TITLE

The focusing effect of graded index photonic crystals

AUTHOR(S)
Kurt, H.; Colak, E.; Cakmak, O.; Caglayan, H.; Ozbay, E.
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p171108
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We describe an approach to implement graded index (GRIN) structures using two-dimensional photonic crystals (PCs). The lattice spacing along the transverse direction to propagation is altered and we show, both theoretically and experimentally, that such a spatial perturbation is an effective way to obtain GRIN PC. The response of the structure to spatially wide incident beams is investigated and strong focusing behavior is observed. The large spot size conversion ratio can be attainable and is mainly limited by the finite size of the structure. The designed GRIN PC shows promise for use in optical systems that require compact and powerful focusing elements compared to the traditional bulky lenses.
ACCESSION #
35279110

 

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