575 research outputs found
Wave scattering by PT-symmetric epsilon-near-zero periodic structures
The optical properties of PT-symmetric epsilonnear-zero (ENZ) periodic stack
of the layers with balanced loss and gain have been examined. The effect of
periodicity on the unidirectional tunneling phenomenon and symmetry breaking is
determined. The performed analysis provides insight in the main features of the
second harmonic (SH) generation by the ENZ PTsymmetric periodic structure.Comment: 4 pages, 6 figures, EuMW 2015 conferenc
Nonreciprocal Scattering by PT-symmetric stack of the layers
The nonreciprocal wave propagation in PT-symmetric periodic stack of binary
dielectric layers characterised by balances loss and gain is analysed. The main
mechanisms and resonant properties of the scattered plane waves are illustrated
by the simulation results, and the effects of the periodicity and individual
layer parameters on the stack nonreciprocal response are discussed. Gaussian
beam dynamics in this type of structure is examined. The beam splitting in
PT-symmetric periodic structure is observed. It is demonstrated that for slant
beam incidence the break of the symmetry of field distribution takes place.Comment: 4 pages, 5 figures, ICTON 2015 conferenc
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