Beam Dynamics in PT Symmetric Optical Lattices
Abstract
The possibility of parity-time (PT) symmetric periodic potentials is investigated within the context of optics. Beam dynamics in this new type of optical structures is examined in detail for both one- and two-dimensional lattice geometries. It is shown that PT periodic structures can exhibit unique characteristics stemming from the nonorthogonality of the associated Floquet-Bloch modes. Some of these features include double refraction, power oscillations, and eigenfunction unfolding as well as nonreciprocal diffraction patterns.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2008
- DOI:
- Bibcode:
- 2008PhRvL.100j3904M
- Keywords:
-
- 42.25.Bs;
- 11.30.Er;
- 42.82.Et;
- Wave propagation transmission and absorption;
- Charge conjugation parity time reversal and other discrete symmetries;
- Waveguides couplers and arrays