Near-field effect in an ultrathin nonlinear film of resonant atoms

Gadomskiǐ, O. N.; Sukhov, Sergey

doi:10.1070/qe1998v028n06abeh001261

Cited by 4 publications

(3 citation statements)

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“…The latter is predicted theoretically to occur in nonlinear resonant optical phenomena as one goes over from the microscopic to the macroscopic field using the relations (8.2) in the modified Bloch equations [24]. The near field effect introduces the structural factor and is also taken into account by the relation (8.12) if an optical effect is, for example, considered in a superthin film consisting of resonant atoms [73].…”

Section: Resultsmentioning

confidence: 98%

Two electron problem and the nonlocal equations of electrodynamics

Gadomskiǐ

2000

Phys.-Usp.

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A survey is offered for the current knowledge of nonlocal electrodynamic equations which in some cases (e.g., in solving boundary value problems in optics) can replace Maxwell's equations. The nonlocal equations are derived using the semi-classical or quantum-electrodynamic approaches. The former involves an expansion of retarded potentials in appropriate parameters and a subsequent transition, to terms of orderto quantum mechanical operators in the Lagrangian of a system of moving charges. The latter approach is to consider second-and third-order quantum electrodynamic effects for two hydrogen-like atoms arbitrarily far apart. Various nonlocal equations are derived for the propagation of photons and electromagnetic waves in spin systems, dielectrics, and metals, taking into account a variety of quantum transitions and intermediate states in the spectrum of the interacting atoms. By combining nonlocal field equations with relevant constitutive equations, a number of typical boundary-value optical problems are solved for semi-infinite media, superthin films, and for objects whose linear dimensions are much smaller than the light wavelength.

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Section: Resultsmentioning

confidence: 98%

Two electron problem and the nonlocal equations of electrodynamics

Gadomskiǐ

2000

Phys.-Usp.

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“…For example, these interface effects are the reason for a depolarization phenomenon [ 18 ]. There are numerous works focused on the study of the optical properties of small particles or small particle systems [ 19 , 20 , 21 ]. There are some papers concerning the optical properties of thin and ultrathin films [ 18 , 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Mechanism of the Gold Cluster Growth during Heating of the Composite Gold-Polytetrafluoroethylene Thin Film

et al. 2012

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Nanocomposite films consisting of gold inclusions in the polytetrafluoroethylene (PTFE) matrix were obtained by thermal vacuum deposition. Annealing of the obtained films with different temperatures was used to measure varying of film morphologies. The dependence of optical properties of the films on their morphology was studied. It was established that absorption and profile of the nanocomposite film obtained by thermal vacuum deposition can be changed with annealing owing to the fact that different annealing temperatures lead to different average particle sizes. A method to calculate the optical properties of nanocomposite thin films with inclusions of different sizes was proposed. Thus, comparison of experimental optical spectra with the spectra obtained during the simulation enables estimating average sizes of inclusions. The calculations give the possibility of understanding morphological changes in the structures.

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“…There are numerous works where the optical properties of small particles or systems of small particles were studied 5–7. One can point out the works where thin and ultra‐thin film optical properties were studied 4, 8–12. On the other hand, three‐component nanocomposite thin films attract attention of technologists and physicists because of the widely varying potential of their physical properties.…”

Section: Introductionmentioning

confidence: 99%

Modelling of optical absorption of three-component nanocomposite thin films

Lozovski

Khihlovski

Grytsenko

et al. 2010

phys. stat. sol. (b)

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The absorption profiles of different types of nanocomposite thin films were calculated in the framework of an effective susceptibility approach. The approach is based on the Green function method and allows calculations of the optical properties of thin films with an inhomogeneous distribution of inclusions. Two different types of three-component nanocomposites were considered: nanocomposites consisting of two types of spherical particles of the same dimensions embedded into a dielectric matrix and nanocomposites consisting of coreshell particles embedded into a dielectric matrix. Both the partial concentrations of the spherical particles and the shell parts in the compound particles strongly influence the absorption profiles of the films. The influence of the film thickness on the absorption profiles for both types of nanocomposite films was obtained.

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Near-field effect in an ultrathin nonlinear film of resonant atoms

Cited by 4 publications

References 1 publication

Two electron problem and the nonlocal equations of electrodynamics

Two electron problem and the nonlocal equations of electrodynamics

Evaluation of the Mechanism of the Gold Cluster Growth during Heating of the Composite Gold-Polytetrafluoroethylene Thin Film

Modelling of optical absorption of three-component nanocomposite thin films

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