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Opt Express. 2008 Jun 9;16(12):8711-9.

Aberration reduction and unique light focusing in a photonic crystal negative refractive lens.

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  • 1Yokohama National University, Department of Electrical and Computer Engineering 79-5 Tokiwadai, Hodogayaku, Yokohama 240-8501, Japan.

Abstract

Light focusing characteristics of a negative refractive lens fabricated out of a silicon-on-insulator photonic crystal (PC) slab are investigated theoretically and experimentally. It focuses in the near infrared, but the focal spot is degraded by a lens aberration. To reduce the aberration, we designed a composite PC that gives rise to a narrower focal spot. In addition, two unique functions of this lens are demonstrated: refocusing outside of the PC and parallel focusing, enabling image transfer and real image formation, respectively. These results prove the feasibility of an in-plane free space optical network based on negative refraction.

PMID:
18545584
[PubMed - indexed for MEDLINE]
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