scholarly journals Two-dimensional Left-handed Metamaterial with a Negative Refractive Index

2006 ◽  
Vol 36 ◽  
pp. 6-11 ◽  
Author(s):  
Koray Aydin ◽  
Kaan Guven ◽  
Ekmel Ozbay
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
Two Dimensional ◽  
Left Handed

Left-Handed Material in Five-Level System Based on the Effect of Spontaneously Generated Coherence

2013 ◽  
Vol 816-817 ◽  
pp. 242-245
Author(s):  
Xiang An Yan ◽  
Li Qiang Wang
Keyword(s):  
Refractive Index ◽  
Density Matrix ◽  
Quantum Coherence ◽  
Atomic System ◽  
Negative Refractive Index ◽  
Matrix Approach ◽  
Level System ◽  
Spontaneously Generated Coherence ◽  
Left Handedness ◽  
Left Handed

We propose a scheme for realizing negative refractive index in a multilevel atomic system. The theoretical modeling has been done using density matrix approach in which the spontaneously generated coherence (SGC) is also induced. It is shown that the negative refractive index can be obtained on the effect of quantum coherence. The parameters () quantifying left-handedness in the system become more negative if the SGC is defined in the appropriate value. Furthermore, left-handed material with reduced absorption is possible by choosing appropriate parameters.

scholarly journals A simplified analytical approach to calculation of the electromagnetic behavior of left-handed metamaterials with a graded refractive index profile

2007 ◽  
Vol 39 (2) ◽  
pp. 185-191 ◽  
Author(s):  
N. Dalarsson ◽  
M. Maksimovic ◽  
Z. Jaksic
Keyword(s):  
Refractive Index ◽  
Numerical Solutions ◽  
Negative Refractive Index ◽  
Refractive Index Profile ◽  
Electromagnetic Response ◽  
Reflection And Transmission ◽  
New Class ◽  
Left Handed ◽  
Analytical Expressions ◽  
Positive Index

We investigated the spectral properties of a new class of nanostructured artificial composite materials with tailored electromagnetic response, i.e. negative refractive index materials, also known as "left-handed" metamaterials. We analyzed structures incorporating both ordinary positive index media and negative refractive index metamaterials where the interface may be graded to an arbitrary degree. Utilizing a modified version of the Rosen-Morse function, we derived analytical expressions for the field intensity and spectral reflection and transmission through a graded interface between positive and negative index materials. We compared our results to numerical solutions obtained using the transfer matrix technique. .

RESERVOIR EFFECT ON A FOUR-LEVEL LEFT-HANDED SYSTEM

2014 ◽  
Vol 28 (04) ◽  
pp. 1450024
Author(s):  
N. BOUTABBA
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
Negative Permittivity ◽  
Electromagnetic Properties ◽  
Thermal Bath ◽  
Potential Candidate ◽  
Left Handed ◽  
Atomic Medium ◽  
Coupling Strengths ◽  
Domain Of Parameters

In this paper, we theoretically analyze the electromagnetic properties of a negative refractive index medium configured as a four-level system under thermal bath effect. For different thermal bath coupling strengths, the system shows negative permittivity and permeability as well as a large negative refractive index. This atomic medium is stable against environmental effect in a large experimental reachable domain of parameters which makes it a potential candidate for important applications.

Measurement of Effective Negative Refractive Index of Two-Dimensional Photonic Crystal Slabs

2017 ◽  
Vol 37 (6) ◽  
pp. 0616001
Author(s):  
蒋 强 Jiang Qiang ◽  
陈家璧 Chen Jiabi ◽  
梁斌明 Liang Binming ◽  
王 燕 Wang Yan ◽  
庄松林 Zhuang Songlin
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Negative Refractive Index ◽  
Two Dimensional ◽  
Dimensional Photonic Crystal ◽  
Photonic Crystal Slabs ◽  
Two Dimensional Photonic Crystal

scholarly journals Some aspects of mass-energy equivalence which appears in left-handed metamaterials

2019 ◽  
Vol 6 ◽  
pp. 16 ◽  
Author(s):  
Naghi Gasimov ◽  
Muharrem Karaaslan ◽  
Cumali Sabah ◽  
Faruk Karadag
Keyword(s):  
Refractive Index ◽  
Composite Structures ◽  
Negative Refractive Index ◽  
Thought Experiment ◽  
Mass Energy ◽  
Negative Mass ◽  
Left Handed ◽  
Energy Equivalence ◽  
Phase And Group Velocities ◽  
Group Velocities

In this work, the concept of mass-energy equivalence in left-handed metamaterials is discussed by following Einstein's box thought experiment. Left-handed metamaterials are artificial composite structures that exhibit unusual properties, especially negative refractive index, in which phase and group velocities are directed oppositely. Equation E = mc2 assumes that, in vacuum, the propagation of an electromagnetic radiation from emitter to receiver is accompanied by the transfer of mass. It was hypothesized previously that if the space between emitter and receiver is medium with a negative refractive index, then radiation transfers the mass not from the emitter to receiver as expected, but rather from the receiver to the emitter due to the opposite directions of phase and group velocities. In this paper, it is shown that even though one radiating atom is taken, the negative mass transferring must be in force. In particular, it means that, if the atom radiates a photon in a medium with negative refractive index, photon transfers the mass not from the atom, but to the atom.

scholarly journals 2-D isotropic negative refractive index in a N-type four-level atomic system

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Shun-Cai Zhao ◽  
Qi-Xuan Wu ◽  
Kun Ma
Keyword(s):  
Refractive Index ◽  
Atomic System ◽  
Negative Refractive Index ◽  
Negative Permittivity ◽  
Two Dimensional ◽  
Orthogonal Signal ◽  
Wave Fields ◽  
Left Handedness ◽  
Permittivity And Permeability ◽  
Or Applications

Abstract2-D(Two-dimensional) isotropic negative refractive index (NRI) is explicitly realized via the orthogonal signal and coupling standing-wave fields coupling the Ntype four-level atomic system. Under some key parameters of the dense vapour media, the atomic system exhibits isotropic NRI with simultaneous negative permittivity and permeability (i.e. left-handedness) in the 2-D x-y plane. Compared with other 2-D NRI schemes, the coherent atomic vapour media in our scheme may be an ideal 2-D isotropic NRI candidate and has some potential advantages, significance or applications in the further investigation.

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