Polarization control of quantum dot emission by chiral photonic crystal slabs

Sergey V. Lobanov, Thomas Weiss, Nikolay A. Gippius, Sergei G. Tikhodeev, Vladimir D. Kulakovskii, Kuniaki Konishi, Makoto Kuwata-Gonokami

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)

    Abstract

    We investigate theoretically the polarization properties of the quantum dot's (QDs) optical emission from chiral photonic crystal structures made of achiral materials in the absence of external magnetic field at room temperature. The mirror symmetry of the local electromagnetic field is broken in this system due to the decreased symmetry of the chiral modulated layer. As a result, the radiation of randomly polarized QDs normal to the structure becomes partially circularly polarized. The sign and degree of circular polarization are determined by the geometry of the chiral modulated structure and depend on the radiation frequency. A degree of circular polarization up to 99% can be achieved for randomly distributed QDs, and can be close to 100% for some single QDs.

    Original languageEnglish
    Pages (from-to)1528-1531
    Number of pages4
    JournalOptics Letters
    Volume40
    Issue number7
    DOIs
    Publication statusPublished - 2015

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