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Plasmonic beaming and active control over fluorescent emission

Author

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  • Young Chul Jun

    (Geballe Laboratory for Advanced Materials
    Present address: Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.)

  • Kevin C.Y. Huang

    (Geballe Laboratory for Advanced Materials)

  • Mark L. Brongersma

    (Geballe Laboratory for Advanced Materials)

Abstract

Nanometallic optical antennas are rapidly gaining popularity in applications that require exquisite control over light concentration and emission processes. The search is on for high-performance antennas that offer facile integration on chips. Here we demonstrate a new, easily fabricated optical antenna design that achieves an unprecedented level of control over fluorescent emission by combining concepts from plasmonics, radiative decay engineering and optical beaming. The antenna consists of a nanoscale plasmonic cavity filled with quantum dots coupled to a miniature grating structure that can be engineered to produce one or more highly collimated beams. Electromagnetic simulations and confocal microscopy were used to visualize the beaming process. The metals defining the plasmonic cavity can be utilized to electrically control the emission intensity and wavelength. These findings facilitate the realization of a new class of active optical antennas for use in new optical sources and a wide range of nanoscale optical spectroscopy applications.

Suggested Citation

  • Young Chul Jun & Kevin C.Y. Huang & Mark L. Brongersma, 2011. "Plasmonic beaming and active control over fluorescent emission," Nature Communications, Nature, vol. 2(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:2:y:2011:i:1:d:10.1038_ncomms1286
    DOI: 10.1038/ncomms1286
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