Dresden 2014 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 23: Quantum Chaos

DY 23.5: Vortrag

Mittwoch, 2. April 2014, 16:00–16:15, ZEU 146

Asymmetric backscattering in waveguide-coupled microdisk resonators — •Johannes Kramer and Jan Wiersig — Otto-von-Guericke-Universität Magdeburg, 39016 Magdeburg

Recently, it has been discovered that the coherent backscattering of counter-propagating waves in deformed or perturbed microdisk cavities can be asymmetric provided that the cavity does not possess a mirror-reflection symmetry [1,2]. This leads to the appearance of nonorthogonal pairs of copropagating optical modes with a preferred sense of rotation. In the extreme case the pair of modes coalesce at a so-called exceptional point. We present finite-difference time-domain (FDTD) simulations which indicate that the asymmetric backscattering can be unambiguously identified in transmission and reflection experiments on waveguide-coupled microdisks.

[1] J. Wiersig, A. Eberspächer, J.-B. Shim, J.-W. Ryu, S. Shinohara, M. Hentschel, and H. Schomerus, Phys. Rev. A 84, 023845 (2011)

[2] J. Wiersig, Phys. Rev. A 84, 063828 (2011)