نتایج جستجو برای: electromagnetic absorption

تعداد نتایج: 205503  

Journal: :international journal of optics and photonics 0
siamak khademi department of physics, university of zanjan samira alipour department of physics, university of zanjan

the semi-classical model of atom-field interaction has been fully studied for some multilevel atoms, e.g. vee, l, cascade x , y, and inverted y and so on. this issue is developed into the full-quantum electrodynamics formalism, where the probe and coupling electromagnetic fields are quantized. in this article, we investigate the full-quantum model of absorption and dispersion spectrum of trappe...

Journal: :Optics express 2012
Kenneth J Chau Henri J Lezec

We propose a set of postulates to describe the mechanical interaction between a plane-wave electromagnetic pulse and a dispersive, dissipative slab having a refractive index of arbitrary sign. The postulates include the Abraham electromagnetic momentum density, a generalized Lorentz force law, and a model for absorption-driven mass transfer from the pulse to the medium. These opto-mechanical me...

1999
Truong Nguyen

Loading effects of aircraft seats in an electromagnetic reverberating environment are investigated. The effects are determined by comparing the reverberation chamber’s insertion losses with and without the seats. The average per-seat absorption cross-sections are derived for coach and first class seats, and the results are compared for several seat configurations. An example is given for how th...

ژورنال: مواد پرانرژی 2017

Military equipments containing energetic materials are conventionally ignited by heat and through an explosive train. Heat is often created by a flame or electricity from a resistive wire. Energetic materials used in these systems due to electrical inseparation from the surrounded medium are exposed to different electromagnetic radiations and so unexpected ignitions of them are probable. In thi...

Alikhanzadeh-Arani, S, Almasi-Kashi, M, Mokarian, M H,

In this research, FeNi@PANI nanocomposites as the electromagnetic wave absorbers were prepared through two following steps. At first, FeNi alloy nanoparticles were synthesized by the one-pot polyol process, and then, in-situ polymerization method was used for the preparation of FeNi@PANI nanocomposite. The XRD pattern confirmed the formation of pure FeNi alloy with the FCC crystalline phase. Th...

2012
Shigenori Togashi

A pilot plant for continuous flow microwave-assisted chemical reaction combined with microreactors was developed and water heating tests were conducted for evaluation of the developed plant. We developed a microwave apparatus having a single microwave generator that can heat reaction solutions in four reaction fields simultaneously in order to increase throughput. We also designed a four-branch...

2012
Md. Selim Hossain Ruhul Amin Md. Salim Hossain Rahul Amin

This paper deals with the numerical computation of electromagnetic (EM) energy absorption by biological tissues. It is indeed one of the important challenges for the computational EM community to estimate rate of EM energy absorption by human tissues to asses the potential health hazard quantitatively. This is usually quantified in terms of SAR, which is the normalized rate of energy absorbed b...

2010
S. Gu J. P. Barrett S. A. Cummer

Artificially engineered metamaterials have enabled the creation of electromagnetic materials with properties not found in nature. Recent work has demonstrated the feasibility of developing high performance, narrowband electromagnetic absorbers using such metamaterials. These metamaterials derive their absorption properties primarily through dielectric loss and impedance matching at resonance. T...

2016
Jacob Linder Klaus Halterman

Exerting well-defined control over the reflection (R), absorption (A), and transmission (T) of electromagnetic waves is a key objective in quantum optics. To this end, one often utilizes hybrid structures comprised of elements with different optical properties in order to achieve features such as high R or high A for incident light. A desirable goal would be the possibility to tune between all ...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2014
Christophe Craeye Stafford Withington Christopher N Thomas

Periodic thin-film structures are widely used as absorptive structures for electromagnetic radiation. We show that the absorption behavior for partially coherent illumination can be fully characterized by a set of characteristic functions in wavenumber space. We discuss the prediction of these functions using electromagnetic solvers based on periodic boundary conditions, and their measurement e...

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