Beaming random lasers with soliton control

Sreekanth Perumbilavil, Armando Piccardi, Raouf Barboza, Oleksandr Buchnev, Martti Kauranen, Giuseppe Strangi, Gaetano Assanto

    Research output: Contribution to journalArticleScientificpeer-review

    30 Citations (Scopus)
    40 Downloads (Pure)

    Abstract

    Random lasers are resonator-less light sources where feedback stems from recurrent scattering at the expense of spatial profile and directionality. Suitably-doped nematic liquid crystals can random lase when optically pumped near resonance(s); moreover, through molecular reorientation within the transparency region, they support self-guided optical spatial solitons, i.e., light-induced waveguides. Here, we synergistically combine solitons and collinear pumping in weakly scattering dye-doped nematic liquid crystals, whereby random lasing and self-confinement concur to beaming the emission, with several improved features: all-optical switching driven by a low-power input, laser directionality and smooth output profile with high-conversion efficiency, externally controlled angular steering. Such effects make soliton-assisted random lasers an outstanding route towards application-oriented random lasers.

    Original languageEnglish
    Article number3863
    Number of pages7
    JournalNature Communications
    Volume9
    Issue number1
    DOIs
    Publication statusPublished - 1 Dec 2018
    Publication typeA1 Journal article-refereed

    Publication forum classification

    • Publication forum level 3

    ASJC Scopus subject areas

    • Chemistry(all)
    • Biochemistry, Genetics and Molecular Biology(all)
    • Physics and Astronomy(all)

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