Photonic Band Gaps in One-Dimensionally Ordered Cold Atomic Vapors

Abstract

We experimentally investigate the Bragg reflection of light at one-dimensionally ordered atomic structures by using cold atoms trapped in a laser standing wave. By a fine tuning of the periodicity, we reach the regime of multiple reflection due to the refractive index contrast between layers, yielding an unprecedented high reflectance efficiency of 80%. This result is explained by the occurrence of a photonic band gap in such systems, in accordance with previous predictions.

References in corpus (9)

• Stationary pulses of light in an atomic medium
• Disordered insulator in an optical lattice
• Fano-Hopfield model and photonic band gaps for an arbitrary atomic lattice
• Threshold of a Random Laser with Cold Atoms
• Phase-sensitive detection of Bragg scattering at 1D optical lattices
• Multiple Reflections and Diffuse Scattering in Bragg Scattering at Optical Lattices
• Towards a random laser with cold atoms
• Dimensional Crossover in Bragg Scattering from an Optical Lattice
• Photonic spectrum of bichromatic optical lattices

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