期刊
PHYSICAL REVIEW B
卷 82, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.165103
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资金
- Council for Independent Research (Technology and Production Sciences and Natural Sciences)
We prove Anderson localization in a disordered photonic crystal waveguide by measuring the ensemble-averaged extinction mean-free path, l(e), which is controlled by the dispersion in the photon density of states (DOS) of the photonic crystal waveguide. Except for the very low DOS case, where out-of-plane losses are non-negligible, l(e) can be approximated to be the localization length xi. The extinction mean-free path shows a fivefold variation between the low-and the high-DOS regime, and it becomes shorter than the sample length thus giving rise to strongly confined modes. The dispersive behavior of l(e) demonstrates the close relation between Anderson localization and the DOS in disordered photonic crystals, which opens a promising route to controlling and exploiting Anderson-localized modes for efficient light confinement.
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