Abstract
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
Original language | English |
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Article number | 155154 |
Journal | Physical review B: Condensed matter and materials physics |
Volume | 86 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2012 |
Keywords
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