Pari-Time Symmetry Breaking in Ddouble-Slab Surface-Plasmon Waveguides

Seok Ho Song Physics, Hanyang University, Seoul, South Korea Youngsun Choi Physics, Hanyang University, Seoul, South Korea Seok Song Physics, Hanyang University, Seoul, South Korea Choloong Han Physics, Hanyang University, Seoul, South Korea Jong-Kyun Hong Electrical Engineering, Hanyang University, Seoul, South Korea

Asymmetric propagation behaviors of light in Parity-Time (PT) symmetric complex-index media are evaluated.[1] Dould-slab surface-plasmon polariton (DS-SPP) waveguide couplers,[2] consisting of metal slabs with loss and gain, are considered as the PT-symmeric media. So far, in demonstrations of the symmetry breaking in optical systems, the main difficulty has been to control gain and loss with a high reliability. The coupled DS-SPP waveguides proposed here allow us to separately and systematically control the parity and time symmetries, appealing that they would be an useful tool for investigating underlying physics on PT-symmetry breaking phenomena in non-Hermitian Hamiltonian systems.

Double-slab SPP waveguide couplers Mode propagation before and after PT-symmetry breaking

(Double-slab SPP coulers) (Mode propagation behaviors before and after PR-symmetry breaking)

[1] C. M. Bender and S. Boettcher, Physical Review Letters 80, 5243 (1998).

[2] Jaewoong Yoon, Seok Ho Song, and Suntak Park, Optics express, 15, 17151-17162. (2007).

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