Abstract
The phonon--surface-polariton (SP) interaction in addition to the phonon-phonon mixing is accounted for in order to get the Brillouin scattering cross section from an optical bigrating or from a rough surface of a metal. We limit our attention to nontransparent media, thus neglecting from the start the elasto-optic effect and linearize the ripple contribution in the extinction-theorem equations. We compare these results with the experimental data. In a silver grating the Rayleigh peak shows a ``replica'' in the frequency spectrum due to phonon-SP coupling. On the contrary, in a Si grating phonon-phonon mixing is responsible for the observed gaps in the second- and higher-order Brillouin zones.
Sign-in/Register to access full text options 
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.
