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High-purity transmission of a slow light odd mode in a photonic crystal waveguide
2012
Optics Letters
Preserved Fulltext
We demonstrate a novel scheme to control the excitation symmetry for an odd mode in a photonic crystal waveguide and investigate the spectral signature of this slow light mode. An odd-mode Mach-Zehnder coupler is introduced to transform mode symmetry and excite a high-purity odd mode with 20 dB signal contrast over the background. Assisted by a mixed-mode Mach-Zehnder coupler, slow light mode beating can be observed and is utilized to determine the group index of this odd mode. With slow light
doi:10.1364/ol.37.003189
pmid:22859128
fatcat:xliy2pqvpbdvxnxymdzk3s4o6q