Physics – Condensed Matter – Materials Science
Scientific paper
2008-08-20
Phys. Rev. B 78, 205409 (2008)
Physics
Condensed Matter
Materials Science
7 pages, 10 figures
Scientific paper
10.1103/PhysRevB.78.205409
While the optical properties of thin metal films are well understood in the visible and near-infrared range, little has been done in the mid- and far-infrared region. Here we investigate ultra-thin gold films prepared on Si(111)(7 x 7) in UHV by measuring in the frequency range between 500 cm-1 and 7000 cm-1 and for temperatures between 300 K and 5 K. The nominal thickness of the gold layers ranges between one monolayer and 9 nm. The frequency and temperature dependences of the thicker films can be well described by the Drude model of a metal, when taking into account classical size effects due to surface scattering. The films below the percolation threshold exhibit a non-metallic behavior: the reflection increases with frequency and decreases with temperature. The frequency dependence can partly be described by a generalized Drude model. The temperature dependence does not follow a simple activation process. For monolayers we observe a transition between surface states around 1100 cm-1.
Brandt Tobby
Dressel Martin
Gompf Bruno
Hövel Martin
No associations
LandOfFree
Temperature and frequency dependent optical properties of ultra-thin Au films does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Temperature and frequency dependent optical properties of ultra-thin Au films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature and frequency dependent optical properties of ultra-thin Au films will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-609507