High‐resolution measurements of the bulk dielectric constants of single crystal gold with application to reflection anisotropy spectroscopy

Blanchard, N. P.; Cm, Smith; Martin, D. S.; Hayton, D. J.; Jenkins, Tim; Weightman, P.

doi:10.1002/pssc.200303828

Cited by 36 publications

(122 citation statements)

References 19 publications

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“…1) from the clean, well-ordered Au(110)1x2 surface is in good agreement with previous RA spectra of this surface [2,3,[7][8][9][10][11][12] and is characterized by negative peaks at 2.5 eV and 3.5 eV. The LEED and STM data (Fig.…”

Section: Resultssupporting

confidence: 86%

“…It is generally accepted that the RAS in the spectral region 1.5 eV to 2.2 eV of the Au(110)1x2 surface has major contributions from the surface states [2,7,[10][11][12]. An analysis of the RAS of the Au(110)1x2 by Martin et al [13] in terms of a derivative model has established that the region at the RAS of the Au(110)1x2 surface from 2.5 eV to 4.5 eV is dominated by transitions between bulk band states that are modified by the surface structure.…”

Section: Discussionmentioning

confidence: 99%

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The RAS of two monolayers of Pd deposited on the Au(110)1 × 2 surface

Almond

Blanchard

Martin

et al. 2005

phys. stat. sol. (c)

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We compare the RAS of the Au(110)1x2 surface and the RAS of surfaces formed by depositing and then annealing two monolayers of Pd deposited on the Au(110)1x2 surface. The similarities and differences between the RAS of the Au(110) 1x2 surface and the annealed Pd/Au(110) surface are consistent with the view that annealing gives rise to the formation of a Au overlayer on top of a mixed Pd/Au layer. The RAS suggests that the Au overlayer gives rise to the surface states found on the Au(110) 1x2 surface.

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Section: Resultssupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

The RAS of two monolayers of Pd deposited on the Au(110)1 × 2 surface

Almond

Blanchard

Martin

et al. 2005

phys. stat. sol. (c)

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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%

“…Measurement of the optical frequency dependence of the dielectric function of gold has been the subject of several investigations over many years, motivated by the need to understand its fundamental electron behavior [1][2][3][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, the index of refraction of films with thicknesses 34 nm and 46 nm deposited onto fused-quartz substrates was measured by reflection and transmission from 0.50 -6.5 eV (190 nm -2.48 µm) by Johnson and Christy in 1972 [1,26]. Transmission of IR light through a gold parallel plate waveguide spectral range using spectroscopic ellipsometry [8].…”

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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Modification of the Optical Spectrum of Cytosine by the Formation of an Ordered Monolayer of Molecules at a Au(110)/Electrolyte Interface

Bowfield

Mansley

et al. 2015

ChemPhysChem

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An analysis of the reflection anisotropy spectrum (RAS) of an ordered monolayer of cytosine adsorbed at a Au(110)/electrolyte interface is found to contain optical contributions from both the substrate and the cytosine. The spectrum of cytosine in an aqueous environment is significantly broadened by the interaction between the molecule and the Au(110). Successful simulations of the Au(110)/cytosine interface consisting of two additional molecular transitions, which sit in the middle of previously observed molecular absorption bands, are produced by an empirical Lorentzian transition model that is consistent with previous theoretical and experimental studies. While this analysis alone cannot determine the number of π→π* dipole transitions, it confirms that the only cytosine transitions that contribute to the optical response of the Au(110)/cytosine interface are located in the plane of the molecule, which is vertical to the gold surface with the long axis along the [1$\bar 1$0] direction.

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High‐resolution measurements of the bulk dielectric constants of single crystal gold with application to reflection anisotropy spectroscopy

Cited by 36 publications

References 19 publications

The RAS of two monolayers of Pd deposited on the Au(110)1 × 2 surface

The RAS of two monolayers of Pd deposited on the Au(110)1 × 2 surface

Optical dielectric function of gold

Modification of the Optical Spectrum of Cytosine by the Formation of an Ordered Monolayer of Molecules at a Au(110)/Electrolyte Interface

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