Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance

Details Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance

2010-11-25

arxiv.org/abs/1011.5536v1

Physics

Optics

5 pages, 4 figures. Submitted to PRL

Scientific paper

We propose a concept of a low-symmetry three-dimensional metamaterial exhibiting a Double- Continuum Fano (DCF) optical resonance. Such metamaterial is described as a birefringent medium supporting a discrete "dark" electromagnetic state weakly coupled to the continua of two nondegen- erate "bright" bands of orthogonal polarizations. It is demonstrated that light propagation through such DCF metamaterial can be slowed down over a broad frequency range when the medium param- eters (e.g. frequency of the "dark" mode) are adiabatically changed along the optical path. Using a specific metamaterial implementation, we demonstrate that the DCF approach to slow light (SL) is superior to that of the EIT because it enables spectrally uniform group velocity and transmission coefficient.

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