Filmed Surfaces for Reflecting Optics*

Hass, G.

doi:10.1364/josa.45.000945

Cited by 161 publications

(55 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Silver has many scientific applications due to its high electrical and thermal conductivity [1] as well as its unique properties as an optical reflector [2,3]. These properties make Ag perfect for coatings on solar cells and lowemissivity (Low-E) windows amongst other applications [4,5].…”

Section: Introductionmentioning

confidence: 99%

Development of a ReaxFF potential for Ag/Zn/O and application to Ag deposition on ZnO

et al. 2016

View full text Add to dashboard Cite

A new empirical potential has been derived to model an Ag-Zn-O system. Additional parameters have been included into the reactive force field (ReaxFF) parameter set established for ZnO to describe the interaction between Ag and ZnO for use in molecular dynamics (MD) simulations. The reactive force field parameters have been fitted to density functional theory (DFT) calculations performed on both bulk crystal and surface structures. ReaxFF accurately reproduces the equations of state determined for silver, silver zinc alloy and silver oxide crystals via DFT. It also compares well to DFT binding energies and works of separation for Ag on a ZnO surface. The potential was then used to model single point Ag deposition on polar (0001) and non-polar (1010) orientations of a ZnO wurtzite substrate, at di↵erent energies. Simulation results then predict that maximum Ag adsorption on a ZnO surface requires deposition energies of  10 eV.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of a ReaxFF potential for Ag/Zn/O and application to Ag deposition on ZnO

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Because of the oxide layer, the derived reflectance is smaller than the value reported for polished aluminum reflecting "incandescent" light (0.69; Weast, 1975;Sect. E) and significantly smaller than the value for vacuum-deposited aluminum at visible wavelengths (0.97; Hass, 1955).…”

Section: Radiative Propertiesmentioning

confidence: 66%

Hotplate precipitation gauge calibrations and field measurements

Zelasko¹,

Wettlaufer²,

Borkhuu³

et al. 2018

Atmos. Meas. Tech.

View full text Add to dashboard Cite

Abstract. First introduced in 2003, approximately 70 YankeeEnvironmental Systems (YES) hotplate precipitation gauges have been purchased by researchers and operational meteorologists. A version of the YES hotplate is described in Rasmussen et al. (2011; R11). Presented here is testing of a newer version of the hotplate; this device is equipped with longwave and shortwave radiation sensors. Hotplate surface temperature, coefficients describing natural and forced convective sensible energy transfer, and radiative properties (longwave emissivity and shortwave reflectance) are reported for two of the new-version YES hotplates. These parameters are applied in a new algorithm and are used to derive liquidequivalent accumulations (snowfall and rainfall), and these accumulations are compared to values derived by the internal algorithm used in the YES hotplates (hotplate-derived accumulations). In contrast with R11, the new algorithm accounts for radiative terms in a hotplate's energy budget, applies an energy conversion factor which does not differ from a theoretical energy conversion factor, and applies a surface area that is correct for the YES hotplate. Radiative effects are shown to be relatively unimportant for the precipitation events analyzed. In addition, this work documents a 10 % difference between the hotplate-derived and new-algorithmderived accumulations. This difference seems consistent with R11's application of a hotplate surface area that deviates from the actual surface area of the YES hotplate and with R11's recommendation for an energy conversion factor that differs from that calculated using thermodynamic theory.

show abstract

“…It is well known that, in general, a reduction in vacuum pressure is accompanied by increases in aluminum film conductivity, density, and most importantly for nearfield applications, a decrease in surface topography and increase in optical density. 28,[34][35][36] The results from these studies, however, are difficult to extend to the particular case of near-field tips. While it is generally true that coatings improve with decreasing pressure, it is not a simple linear function.…”

Section: A Vacuum Background Pressurementioning

confidence: 93%

Evaluation of thermal evaporation conditions used in coating aluminum on near-field fiber-optic probes

Hollars¹,

Dunn²

1998

Review of Scientific Instruments

View full text Add to dashboard Cite

The effects that the thermal evaporation conditions have on the roughness of aluminum-coated near-field fiber-optic probes were investigated using the high-resolution capabilities of atomic force microscopy. The coating conditions studied include the effects of background gas composition, base vacuum pressure, and aluminum evaporation rate. The effects of aging on the aluminum-coated tips were also evaluated. The results from topography measurements of the resulting aluminum film indicated that the most dramatic improvements in the tip coatings can be achieved using high aluminum evaporation rates at base vacuum pressures below 10 Ϫ5 Torr. These results agree with other studies on thin aluminum films and reflect a decrease in oxide formation. For demanding applications of near-field microscopy requiring maximal resolution, the results presented here indicate that it may also be necessary to reduce oxygen and/or water from the vacuum chamber prior to coating.

show abstract

Filmed Surfaces for Reflecting Optics*

Cited by 161 publications

References 16 publications

Development of a ReaxFF potential for Ag/Zn/O and application to Ag deposition on ZnO

Development of a ReaxFF potential for Ag/Zn/O and application to Ag deposition on ZnO

Hotplate precipitation gauge calibrations and field measurements

Evaluation of thermal evaporation conditions used in coating aluminum on near-field fiber-optic probes

Contact Info

Product

Resources

About