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Title: Simultaneous multi-frequency topological edge modes between one-dimensional photonic crystals
Authors: Choi, KH 
Ling, CW 
Lee, KF 
Tsang, YH 
Fung, KH 
Issue Date: 1-Apr-2016
Source: Optics letters, 1 Apr., 2016, v. 41, no. 7, p. 1644-1647
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 andgaps. 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.
Keywords: Photonic crystals
Berry's phase
Harmonic generation and mixing
Publisher: Optical Society of America
Journal: Optics letters 
ISSN: 0146-9592
EISSN: 1539-4794
DOI: 10.1364/OL.41.001644
Rights: © 2016 Optical Society of America
© 2016 Optica Publishing Group. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
The following publication Ka Hei Choi, C. W. Ling, K. F. Lee, Y. H. Tsang, and Kin Hung Fung, "Simultaneous multi-frequency topological edge modes between one-dimensional photonic crystals," Opt. Lett. 41, 1644-1647 (2016) is available at https://doi.org/10.1364/OL.41.001644.
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