Localized mode hybridization by fine tuning of 2D random media

Abstract

We study numerically interaction of spatially localized modes in strongly scattering two-dimensional media. We move eigenvalues in the complex plane by changing gradually the index of a single scatterer. When spatial and spectral overlap is sufficient, localized states couple and avoided level crossing is observed. We show that local manipulation of the disordered structure can couple several localized states to form an extended chain of hybridized modes crossing the entire sample, thus changing the nature of certain modes from localized to extended in a nominally localized disordered system. We suggest such a chain is the analog in 2D random systems of the 1D necklace states, the occasional open channels predicted by J.B. Pendry through which the light can sneak through an opaque medium.

To be published in Optics Letters

References in corpus (4)

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Cited by in corpus (8)

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• One single static measurement predicts wave localization in complex structures
• Tunable degree of localization in random lasers with controlled interaction
• Disorder-induced cavities, resonances, and lasing in randomly-layered media
• Hybridized/Coupled Multiple Resonances in Nacre
• Linear and Non-linear Rabi Oscillations of a Two-Level System Resonantly Coupled to an Anderson-Localized Mode