Christus als Fürst der Tafel. Ein neu entdecktes Wandmalereifragment im Schloss von Babenhausen

Krenn, Margit

doi:10.1524/9783050062396.297

Cited by 1 publication

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“…Temperature effects will be discussed in greater detail below. Our results agree with related measurements on similar samples in the visible [42,43].…”

Section: Discussionsupporting

confidence: 93%

Optical dielectric function of gold

et al. 2012

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In metal optics gold assumes a special status because of its practical importance in opto-electronic and nano-optical devices, and its role as a model system for the study of the elementary electronic excitations that underlie the interaction of electromagnetic fields with metals. However, largely inconsistent values for the frequency dependence of the dielectric function describing the optical response of gold are found in the literature [1][2][3]. We performed precise spectroscopic ellipsometry measurements on evaporated gold, template-stripped gold, and single-crystal gold to determine the optical dielectric function across a broad spectral range of 300 nm -25 µm (0.05 -4.14 eV) with high spectral resolution. We fit the data to the Drude free-electron model, with an electron relaxation time τD = 14 ± 3 fs and plasma energy ωp = 8.48 eV. We find that the variation in dielectric functions for the different types of samples is small compared to the range of values reported in the literature. Our values, however, are comparable to the aggregate mean of the collection of previous measurements from over the past six decades. This suggests that although some variation can be attributed to surface morphology, the past measurements using different approaches seem to have been plagued more by systematic errors than previously assumed.

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“…Temperature effects will be discussed in greater detail below. Our results agree with related measurements on similar samples in the visible [42,43].…”

Section: Discussionsupporting

confidence: 93%