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Phys. Rev. B 77, 161404(R) (2008) [4 pages]

Measurement and density functional calculations of optical constants of Ag and Au from infrared to vacuum ultraviolet wavelengths

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Wolfgang S. M. Werner*
Institut für Allgemeine Physik, Vienna University of Technology, Wiedner Hauptstraße 8-10, A 1040 Vienna, Austria

Michael R. Went and Maarten Vos
Atomic and Molecular Physics Laboratories, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia

Kathrin Glantschnig
Institut für Physik, Fachbereich Theoretische Physik, University of Graz, Universitätsplatz 5, A 8010 Graz, Austria and University of Leoben, Franz-Josefstraße 18, A 8700, Austria

Claudia Ambrosch-Draxl
Lehrstuhl für Atomistic Modelling and Design of Materials, University of Leoben, Franz-Josefstraße 18, A 8700, Austria

Received 17 January 2008; published 15 April 2008

The dielectric function of Ag and Au for wavelengths ranging from the infrared to the vacuum ultraviolet regime was measured with reflection electron energy-loss spectroscopy (REELS). The spectra are compared to density functional theory (DFT) calculations and to experimental optical data available in the literature since about three decades ago. The REELS and DFT results exhibit good consistency, while the earlier optical data significantly deviate. The results demonstrate that REELS and DFT are powerful tools for the study of the electromagnetic response of surfaces.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.161404
DOI:
10.1103/PhysRevB.77.161404
PACS:
79.20.Fv, 71.20.Mq, 79.20.Kz, 61.43.Dq

*werner@iap.tuwien.ac.at

 
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