Dielectric and optical properties close to the percolation threshold. II

Brouers, F.; Clerc, Jean-Pierre; Giraud, G.; Laugier, J.M.; Randriamantany, Z. A.

doi:10.1103/physrevb.47.666

Cited by 67 publications

(51 citation statements)

References 30 publications

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“…Furthermore, we show that this phenomenon is similar to the high absorption of light observed in metal-dielectric composites 27,28 such as Au-glass, [29][30][31] Ag-glass, 32 and Co-Al 2 O 3 . 33 Its origin is fundamentally different from that of other black materials such as microstructured Si 34 or Ni-P 35 for which a rough surface morphology is essential.…”

Section: Introductionsupporting

confidence: 62%

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Highly absorbing black Mg and rare-earth-Mg switchable mirrors

2004

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Apart from a reflecting and a transparent state, rare-earth-Mg alloys ͑RE-Mg͒ exhibit also a highly absorbing, black state during loading with hydrogen. The occurrence of such a black state is due to the disproportionation into subwavelength size REH 2ϩ⑀ and Mg grains during the first hydrogen loading. While the optical properties of REH x change continuously with a further increase in hydrogen concentration x, Mg changes abruptly from a good reflector to a transparent insulator (MgH 2 ). Thin pure Mg films also show this black state when ͑un͒loaded carefully at elevated temperatures. By using the Bruggeman effective medium approximation in combination with the transfer matrix method it is shown that the coexistence of Mg and MgH 2 grains is the cause of this high absorption. Furthermore, we compare this phenomenon to the high absorption of light observed in metal-dielectric composites.

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Section: Introductionsupporting

confidence: 62%

“…This ͑self-consistent͒ approximation is able to model absorption over a large wavelength range and gives good results near the percolation threshold. 32,27,31 In this model …”

Section: Modeling a Effective Medium Theorymentioning

confidence: 99%

Highly absorbing black Mg and rare-earth-Mg switchable mirrors

2004

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“…These e!ects will be discussed in Section 7. Yet, the quasistatic approximation signi"cantly simpli"es theoretical considerations of the "eld #uctu-ations and describes well the optical properties of semicontinuous "lms providing qualitative (and in some cases, quantitative) agreement with experimental data [12,20,98,99].…”

Section: Numerical and Experimental Studies Of 5eld Distributions In mentioning

confidence: 89%

“…The e!ective properties of the 2D¸}R}C lattices have been intensively studied during the last decade [12,20,98,99]. However, there was not much attention paid to the fact that the spatial distributions of the local "elds in such systems can exhibit rich nontrivial behavior.…”

Section: Numerical and Experimental Studies Of 5eld Distributions In mentioning

confidence: 99%

“…In the optical frequency range, when the frequency, , is much larger than the relaxation rate \ of the metallic component, a semicontinuous metal "lm can be thought of as a 2D¸}R}C lattice [12,20,98,99]. As above, the capacitance C stands for the gaps between metal grains that are "lled by dielectric material (substrate), with the dielectric constant .…”

Section: Numerical and Experimental Studies Of 5eld Distributions In mentioning

confidence: 99%

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