Optical properties of metals

Weaver, J. H.; Krafka, C.; Lynch, David W.; Koch, E. E.

doi:10.1364/ao.20.1124_1

Cited by 166 publications

(169 citation statements)

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“…For comparison, data from Johnson and Christy [1] (circles), Thèye [6] (squares, from tabulated data in [2]), Schulz [19,20] (down-triangle), Weaver et al [16] (up-triangle), and Blanchard et al [8] (crosses) are plotted. The thin gray dashed line shows the dielectric function calculated for a Drude free electron metal with ω p = 8.48 eV and Γ = 0.0484 eV, as discussed below.…”

Section: Resultsmentioning

confidence: 99%

“…5 and 6, respectively. For comparison, data are shown from Johnson and Christy [1] (circles), Dold and Mecke [24] (square, from tabulated data in [2]), Bennett and Bennett [25] (pentagon), Bolotin et al [22] (left-triangles), Motulevich and Shubin [23] (down-triangle), Padalka and Shklyarevskii [21] (diamond), and Weaver et al [16] (up-triangle). In the region of spectral overlap of the UV/vis and IR ellipsometers, between 0.62 eV and 0.99 eV (1.3 -2.0 µm) we plot the mean of the dielectric function values weighted as a percentage by the proximity to the edge of the measurement range of each instrument.…”

Section: Resultsmentioning

confidence: 99%

“…The data of Weaver are yet lower by nearly a factor of 2 compared to the TS data. The data from Weaver are included to illustrate some of the effects of cryogenic temperatures on the optical dielectric function, as those data were measured at 4.2 K [16]. Temperature effects will be discussed in greater detail below.…”

Section: Discussionmentioning

confidence: 99%

“…Using dielectric function values from [6] vs. [16], the predicted L spp varies by 50% at 1 eV, and 33% at 2 eV. 4) The Scattering linewidth of a noble metal nanoparticle, related to the plasmon dephasing time, exhibits a large sensitivity to the dielectric function, with a variation of up to 30% using different optical data in a finite difference time domain model ( [6] vs. [1]) [29].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, we have focused on works where the data are available in tabulated form. A more comprehensive list of dozens of ǫ r and N measurements up to 1981 is listed with methods and energy ranges in [16]. Notably, the measurements of Thèye and Dold and Mecke are contained in a compilation by Lynch and Hunter, edited by Palik [17].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical dielectric function of gold

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Solar Energy Materials

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2003

Advanced Materials

343

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Solar energy materials have properties tailored to meet requirements set by the spectral distribution, angle of incidence, and intensity of the electromagnetic radiation prevailing in our natural surroundings. Specifically, the optimization can be performed with regard to solar irradiation, thermal emission, atmospheric absorption, visible light, and photosynthetic efficiency. Materials for thermal and electrical conversion of solar energy in man‐made collectors, as well as for energy‐efficient passive design in architecture, are typical examples. This paper reviews solar energy materials with emphasis on the thermal applications of a variety of types. Electrical applications are given a more cursory exposition, the reason being that a systems perspective—rather that a materials perspective—is most fruitful in this case.

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Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

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Hsiao,

Wang

et al. 2023

Advanced Optical Materials

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This study displays the emissivities and optical properties of thin‐film metallic glasses in the thermal infrared (IR) region. It is found that the amorphous structure of the metallic glass hinders the movement of electrons, leading to unique optical properties in the thermal IR region. Measurements of the optical constants of NiNb thin‐film metallic glasses reveal that a high processing pressure and sputtering power yield high optical conductivity and a low damping constant. Adjusting the parameters of the sputtering processes allows the fabrication of thin‐film metallic glasses with a range of damping constants and also the change in the reflectance and emissivity. Applying optical thin film theory, the emissivity of thin‐film metallic glass in the thermal IR region can be modulated. The measured emissivity of the thin‐film metallic glass (45.35%) is significantly enhanced when compared with that of a Si substrate or metal film. Furthermore, the cooling ability of the optimal metallic glass is much higher than that of Si and metal films. These findings reveal that metallic glass films can display thermal radiative properties superior to those of metals and semiconductors, making them promising materials for use in electronic devices with excellent mechanical characteristics and heat dissipation properties.

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Optical properties of metals

Cited by 166 publications

References 0 publications

Optical dielectric function of gold

Optical dielectric function of gold

Solar Energy Materials

Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

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