Abstract
The linear-optical properties of unbacked thin metal films are studied within the jellium model and the time-dependent density-functional approach. Unlike most previous calculations, the present ones treat both longitudinal and transverse components of electromagnetic fields microscopically and results are performed in terms of strictly calculated reflection, transmission, and absorption coefficients. Dependences of the collective mode frequencies on metal film thickness are discussed. It is shown that in thin metal film there are collective modes which can be interpreted as standing plasma waves. Also it is demonstrated that in thin metal films there exists a couple of surface modes which are related to the so-called multipole surface-plasmon mode. Spectral and angular dependences of optical response are discussed in detail. A few specific features of optical response under conditions of collective mode excitations have been found. In particular, metal film cannot absorb more than a half of energy flux of incident wave. At the angle of incidence, when absorption reaches the absolute maximum the reflection and transmission coefficients are equal to one-fourth. These and some other features appear in the same manner for different collective mode excitations. Also, we consider how the spectrum of collective mode excitations is transformed under the transition from two- to three-dimensional electron systems.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
