Strong Coupling between Nanoscale Metamaterials and Phonons

    Authors

    D. J. Shelton; I. Brener; J. C. Ginn; M. B. Sinclair; D. W. Peters; K. R. Coffey;G. D. Boreman

    Comments

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    Abbreviated Journal Title

    Nano Lett.

    Keywords

    Metamaterials; phonon vibrational modes; normal mode splitting; split; ring resonators; near fields; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; INFRARED-ABSORPTION; TERAHERTZ; METAMATERIALS; SURFACE-PLASMONS; SPECTROSCOPY; MONOLAYERS; FREQUENCY; ANALOG; Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &; Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

    Abstract

    We use split ring resonators (SRRs) at optical frequencies to study strong coupling between planar metamaterials and phonon vibrations in nanometer-scale dielectric layers. A series of SRR metamaterials were fabricated on a semiconductor wafer with a thin intervening SiO2 dielectric layer. The dimensions of the SRRs were varied to tune the fundamental metamaterial resonance across the infrared (IR) active phonon band of SiO2 at 130 meV (31 THz). Strong anticrossing of these resonances was observed, indicative of strong coupling between metamaterial and phonon excitations. This coupling is very general and can occur with any electrically polarizable resonance including phonon vibrations in other thin film materials and semiconductor band-to-band transitions in the near to far IR. These effects may be exploited to reduce loss and to create unique spectral features that are not possible with metamaterials alone.

    Journal Title

    Nano Letters

    Volume

    11

    Issue/Number

    5

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    2104

    Last Page

    2108

    WOS Identifier

    WOS:000290373000044

    ISSN

    1530-6984

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