Threshold Characteristics of Slow-Light Photonic Crystal Lasers

Weiqi Xue, Yi Yu, Luisa Ottaviano, Yaohui Chen, Elizaveta Semenova, Kresten Yvind, Jesper Mørk

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    Abstract

    The threshold properties of photonic crystal quantum dot lasers operating in the slow-light regime are investigated experimentally and theoretically. Measurements show that, in contrast to conventional lasers, the threshold gain attains a minimum value for a specific cavity length. The experimental results are explained by an analytical theory for the laser threshold that takes into account the effects of slow light and random disorder due to unavoidable fabrication imperfections. Longer lasers are found to operate deeper into the slow-light region, leading to a trade-off between slow-light induced reduction of the mirror loss and slow-light enhancement of disorder-induced losses.
    Original languageEnglish
    Article number063901
    JournalPhysical Review Letters
    Volume116
    Issue number6
    Number of pages5
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2016

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