Measurement of a band-edge tail in the density of states of a photonic-crystal waveguide

TY - JOUR

T1 - Measurement of a band-edge tail in the density of states of a photonic-crystal waveguide

AU - Huisman, S.R.

AU - Ctistis, G.

AU - Stobbe, Søren

AU - Mosk, A. P.

AU - Herek, J.L.

AU - Lagendijk, A.

AU - Lodahl, Peter

AU - Vos, W.L.

AU - Pinkse, P.W.H.

PY - 2012/10/26

Y1 - 2012/10/26

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevB.86.155154

DO - 10.1103/PhysRevB.86.155154

M3 - Journal article

SN - 2469-9950

VL - 86

SP - 155154

JO - Physical Review B

JF - Physical Review B

IS - 15

ER -