A general overview of slow light waveguide structures made of negative metamaterials is presented. We discuss the
conditions and the parameter space to achieve zero total energy flow and zero group velocity due to the degeneracy of
forward and backward waves in waveguides cladded with single negative metamaterials. Absorptive loss plays a
severely limiting role and can prevent achieving the zero group velocity condition. Gain can be introduced either in
dielectric or negative metamaterials to restore the zero group velocity condition. This type of slow light waveguide has a
large delay bandwidth product and is suitable for use in integrated optoelectronic circuits.