Abbreviated Journal Title
Phys. Rev. A
NON-HERMITIAN HAMILTONIANS; SPONTANEOUS EMISSION; CONICAL DIFFRACTION; PSEUDO-HERMITICITY; REAL SPECTRA; PT-SYMMETRY; LASERS; OPTICS; Optics; Physics, Atomic, Molecular & Chemical
We theoretically investigate the flow of electromagnetic waves in complex honeycomb photonic lattices with local PT symmetries. Such PT structure is introduced via a judicious arrangement of gain and loss across the honeycomb lattice, characterized by a gain and loss parameter gamma. We found a class of conical diffraction phenomena where the formed cone is brighter and travels along the lattice with a transverse speed proportional to root gamma.
Physical Review A
Ramezani, Hamidreza; Kottos, Tsampikos; Kovanis, Vassilios; and Christodoulides, Demetrios N., "Exceptional-point dynamics in photonic honeycomb lattices with PT symmetry" (2012). Faculty Bibliography 2010s. 3170.