Optical refractive index of massive particles and physical meanings of left-handed media

Nonlinear magnetostatic surface wave in a slab waveguide structure has been investigated. The design consisted of dielectric film between two thick nonlinear nonmagnetic negative permittivity material (NPM) layers. A dispersion relation for TE nonlinear Magnetostatic surface waves (NMSSWs) has been derived into the proposed structure and has been numerically investigated. Effective refractive index decreases with thickness and frequency increase have been found. Effective refractive index decrease with optical nonlinearity increase and switching to negative values of effective refractive index at a certain value of optical nonlinearity have been found. This meant that the structure behaved like a left-handed material over certain range. We found that the power flow was changing by changing the operating frequency, the dielectric film thickness, and the optical nonlinearity. Also, the effective refractive index and power flow attained constant values over certain values of dielectric constant values.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.816-817.242 ◽

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.

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

Science of Sintering ◽

10.2298/sos0702185d ◽

2007 ◽

Vol 39 (2) ◽

pp. 185-191 ◽

Cited By ~ 3

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. .

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Analysis of properties of metamaterial-based composite system

International Journal of Modern Physics B ◽

10.1142/s0217979219501546 ◽

2019 ◽

Vol 33 (15) ◽

pp. 1950154 ◽

Cited By ~ 2

Author(s):

N. Abirami ◽

K. S. Joseph Wilson

Keyword(s):

Magnetic Field ◽

Refractive Index ◽

Resonance Frequency ◽

Applied Magnetic Field ◽

Effective Refractive Index ◽

Composite System ◽

The Real ◽

Left Handed

Magneto tunable left-handed material (LHM) which acts as a composite system has been theoretically demonstrated. The variation of the real and imaginary parts of the effective refractive index of the system is studied. The resonance that occurs in these studies are analyzed. The variation of impedance, reflectivity, absorptivity with frequency of the composite system was observed. The changes in resonance frequency with applied magnetic field are investigated. It is found that the resonance frequency increases with applied magnetic field.

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Nonlinear Intersubband Optical Absorption Coefficient and Refractive Index Changes in Asymmetric Parabolic Double Quantum Wells

Journal of Advanced Physics ◽

10.1166/jap.2017.1307 ◽

2017 ◽

Vol 6 (1) ◽

pp. 121-125 ◽

Cited By ~ 1

Author(s):

Menberu Mengesha Woldemariam

Keyword(s):

Refractive Index ◽

Optical Absorption ◽

Absorption Coefficient ◽

Quantum Wells ◽

Optical Absorption Coefficient ◽

Double Quantum ◽

Absorption Coefficients ◽

Total Change ◽

Left Handed ◽

Index Changes

The change in optical absorption coefficients and refractive index in GaAs-AlGaAs asymmetric parabolic double quantum wells (DQWs) with applied electric field are studied in detail. Analytical expressions for the linear, nonlinear and total intersubband absorption coefficient and refractive index changes are obtained by using compact density matrix approach. It is found that the magnitude of the nonlinear part of the change in refractive index and absorption coefficients are larger than the linear part in the given frequency region. The value of the total change in refractive index is negative and the asymmetric DQWs becomes left handed media. This property is of great importance for metamaterials science and can contribute substantially to the present search for simple and inexpensive left handed media. Moreover the negative value of the total change in absorption coefficient may be used for developing optical device such as maser at different frequency regime.

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

Journal of Physics Conference Series ◽

10.1088/1742-6596/36/1/002 ◽

2006 ◽

Vol 36 ◽

pp. 6-11 ◽

Cited By ~ 5

Author(s):

Koray Aydin ◽

Kaan Guven ◽

Ekmel Ozbay

Keyword(s):

Refractive Index ◽

Negative Refractive Index ◽

Two Dimensional ◽

Left Handed

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COMPARISONS OF NEGATIVE REFRACTION IN LEFT-HANDED MATERIALS AND PHOTONIC CRYSTALS

International Journal of Modern Physics B ◽

10.1142/s0217979205032371 ◽

2005 ◽

Vol 19 (23) ◽

pp. 3547-3561

Author(s):

LIANG FENG ◽

XIAO-PING LIU ◽

JIE REN ◽

YAN-FENG CHEN ◽

YONG-YUAN ZHU

Keyword(s):

Refractive Index ◽

Electromagnetic Wave ◽

Photonic Crystals ◽

Negative Refraction ◽

Positive Phase ◽

Negative Phase ◽

Negative Group ◽

Perfect Lens ◽

Left Handed ◽

Negative Refractions

Using the equifrequency surfaces (EFS) to describe negative refractions in left-handed materials (LHMs) and photonic crystals (PCs), negative phase and negative group refractive indexes in LHMs were compared with positive phase and negative group refractive indexes in PCs. The refractive indexes in PCs were dependent on frequencies and incident angles of electromagnetic wave, while indexes in LHMs were constant in the left-handed region. Furthermore, the phase compensating effect resulting from the negative phase refractive index was addressed to distinguish the perfect lens made of LHMs from the superlens realized in the all angle negative refraction (AANR) region of PCs.

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