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Phys Rev Lett. 2004 Aug 13;93(7):073902. Epub 2004 Aug 11.

Negative refraction at infrared wavelengths in a two-dimensional photonic crystal.

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  • 1Department of Microelectronics and Information Technology, Royal Institute of Technology, Electrum 229, S-16440 Kista, Sweden.

Abstract

We report on the first experimental evidence of negative refraction at telecommunication wavelengths by a two-dimensional photonic crystal field. Samples were fabricated by chemically assisted ion beam etching in the InP-based low-index constrast system. Experiments of beam imaging and light collection show light focusing by the photonic crystal field. Finite-difference time-domain simulations confirm that the observed focusing is due to negative refraction in the photonic crystal area.

PMID:
15324238
[PubMed]
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