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Nano Lett. 2011 May 11;11(5):2104-8. doi: 10.1021/nl200689z. Epub 2011 Apr 4.

Strong coupling between nanoscale metamaterials and phonons.

Author information

1
CREOL, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816, United States. david.shelton@plasmonics-inc.com

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 SiO(2) dielectric layer. The dimensions of the SRRs were varied to tune the fundamental metamaterial resonance across the infrared (IR) active phonon band of SiO(2) 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.

PMID:
21462937
DOI:
10.1021/nl200689z

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