Journal
PHYSICAL REVIEW B
Volume 86, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.155154
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Funding
- FOM
- NWO-Nano
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We investigate light transport near the band edge of slow-light photonic-crystal waveguides using phase-sensitive near-field microscopy. We obtain and interpret high-resolution band structures, allowing the retrieval of the optical density of states for a one-dimensional periodic system with weak intrinsic disorder. Because of this disorder, the band edge is smeared out and the van Hove singularity is removed. The density of states shows a decaying tail in the band gap corresponding to Anderson-localized modes, as predicted by Lifshitz for solid-state systems.
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