Bulk spectrum and edge modes of 2D photonic crystals with parity and time-reversal symmetries broken in a different way are investigated. It is shown that for specific values of parameter of the symmetry reduction the bulk modes exhibit a peculiar one-way Dirac-like dispersion. The domain wall formed by two crystals with the symmetry reduction parameter reversed is shown to exhibit an edge mode which coexists with the one-way bulk Dirac regime. In addition, we demonstrate that parity-time symmetric interfaces between photonic crystals with gain and loss support a new class of dissipation-less surface modes.
Xiang Ni, Alexander B. Khanikaev, and Alexander A. Lisyansky, "Edge modes of 2D photonic crystals with and without PT symmetry
(Conference Presentation)," Proc. SPIE 9919, Nanophotonic Materials XIII, 99190B (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 7 November 2016); https://doi.org/10.1117/12.2238219.5159519607001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.