title: Goos-Hänchen shift and localization of optical modes in deformed microcavities.
abstract: Recently, an interesting phenomenon of spatial localization of optical modes along periodic ray trajectories near avoided resonance crossings has been observed [Wiersig, Phys. Rev. Lett. 97, 253901 (2006)]. For the case of a microdisk cavity with elliptical cross section, we use the Husimi function to analyze this localization in phase space. Moreover, we present a semiclassical explanation of this phenomenon in terms of the Goos-Hänchen shift, which works very well even deep in the wave regime. This semiclassical correction to the ray dynamics modifies the phase-space structure such that modes can localize either on stable islands or along unstable periodic ray trajectories.
authors.affiliation: Institut für Theoretische Physik, Universität Bremen, Postfach 330 440, D-28334 Bremen, Germany.
authors.forename: Julia
authors.initials: J
authors.lastname: Unterhinninghofen
authors.forename: Jan
authors.initials: J
authors.lastname: Wiersig
authors.forename: Martina
authors.initials: M
authors.lastname: Hentschel