Berlin 2005 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 16: Poster Ia

HL 16.26: Poster

Freitag, 4. März 2005, 16:30–19:00, Poster TU E

Beam splitter Design using mixed phase space cavities — •Oliver Bendix, Antonio Mendez-Bermudez, and Ragnar Fleischmann — MPI für Strömungsforschung und Fakultät Physik der Universität Göttingen

We propose the construction of electronic/electromagnetic beam splitters using two-dimensional multi-lead waveguides. A prototype two-lead waveguide is locally deformed in order to produce a ternary incomplete horseshoe (proper of mixed phase space). Due to dynamical tunneling to phase space resonant islands the appearance of quasibound states (QBS) is induced. Then, we attach transversal leads to the waveguide on the deformation region in positions along the QBS, where the horseshoe is only slightly perturbed. We show that such QBS pump into the transversal leads giving rise to beam splitters. This assumption is based on the investigations due to classical Poincarè Maps [1] and quantum-mechanical Scattering Wave Functions (its Husimi Representation).

[1] J. A. Méndez-Bermúdez, G. A. Luna-Acosta, P. Šeba, and K. N. Pichugin, Phys. Rev. B 67, 161104(R) (2003).