Actively tunable bistable optical Yagi-Uda nanoantenna

Ivan S. Maksymov, Andrey E. Miroshnichenko, Yuri S. Kivshar

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    58 Citations (Scopus)
    15 Downloads (Pure)

    Abstract

    We propose and theoretically demonstrate a novel type of optical Yagi-Uda nanoantennas tunable via variation of the free-carrier density of a semiconductor disk placed in a gap of a metallic dipole feeding element. Unlike its narrowband all-metal counterparts, this nanoantenna exhibits a broadband unidirectional emission and demonstrates a bistable response in a preferential direction of the far-field zone, which opens up unique possibilities for ultrafast control of subwavelength light not attainable with dipole or bowtie architectures.

    Original languageEnglish
    Pages (from-to)8929-8938
    Number of pages10
    JournalOptics Express
    Volume20
    Issue number8
    DOIs
    Publication statusPublished - 09 Apr 2012

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