
Dirac Spinor ◽  
Negative Index ◽  
Main Ingredient ◽  
Time Estimates ◽  
The Cauchy Problem ◽  
Klein Gordon ◽  
Positive Index ◽  
Well Posed

We prove that the Cauchy problem for the Dirac–Klein–Gordon system of equations in 1D is globally well-posed in a range of Sobolev spaces of negative index for the Dirac spinor and positive index for the scalar field. The main ingredient in the proof is the theory of "almost conservation law" and "I-method" introduced by Colliander, Keel, Staffilani, Takaoka, and Tao. Our proof also relies on the null structure in the system, and bilinear space–time estimates of Klainerman–Machedon type.

scholarly journals A metric property of umbilic points

2003 ◽  
Vol 75 (4) ◽  
pp. 405-413
Author(s):  
Ronaldo Garcia ◽  
Jorge Sotomayor
Keyword(s):  
Statistical Physics ◽  
Negative Index ◽  
Invariant Metric ◽  
The Asymmetry ◽  
Cubic Forms ◽  
Umbilic Points ◽  
Positive Index

In the space of cubic forms of surfaces, regarded as a G-space and endowed with a natural invariant metric, the ratio of umbilic points with a negative index to those with a positive index is evaluated in terms of the asymmetry of the metric, defined here. This work contains also a section with references pertinent to umbilic points and one with a discussion of a connection of the above defined ratio with that reported in 1977 by Berry and Hannay in the domain of Statistical Physics.

Sign in / Sign up

Export Citation Format

Share Document