Observations of zero-order bandgaps in negative-index photonic crystal superlattices at the near-infrared

Abstract

We present the first observations of zero-n bandgaps in photonic crystal superlattices consisting of alternating stacks of negative index photonic crystals and positive index dielectric materials in the near-infrared. Guided by ab initio three-dimensional numerical simulations, the fabricated nanostructured superlattices demonstrate the presence of zero-order gaps in remarkable agreement with theoretical predictions across a range of different superlattice periods and unit cell variations. These volume-averaged zero-index superlattice structures present a new type of photonic band gap, with potential for complete wavefront control for arbitrary phase delay lines and open cavity resonances.

14 pages, 3 Figures

References in corpus (2)

• Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared
• Beam oscillations and curling in chirped periodic structures with metamaterials

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