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arXiv · 1210.4764

An Anderson-localized random nanolaser

Jin Liu·Pedro D. Garcia·Sara Ek·Niels Gregersen·Troels Suhr·Martin Schubert·Jesper Mørk·Søren Stobbe·Peter Lodahl
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Abstract

Precision is a virtue throughout science in general and in optics in particular where carefully fabricated nanometer-scale devices hold great promise for both classical and quantum photonics [1-6]. In such nanostructures, unavoidable imperfections often impose severe performance limits but, in certain cases, disorder may enable new functionalities [7]. Here we demonstrate on-chip random nanolasers where the cavity feedback is provided by the intrinsic disorder in a semiconductor photonic-crystal waveguide, leading to Anderson localization of light [8]. This enables highly efficient and broadband tunable lasers with very small mode volumes. We observe an intriguing interplay between gain, dispersion-controlled slow light, and disorder, which determines the cross-over from ballistic transport to Anderson localization. Such a behavior is a unique feature of non-conservative random media that enables the demonstration of all-optical control of random lasing. Our statistical analysis shows a way towards ultimate thresholdless random nanolasers.

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Jin Liu, Pedro D. Garcia, Sara Ek, Niels Gregersen, Troels Suhr, Martin Schubert, Jesper Mørk, Søren Stobbe, Peter Lodahl. 2012-10-17. An Anderson-localized random nanolaser. https://arxiv.org/abs/1210.4764

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