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Phonon-enhanced light–matter interaction at the nanometre scale

Author

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  • R. Hillenbrand

    (Abteilung Molekulare Strukturbiologie, 82152 Martinsried & Center for NanoScience, Ludwig-Maximilians-Universität
    Ludwig-Maximilians-Universität)

  • T. Taubner

    (Abteilung Molekulare Strukturbiologie, 82152 Martinsried & Center for NanoScience, Ludwig-Maximilians-Universität
    Ludwig-Maximilians-Universität)

  • F. Keilmann

    (Abteilung Molekulare Strukturbiologie, 82152 Martinsried & Center for NanoScience, Ludwig-Maximilians-Universität
    Ludwig-Maximilians-Universität)

Abstract

Optical near fields exist close to any illuminated object. They account for interesting effects such as enhanced pinhole transmission1 or enhanced Raman scattering enabling single-molecule spectroscopy2. Also, they enable high-resolution (below 10 nm) optical microscopy3,4,5,6. The plasmon-enhanced near-field coupling between metallic nanostructures7,8,9 opens new ways of designing optical properties10,11,12 and of controlling light on the nanometre scale13,14. Here we study the strong enhancement of optical near-field coupling in the infrared by lattice vibrations (phonons) of polar dielectrics. We combine infrared spectroscopy with a near-field microscope that provides a confined field to probe the local interaction with a SiC sample. The phonon resonance occurs at 920 cm-1. Within 20 cm-1 of the resonance, the near-field signal increases 200-fold; on resonance, the signal exceeds by 20 times the value obtained with a gold sample. We find that phonon-enhanced near-field coupling is extremely sensitive to chemical and structural composition of polar samples, permitting nanometre-scale analysis of semiconductors and minerals. The excellent physical and chemical stability of SiC in particular may allow the design of nanometre-scale optical circuits for high-temperature and high-power operation.

Suggested Citation

  • R. Hillenbrand & T. Taubner & F. Keilmann, 2002. "Phonon-enhanced light–matter interaction at the nanometre scale," Nature, Nature, vol. 418(6894), pages 159-162, July.
    • Handle: RePEc:nat:nature:v:418:y:2002:i:6894:d:10.1038_nature00899
    DOI: 10.1038/nature00899
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    Cited by:

    1. Christian J. Eckhardt & Sambuddha Chattopadhyay & Dante M. Kennes & Eugene A. Demler & Michael A. Sentef & Marios H. Michael, 2024. "Theory of resonantly enhanced photo-induced superconductivity," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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