Journal ArticleDOI
Optical properties of Al, Fe, Ti, Ta, W, and Mo at submillimeter wavelengths.
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TLDR
This work has used a nonresonant cavity to measure the angle averaged absorptance spectra P(omega) of aluminum, molybdenum, tantalum, titanium, tungsten, and iron in the 30-300-cm(-1) wavenumber region.Abstract:
Measurements of the optical constants of metals at submillimeter wavelengths are sparse. We have used a nonresonant cavity to measure, at room temperature, the angle averaged absorptance spectra P(omega) of aluminum, molybdenum, tantalum, titanium, tungsten, and iron in the 30-300-cm(-1) wavenumber region. The real part of the normalized surface impedance spectrum, z(omega) = r(omega) + ix(omega), was determined from P(omega). Measurements were also made on iron from 400 to 4000 cm(-1) using standard reflectance techniques. The r(omega) spectrum was combined with previous measurements by others at higher frequencies and Kramers-Kronig analyses of the resultant combined r(omega) spectra provided epsilon(omega) = epsilon(1)(omega) + iepsilon(2)(omega) and N(omega) = n(omega) + ik(omega).read more
Citations
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Low-temperature opacities
Jason W. Ferguson,David R. Alexander,Travis S. Barman,Julia G. Bodnarik,Peter H. Hauschildt,Amanda Heffner-Wong,A. Tamanai,A. Tamanai +7 more
TL;DR: In this paper, the authors presented a new table for low-temperature Rosseland and Planck mean opacities from Alexander & Ferguson, which includes more grain species and updated optical constants.
Journal ArticleDOI
Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
Tom Seifert,Samridh Jaiswal,Samridh Jaiswal,Ulrike Martens,John Hannegan,Lukas Braun,Pablo Maldonado,Frank Freimuth,Alexander Kronenberg,J. Henrizi,Ilie Radu,Eric Beaurepaire,Yuriy Mokrousov,Peter M. Oppeneer,Martin Jourdan,Gerhard Jakob,Dmitry Turchinovich,L. M. Hayden,Martin Wolf,Markus Münzenberg,Mathias Kläui,Tobias Kampfrath +21 more
TL;DR: In this article, a W/CoFeB/Pt trilayer was used to generate a 1.30 THz range of trilayers from photo-induced spin currents, the inverse spin Hall effect and a broadband Fabry-Perot resonance.
Journal ArticleDOI
Algorithm for the determination of intrinsic optical constants of metal films: application to aluminum
TL;DR: Optical and electron-energy-loss data for evaporated-aluminum films have been critically analyzed and used in an iterative, self-consistent algorithm that represents a combination of the Kramers-Kronig analysis and the semiquantum-model application.
Journal ArticleDOI
The evolution of amorphous hydrocarbons in the ISM: dust modelling from a new vantage point
Anthony P. Jones,Anthony P. Jones,L. Fanciullo,L. Fanciullo,M. Köhler,M. Köhler,L. Verstraete,L. Verstraete,Vincent Guillet,Vincent Guillet,M. Bocchio,M. Bocchio,Nathalie Ysard,Nathalie Ysard +13 more
TL;DR: In this paper, a power-law distribution of small a-C grains and log-normal distributions of large a-SilFe and aC(:H) grains are used to explore dust evolution in the interstellar medium, and it is shown that mantle accretion in molecular clouds and UV photo-processing in photodominated regions are likely the major drivers of dust evolution.
References
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Journal ArticleDOI
Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared
TL;DR: The data for the noble metals and Al, Pb, and W can be reasonably fit using the Drude model and it is shown that -epsilon1(omegas) = epsilon2(omega) approximately omega(2)(p)/(2omega( 2)(tau) at the damping frequency omega = omega(tau), where the plasma frequency is omega(p).
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Optical properties of fourteen metals in the infrared and far infrared: Al, Co, Cu, Au, Fe, Pb, Mo, Ni, Pd, Pt, Ag, Ti, V, and W.
TL;DR: Refinements in the fitting technique have resulted in only slight changes in the Drude model parameters for Al, Au, Ag, and W, and the optical resistivity has been calculated from the Druded model parameters ωτ and ωp and compared to handbook values for the dc resistivity.
Journal ArticleDOI
Optical properties of Au, Ni, and Pb at submillimeter wavelengths
TL;DR: An exact analytical expression for P(omega) of a metal is derived by using a nonresonant cavity to measure at ambient temperature the angle averaged absorptance spectra of gold, nickel, and lead in the 30-300-cm(-1) wave-number region.
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Equations linking different sets of optical properties for nonmagnetic materials.
TL;DR: Pour caracteriser les proprietes optiques des materiaux on utilise l'indice de refraction complexe, la fonction dielectriquecomplexe, l'impedance complexe normalisee and the conductivite complexe.
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Absolute measurement of the far-infrared surface resistance of Pb
G. Brändli,A. J. Sievers +1 more
TL;DR: In this paper, the surface resistance of Pb has been measured using a new technique of parallel-plate waveguides, made from two rolled-metal foils and a dielectric spacing material or by evaporating the metal directly on both surfaces of the dielectrics and thus preventing the air from oxidizing the measured metal surface.