We further discuss the post-fabrication control over slow light in PhC waveguides. Here both permanent, passive control is possible - through post-processing of the PhC devices - and adaptable, active control, through electro-optic or thermo-optic tuning. We apply the latter to a coupled cavity geometry that displays a transmission peak analogous to electromagnetically induced transparency and show a tuneable delay of 300ps with a delay loss of approximately 15dB/ns.
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