TY - JOUR

T1 - Nonorthogonal pairs of copropagating optical modes in deformed microdisk cavities

AU - Wiersig, Jan

AU - Eberspächer, Alexander

AU - Shim , Jeong-Bo

AU - Ryu, Jung-Wan

AU - Shinohara, Sususmu

AU - Hentschel, M.

AU - Schomerus, Henning

N1 - ©2011 American Physical Society

PY - 2011/8/29

Y1 - 2011/8/29

N2 - Recently, it has been shown that spiral-shaped microdisk cavities support highly nonorthogonal pairs of copropagating modes with a preferred sense of rotation (spatial chirality) [ J. Wiersig et al. Phys. Rev. A 78 053809 (2008)]. Here, we provide numerical evidence which indicates that such pairs are a common feature of deformed microdisk cavities which lack mirror symmetries. In particular, we demonstrate that discontinuities of the cavity boundary such as the notch in the spiral cavity are not needed. We find a quantitative relation between the nonorthogonality and the chirality of the modes which agrees well with the predictions from an effective non-Hermitian Hamiltonian. A comparison to ray-tracing simulations is given.

AB - Recently, it has been shown that spiral-shaped microdisk cavities support highly nonorthogonal pairs of copropagating modes with a preferred sense of rotation (spatial chirality) [ J. Wiersig et al. Phys. Rev. A 78 053809 (2008)]. Here, we provide numerical evidence which indicates that such pairs are a common feature of deformed microdisk cavities which lack mirror symmetries. In particular, we demonstrate that discontinuities of the cavity boundary such as the notch in the spiral cavity are not needed. We find a quantitative relation between the nonorthogonality and the chirality of the modes which agrees well with the predictions from an effective non-Hermitian Hamiltonian. A comparison to ray-tracing simulations is given.

U2 - 10.1103/PhysRevA.84.023845

DO - 10.1103/PhysRevA.84.023845

M3 - Journal article

VL - 84

JO - Physical review a

JF - Physical review a

SN - 1050-2947

IS - 2

M1 - 023845

ER -