Paper
25 April 2012 From zero-average index metamaterials to zero-dispersion curvature photonic crystal superlattices for self-collimation of light
Julien Arlandis, Emmanuel Centeno, Rémi Pollès, Antoine Moreau
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Abstract
Zero-average index metamaterials and photonic crystal superlattices are well known for presenting uncommon properties such as a new forbidden band for photons and self-collimation effect. In this work, we show how these two approaches can be combined to finely control beam propagation and we develop a theory that provides a comprehensive understanding of these phenomenon. We show that the curvature of the dispersion relation plays a crucial role to cancel light diffraction. This concept leads to the design of PhC superlattices with a very low filling factor in air and presenting a slow light regime. The frequency selectivity of the self-collimation effect is in addition shown to be increased by 10 or 50 compared to common 2D photonic crystal devices.
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Julien Arlandis, Emmanuel Centeno, Rémi Pollès, and Antoine Moreau "From zero-average index metamaterials to zero-dispersion curvature photonic crystal superlattices for self-collimation of light", Proc. SPIE 8425, Photonic Crystal Materials and Devices X, 842510 (25 April 2012); https://doi.org/10.1117/12.922223
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KEYWORDS
Photonic crystals

Superlattices

Metamaterials

Dispersion

Diffraction

Beam propagation method

Beam shaping

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