Abstract
We show theoretically that, in the limit of weak dispersion, one-dimensional binary centrosymmetric photonic crystals can support topological edge modes in all photonic bandgaps. By analyzing their bulk band topology, these "harmonic" topological edge modes can be designed in a way that they exist at all photonic bandgaps opened at the center of the Brillouin zone, at all gaps opened at the zone boundaries, or both. The results may suggest a new approach to achieve robust multi-frequency coupled modes for applications in nonlinear photonics, such as frequency upconversion.
Original language | English |
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Pages (from-to) | 1644-1647 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 41 |
Issue number | 7 |
DOIs | |
Publication status | Published - 1 Apr 2016 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics