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Spatial modulation of light transmission through a single microcavity by coupling of photosynthetic complex excitations to surface plasmons

Author

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  • Itai Carmeli

    (University Center for Nanoscience and Nanotechnology
    Department of Materials Science and Engineering)

  • Moshik Cohen

    (Faculty of Engineering, Bar-Ilan University)

  • Omri Heifler

    (Tel-Aviv University)

  • Yigal Lilach

    (University Center for Nanoscience and Nanotechnology)

  • Zeev Zalevsky

    (Faculty of Engineering, Bar-Ilan University)

  • Vladimiro Mujica

    (Arizona State University)

  • Shachar Richter

    (University Center for Nanoscience and Nanotechnology
    Department of Materials Science and Engineering)

Abstract

Molecule–plasmon interactions have been shown to have a definite role in light propagation through optical microcavities due to strong coupling between molecular excitations and surface plasmons. This coupling can lead to macroscopic extended coherent states exhibiting increment in temporal and spatial coherency and a large Rabi splitting. Here, we demonstrate spatial modulation of light transmission through a single microcavity patterned on a free-standing Au film, strongly coupled to one of the most efficient energy transfer photosynthetic proteins in nature, photosystem I. Here we observe a clear correlation between the appearance of spatial modulation of light and molecular photon absorption, accompanied by a 13-fold enhancement in light transmission and the emergence of a distinct electromagnetic standing wave pattern in the cavity. This study provides the path for engineering various types of bio-photonic devices based on the vast diversity of biological molecules in nature.

Suggested Citation

  • Itai Carmeli & Moshik Cohen & Omri Heifler & Yigal Lilach & Zeev Zalevsky & Vladimiro Mujica & Shachar Richter, 2015. "Spatial modulation of light transmission through a single microcavity by coupling of photosynthetic complex excitations to surface plasmons," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8334
    DOI: 10.1038/ncomms8334
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